Gertjan Ettema

About

Background and activities

Phd (1990) i human movement science, VU Univeristy Amsterdam.

Teaching: Biomechanics og human movement and motor control

Research: Biomechanics and work physiology in motor behaviour and sports performance

Working at Centre for Elite Sports Research

Publications

2026

Severin, Anna Cecilia; Baumgart, Julia Kathrin; Kocbach, Jan Martin; Ettema, Gerardus Johannes Cornelis. (2026) Differences in speed, trunk range of motion, and cycle kinematics between Para-Nordic sit-skiing classes across inclines. Journal of Sports Sciences
Academic article

2025

Ettema, Gerardus Johannes Cornelis; Danielsen, Jørgen; Øvstehage, Vemund; Skovereng, Knut. (2025) On the estimation of total muscle work done in human walking. Journal of Experimental Biology
Academic article
Skovereng, Knut; Sandbakk, Øyvind Bucher; Ettema, Gertjan; Noordhof, Dionne Adriana; Seeberg, Trine Margrethe; Kocbach, Jan Martin; Danielsen, Jørgen. (2025) The effect of work rate on metabolic and mechanical intensity measures across skating style sub-techniques in cross-country skiing. European Journal of Sport Science (EJSS)
Academic article
Severin, Anna Cecilia; Ettema, Gertjan; Kocbach, Jan Martin. (2025) A method for processing inertial measurement unit data for para-Nordic sit-ski race analysis: a step-by-step guide. Sports Engineering
Academic article

2024

Elfmark, Ola Anker; Sandbakk, Øyvind Bucher; Brevig, Magnus; Ettema, Gertjan. (2024) Performance and jump-to-jump development in the first female ski flying competition in history. Frontiers in Sports and Active Living
Academic article
Eythorsdottir, Ingrid Eir Thorp; Gløersen, Øyvind; Rice, Hannah; Werkhausen, Amelie; Ettema, Gertjan; Mentzoni, Fredrik; Solberg, Paul Andre; Lindberg, Kolbjørn Andreas; Paulsen, Gøran. (2024) The Battle of the Equations: A Systematic Review of Jump Height Calculations Using Force Platforms. Sports Medicine
Academic literature review

2023

Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) Utvikling av teknikk.
Non-fiction chapter
Haugnes, Pål; Kocbach, Jan Martin; Noordhof, Dionne Adriana; Talsnes, Rune Kjøsen; Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) The influence of tactical positioning on performance in sprint cross-country skiing. PLOS ONE
Academic article
Ettema, Gertjan. (2023) The Force–Velocity Profiling Concept for Sprint Running Is a Dead End. International Journal of Sports Physiology and Performance (IJSPP)
Academic literature review
Loland, Sigmund; Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) The study of movement skills in sports: toward an integrative approach. Frontiers in Psychology
Academic article
Ettema, Gertjan; Skovereng, Knut; Ritman, Tobias Elvevold; Danielsen, Jørgen. (2023) The role of external power demand on the choice of technique in classic cross-country skiing. PLOS ONE
Academic article
Ettema, Gertjan. (2023) Incorporating internal work leads to overestimations of total work in sprint running. European Journal of Applied Physiology
Commentary
Haugnes, Pål; Sandbakk, Øyvind Bucher; Ettema, Gertjan; Noordhof, Dionne Adriana. (2023) Doctoral theses at NTNU (2023:235) "Sprinting for the win in cross-country skiing: Pacing strategy, race tactics, and the finish sprint". NTNU Grafisk senter
Doctoral thesis

2022

Ettema, Gertjan; Haug, Aurora Aasrud; Ludvigsen, Tonje Pedersen; Danielsen, Jørgen. (2022) The role of stroke rate and intensity on rowing technique. Sports Biomechanics
Academic article
Elfmark, Ola; Ettema, Gertjan; Gilgien, Matthias. (2022) Assessment of the steady glide phase in ski jumping. Journal of Biomechanics
Academic article
Haugnes, Pål; Kocbach, Jan; Talsnes, Rune Kjøsen; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind. (2022) Race tactics in the heats of a sprint cross-country skiing competition. Swedish Winter Sports Research Centre at Mid Sweden University
Anthology
Elfmark, Ola; Ettema, Gertjan; Jølstad, Petter Andre; Gilgien, Matthias. (2022) Kinematic Determination of the Aerial Phase in Ski Jumping. Sensors
Academic article
Haugnes, Pål; Kocbach, Jan; Talsnes, Rune Kjøsen; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind. (2022) The influence of race tactics for performance in the heats of an international sprint cross-country skiing competition. PLOS ONE
Academic article

2021

Severin, Cecilia; Danielsen, Jørgen; Erichsen, Jorgen Falck; Eikevåg, Sindre Wold; Steinert, Martin; Ettema, Gertjan; Baumgart, Julia Kathrin. (2021) Case Report: Adjusting Seat and Backrest Angle Improves Performance in an Elite Paralympic Rower. Frontiers in Sports and Active Living
Academic article
Sandbakk, Øyvind; Haugen, Thomas André; Ettema, Gerardus Johannes C. (2021) The influence of exercise modality on training load management. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David Caley Ruud; Ettema, Gertjan. (2021) Mechanical energy and propulsion mechanics in roller-skiing double-poling at increasing speeds. PLOS ONE
Academic article
Hansen, Linda Marie; Sandbakk, Øyvind; Ettema, Gertjan; Baumgart, Julia Kathrin. (2021) Upper- vs. Lower-Body Exercise Performance in Female and Male Cross-Country Skiers. Frontiers in Sports and Active Living
Academic article
Sandbakk, Øyvind; Haugen, Thomas André; Ettema, Gertjan. (2021) The influence of exercise modality on training load management. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Baumgart, Julia Kathrin; Ettema, Gertjan; Griggs, Katy E.; Goosey-Tolfrey, Victoria Louise; Leicht, Christof Andreas. (2021) A Reappraisal of Ventilatory Thresholds in Wheelchair Athletes With a Spinal Cord Injury: Do They Really Exist?. Frontiers in Physiology
Academic article
Elfmark, Ola; Ettema, Gertjan. (2021) Aerodynamic investigation of the inrun position in Ski jumping. Sports Biomechanics
Academic article
Elfmark, Ola; Ettema, Gertjan; Groos, Daniel; Ihlen, Espen Alexander F.; Velta, Rune; Haugen, Per; Bråten, Steinar; Gilgien, Matthias. (2021) Performance analysis in ski jumping with a differential global navigation satellite system and video-based pose estimation. Sensors
Academic article
Noordhof, Dionne; Danielsson, Marius Lyng; Skovereng, Knut; Danielsen, Jørgen; Seeberg, Trine Margrethe; Haugnes, Pål; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2021) The dynamics of the anaerobic energy contribution during a simulated mass-start competition while roller-ski skating on a treadmill. Frontiers in Sports and Active Living
Academic article

2020

Dalen, Terje; Aune, Tore Kristian; Hjelde, Geir Håvard; Ettema, Gertjan; Sandbakk, Øyvind; McGhie, David. (2020) Player load in male elite soccer: Comparisons of patterns between matches and positions. PLOS ONE
Academic article
McGhie, David; Østerås, Sindre; Ettema, Gertjan; Paulsen, Gøran; Sandbakk, Øyvind. (2020) Strength Determinants of Jump Height in the Jump Throw Movement in Women Handball Players. Journal of Strength and Conditioning Research
Academic article
Skovereng, Knut; Aasvold, Lorents Ola; Ettema, Gertjan. (2020) On the effect of changing handgrip position on joint specific power and cycling kinematics in recreational and professional cyclists. PLOS ONE
Academic article
Ettema, Gertjan; Braaten, Steinar; Danielsen, Jørgen; Fjeld, Birk Eirik. (2020) Imitation jumps in ski jumping: Technical execution and relationship to performance level. Journal of Sports Sciences
Academic article
Luchsinger, Harri Simon; Kocbach, Jan; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2020) Contribution from cross-country skiing, start time and shooting components to the overall and isolated biathlon pursuit race performance. PLOS ONE
Academic article
Kolsung, Erik Borg; Ettema, Gertjan; Skovereng, Knut. (2020) Physiological Response to Cycling With Variable Versus Constant Power Output. Frontiers in Physiology
Academic article
Løkkeborg, Johannes Alnes; Ettema, Gerardus Johannes C. (2020) The role of incline, speed and work rate on the choice of technique in classical roller skiing. PLOS ONE
Academic article

2019

Almquist, Nicki Winfield; Ettema, Gertjan; Hopker, James; Sandbakk, Øyvind; Rønnestad, Bent. (2019) The Effect of 30-Second Sprints During Prolonged Exercise on Gross Efficiency, Electromyography, and Pedaling Technique in Elite Cyclists. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Haugen, Thomas André; McGhie, David; Ettema, Gertjan. (2019) Sprint running: from fundamental mechanics to practice -a review. European Journal of Applied Physiology
Academic literature review
Luchsinger, Harri; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2019) The Contribution From Cross-Country Skiing and Shooting Variables on Performance Level and Sex Differences in Biathlon World Cup Individual Races. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Aasvold, Lorents Ola; Ettema, Gertjan; Skovereng, Knut. (2019) Joint specific power production in cycling: The effect of cadence and intensity. PLOS ONE
Academic article
Ettema, Gertjan; McGhie, David. (2019) Biomekanikk og bevegelse.
Non-fiction chapter
Rasdal, Vegard Finserås; Ettema, Gertjan; Sandbakk, Øyvind. (2019) Concurrent optimization of two extremes: performance, physiological, and training characteristics of world class Nordic combined athletes. Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David; Ettema, Gertjan. (2019) Mechanical energetics and dynamics of uphill double-poling on roller-skis at different incline-speed combinations. PLOS ONE
Academic article
Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Ettema, Gertjan; Sandbakk, Øyvind. (2019) The Interval-Based Physiological and Mechanical Demands of Cross-Country Ski Training. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
McGhie, David; Sandbakk, Øyvind; Østerås, Sindre; Ettema, Gertjan. (2019) Is There a Trade-Off Between Maximum Jumping and Throwing Capability in the Handball Jump Throw?. Sage Open
Academic article

2018

Haugnes, Pål; Torvik, Per Øyvind; Ettema, Gertjan; Kocbach, Jan; Sandbakk, Øyvind. (2018) The Effect of Maximal Speed Ability, Pacing Strategy and Technique on the Finish-Sprint of a Sprint Cross-Country Skiing Competition. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Haugen, Thomas André; Danielsen, Jørgen; Alnes, Leif Olav; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2018) On the importance of “front-side mechanics” in athletics sprinting. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Bolger, Conor; Bessone, Veronica; Federolf, Peter Andreas; Ettema, Gertjan; Sandbakk, Øyvind. (2018) The influence of increased distal loading on metabolic cost, efficiency, and kinematics of roller ski skating. PLOS ONE
Academic article
Baumgart, Julia Kathrin; Moes, Maaike; Skovereng, Knut; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Examination of gas exchange and blood lactate thresholds in Paralympic athletes during upper-body poling. PLOS ONE
Academic article
Ettema, Gertjan; Øksnes, Magne; Kveli, Espen; Sandbakk, Øyvind. (2018) The effect of exhaustive exercise on the choice of technique and physiological response in classical roller skiing. European Journal of Applied Physiology
Academic article
Baumgart, Julia Kathrin; Gurtler, Laura; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Comparison of peak oxygen uptake and exercise efficiency between upper-body poling and arm crank ergometry in trained paraplegic and able-bodied participants. European Journal of Applied Physiology
Academic article
Luchsinger, Harri; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Comparison of the Effects of Performance Level and Sex on Sprint Performance in the Biathlon World Cup. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Danielsen, Jørgen; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Energetics and dynamics of double poling cross-country skiing. Norges teknisk-naturvitenskapelige universitet
Doctoral thesis

2017

Haugen, Thomas; Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2017) Kinematic stride cycle asymmetry is not associated with sprint performance and injury prevalence in athletic sprinters. Scandinavian Journal of Medicine & Science in Sports
Academic article
Rasdal, Vegard; Fudel, Ronny; Kocbach, Jan; Moen, Frode; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Association between laboratory capacities and world-cup performance in Nordic combined. PLOS ONE
Academic article
Ettema, Gertjan; Kveli, Espen; Øksnes, Magne; Sandbakk, Øyvind. (2017) The role of speed and incline in the spontaneous choice of technique in classical roller-skiing. Human Movement Science
Academic article
Haugnes, Pål; Kocbach, Jan; Torvik, Per Øyvind; Ekren, Thomas; Ettema, Gertjan; Sandbakk, Øyvind. (2017) How fast are cross-country skiers in the finish-sprint during a sprint competition? Book of Abstracts: "Performance in snow sports: Translating science into practice". Swedish winter sports research centre, Mid Sweden University
Research report
Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2017) The effect of exercise intensity on joint power and dynamics in ergometer double-poling performed by cross-country skiers. Human Movement Science
Academic literature review
Skovereng, Knut; Ettema, Gertjan; Beekvelt, Mireille Van. (2017) The effect of cadence on shank muscle oxygen consumption and deoxygenation in relation to joint specific power and cycling kinematics. PLOS ONE
Academic article
Dahl, Christine; Sandbakk, Øyvind; Danielsen, Jørgen; Ettema, Gertjan. (2017) The role of power fluctuations in the preference of diagonal vs. double poling sub-technique at different incline-speed combinations in elite cross-country skiers. Frontiers in Physiology
Academic article
Vandbakk, Kristine; Welde, Boye; Kruken, Andrea Hovstein; Baumgart, Julia Kathrin; Ettema, Gertjan; Karlsen, Trine; Sandbakk, Øyvind. (2017) Effects of upper-body sprint-interval training on strength and endurance capacities in female cross-country skiers. PLOS ONE
Academic article

2016

Ettema, Gerardus Johannes C; Hooiveld, Jo; Braaten, Steinar; Boobert, Maarten. (2016) How do elite ski jumpers handle the dynamic conditions in imitation jumps?. Journal of Sports Sciences
Academic article
Luchsinger, Harri; Sandbakk, Øyvind; Schubert, Michael; Ettema, Gerardus Johannes C; Baumeister, Jochen. (2016) A Comparison of Frontal Theta Activity During Shooting among Biathletes and Cross-Country Skiers before and after Vigorous Exercise. PLOS ONE
Academic article
Østerås, Sindre; Welde, Boye; Danielsen, Jørgen; van den Tillaar, Roland; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2016) Contribution of upper-body strength, body composition, and maximal oxygen uptake to predict double poling power and overall performance in female cross-country skiers. Journal of Strength and Conditioning Research
Academic article
Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gertjan. (2016) Mechanical energy and work in treadmill double poling on roller skis.
Academic chapter
Aune, Tore Kristian; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2016) Bilateral asymmetry in upper extremities is More pronounced in distal compared to proximal joints. Journal of Motor Behavior
Academic article
Dalen, Terje; Ingebrigtsen, Jørgen; Ettema, Gerardus Johannes C; Hjelde, Geir Håvard; Wisløff, Ulrik. (2016) Player load, acceleration, and deceleration during forty-five competitive matches of elite soccer. Journal of Strength and Conditioning Research
Academic article
Sandbakk, Øyvind; Rasdal, Vegard; Bråten, Steinar; Moen, Frode; Ettema, Gerardus Johannes C. (2016) How do world-class Nordic Combined athletes differ from specialized cross-country skiers and ski jumpers in sport-specific capacity and training characteristics?. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Bolger, Conor; Sandbakk, Øyvind; Ettema, Gertjan; Federolf, Peter Andreas. (2016) How hinge positioning in cross-country ski bindings affect exercise efficiency, cycle characteristics and muscle coordination during submaximal roller skiing. PLOS ONE
Academic article
Ettema, Gerardus Johannes C; McGhie, David; Danielsen, Jørgen; Sandbakk, Øyvind; Haugen, Thomas André. (2016) On the existence of step-to-step breakpoint transitions in accelerated sprinting. PLOS ONE
Academic article
Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Munkebye, Øyvind; Ettema, Gertjan; Sandbakk, Øyvind. (2016) Heart rate profiles, external work rate and kinematics when ski skating on varying terrain during low-, moderate-, and high-intensity endurance training. University of Salzburg
Anthology
Skovereng, Knut; Ettema, Gerardus Johannes C; Beekvelt, Mireille Van. (2016) Oxygenation, local muscle oxygen consumption and joint specific power in cycling: the effect of cadence at a constant external work rate. European Journal of Applied Physiology
Academic article

2015

Danielsen, Jørgen; Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2015) Mechanical Energy and Propulsion in Ergometer Double Poling by Cross-country Skiers. Medicine & Science in Sports & Exercise
Academic article
Skovereng, Knut; Ettema, Gerardus Johannes C; Beekvelt, Mireille Van. (2015) Local muscle oxygen consumption related to external and joint specific power. Human Movement Science
Academic article
Bucher, Elias; Danielsen, Jørgen; Hegge, Ann Magdalen; Faude, Oliver; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2015) Technique differences between male and female cross-country skiers while whole body, upper body and arm poling on a ski ergometer.
Academic chapter
Sandbakk, Øyvind; Skålvik, Tommy Fredriksen; Spencer, Matthew; Beekvelt, Mireille Van; Welde, Boye; Hegge, Ann Magdalen; Gjøvaag, Terje; Ettema, Gerardus Johannes C. (2015) The physiological responses to repeated upper-body sprint exercise in highly trained athletes. European Journal of Applied Physiology
Academic article
Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Faude, Oliver; Holmberg, Hans-Christer; Sandbakk, Øyvind. (2015) Gender differences in power production, energetic capacity and efficiency of elite cross-country skiers during whole-body, upper-body, and arm poling. European Journal of Applied Physiology
Academic article

2014

Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; Koning, Jos de; Rognstad, Asgeir Bakken; Hoset, Martin; Sandbakk, Øyvind. (2014) The effects of the arm swing on biomechanical and physiological aspects of roller ski skating. Human Movement Science
Academic article
Grasaas, Erik; Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) The effects of poling on physiological, kinematic and kinetic responses in roller ski skating. European Journal of Applied Physiology
Academic article
Sandbakk, Øyvind; Hansen, Mads; Ettema, Gerardus Johannes C; Rønnestad, Bent. (2014) The effects of heavy upper-body strength training on ice sledge hockey sprint abilities in world class players. Human Movement Science
Academic article
Sandbakk, Øyvind; Leirdal, Stig; Ettema, Gerardus Johannes C. (2014) The physiological and biomechanical differences between double poling and G3 skating in world class cross-country skiers. European Journal of Applied Physiology
Academic article
Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Joint-specific power contribution at increasing double poling intensities.
Academic chapter
Sandbakk, Øyvind; Spencer, Matthew; Ettema, Gerardus Johannes C; Bucher, Silvana Andrea; Skovereng, Knut; Welde, Boye. (2014) The Physiology and Biomechanics of Upper-Body Repeated Sprints in Ice Sledge Hockey. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Grasaas, Christina Åsan; Ettema, Gertja; Hegge, Ann Magdalen H. S.; Skovereng, Knut; Sandbakk, Øyvind. (2014) Changes in Technique and Efficiency After High-Intensity Exercise in Cross-Country Skiers. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Skovereng, Knut; Beekvelt, Mireille Van; Ettema, Gerardus Johannes C. (2014) The effect of cadence on hip, knee and ankle contribution during cycling exercise.
Academic chapter
Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Comparison of arm, upper body and whole body double poling in female and male cross-country skiers.
Academic chapter
Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Efficiency in endurance exercise: efficiency of what.
Academic chapter
Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2014) The role of gross mechanical efficiency in endurance sports.
Academic chapter

2013

McGhie, David Caley Ruud; Ettema, Gerardus Johannes C. (2013) Biomechanical analysis of traction at the shoe-surface interface on third-generation artificial turf. Sports Engineering
Academic article
Hoset, Martin; Rognstad, Asgeir Bakken; Rølvåg, Terje; Ettema, Gertja; Sandbakk, Øyvind. (2013) Construction of an instrumented roller ski and validation of three-dimensional forces in the skating technique. Sports Engineering
Academic article
Skovereng, Knut; Ettema, Gertja; Beekvelt, Mireille V.; Sandbakk, Øyvind. (2013) Pulmonary oxygen consumption and oxygenation of upper-body muscles during isolated upper body poling at different exercise intensities.
Academic chapter
Ettema, Gertja; Skålvik, Tommy; Spencer, Matthew; Sandbakk, Øyvind. (2013) Performance and coordination in repeated sprint exercise for the upper body.
Academic chapter
Sandbakk, Øyvind; Hansen, Mads; Rønnestad, Bent; Ettema, Gertjan. (2013) Effects of heavy strength training on upper-body strength, power and sprint performance in ice sledge hockey.
Academic chapter
Bardal, Ellen Marie; Olsen, Trond Vegar; Ettema, Gerardus Johannes C; Mork, Paul Jarle. (2013) Metabolic rate, cardiac response, and aerobic capacity in fibromyalgia: A case-control study. Scandinavian Journal of Rheumatology
Academic article
van den Tillaar, Roland; Ettema, Gertja. (2013) A Comparison of Muscle Activity in Concentric and Counter Movement Maximum Bench Press. The Journal of Human Kinetics
Academic article
Aune, Tore Kristian; Aune, Morten Andreas; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2013) Comparison of bilateral force deficit in proximal and distal joints in upper extremities. Human Movement Science
Academic article
Sandbakk, Øyvind; Hegge, Ann Magdalen H. S.; Ettema, Gertjan. (2013) The role of incline, performance level and gender on the gross mechanical efficiency of roller ski skating. Frontiers in Physiology
Academic article
Leirdal, Stig; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2013) Effects of frequency on gross efficiency and performance in roller ski skating. Scandinavian Journal of Medicine & Science in Sports
Academic article
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2013) Effects of Intensity and Duration in Aerobic High-Intensity Interval Training in Highly Trained Junior Cross-Country Skiers. Journal of Strength and Conditioning Research
Academic article
McGhie, David; Ettema, Gertja. (2013) On the "trench effect" theory: A biomechanical analysis of the relationship between traction and shoe orientation on third-generation artificial turf. Footwear Science
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2013) The physiological and biomechanical contributions of poling to roller ski skating. European Journal of Applied Physiology
Academic article
Skovereng, Knut; Ettema, Gerardus Johannes C; Welde, Boye; Sandbakk, Øyvind. (2013) On the relationship between upper-body strength, power and sprint performance in ice sledge hockey. Journal of Strength and Conditioning Research
Academic article

2012

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Gender differences in endurance performance by elite cross-country skiers are influenced by the contribution from poling. Scandinavian Journal of Medicine & Science in Sports
Academic article
Supej, Matej; Oggiano, Luca; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Differences in air drag among elite male alpine skiers.
Academic chapter
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) The influence of incline and speed on work rate, gross efficiency and kinematics of roller ski skating. European Journal of Applied Physiology
Academic article
van den Tillaar, Roland; Sæterbakken, Atle; Ettema, Gerardus Johannes C. (2012) Is the occurrence of the sticking region the result of diminishing potentiation in bench press?. Journal of Sports Sciences
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Holmberg, Hans-Christer. (2012) Gender differences in the physiological responses and kinematic behaviour of elite sprint cross-country skiers. European Journal of Applied Physiology
Academic article
Supej, Matej; Sætran, Lars Roar; Oggiano, Luca; Ettema, Gerardus Johannes C; Sarabon, N; Nemec, B; Holmberg, H.C.. (2012) Aerodynamic drag is not the major determinant of performance during giant slalom skiing at the elite level. Scandinavian Journal of Medicine & Science in Sports
Academic article
Andersson, E.; Stöggl, T; Pellegrini, B.; Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Biomechanical analysis of the herringbone technique as employed by elite cross-country skiers. Scandinavian Journal of Medicine & Science in Sports
Academic article
McGhie, David; Ettema, Gerardus Johannes C. (2012) Biomechanical analysis of traction at the shoe-surface interface on third generation artificial turf. Procedia Engineering
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2012) Cycling.
Encyclopedia chapter
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Skovereng, Knut; Welde, Boye; Ettema, Gerardus Johannes C. (2012) The Physiology of World Class Sledge Ice-Hockey.
Academic chapter
McGhie, David; Ettema, Gerardus Johannes C. (2012) Biomechanical Analysis of Surface-Athlete Impacts on Third-Generation Artificial Turf. American Journal of Sports Medicine
Academic article
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2012) Effects of intensity and duration in aerobic high-intensity interval training.
Academic chapter
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) Efficiency in cross-country skiing. A brief review.
Academic chapter
Skovereng, Knut; Ettema, Gerardus Johannes C; Welde, Boye; Sandbakk, Øyvind. (2012) Relationships between Upper-Body Maximal Strength, Power and Sprint Performance in Sledge Ice-Hockey.
Academic chapter
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, HC. (2012) The contribution from poling increases gender differences in elite cross-country skiers.
Academic chapter

2011

Sandbakk, Øyvind; Holmberg, Hans-Christer; Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) The physiology of world-class sprint skiers. Scandinavian Journal of Medicine & Science in Sports
Academic article
McGhie, David; Ettema, Gerardus Johannes C. (2011) The effect of cadence on timing of muscle activation and mechanical output in cycling: On the activation dynamics hypothesis. Journal of Electromyography & Kinesiology
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) The relationship between cadence, pedaling technique and gross efficiency in cycling. European Journal of Applied Physiology
Academic article
Sommervoll, Yngve; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2011) Effects of age, task, and frequency on variability of finger tapping. Perceptual and Motor Skills
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2011) A comparison of kinematics between overarm throwing with 20% underweight, regular, and 20% overweight balls. Journal of Applied Biomechanics
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Jakobsen, Vidar Eivind; Holmberg, Hans-Christer. (2011) Analysis of a sprint ski race and associated laboratory determinants of world-class performance. European Journal of Applied Physiology
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) Pedaling Technique and Energy Cost in Cycling. Medicine & Science in Sports & Exercise
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2011) Effects of Speed and Slope on Ski Skating Efficiency and Kinematics. Medicine & Science in Sports & Exercise
Conference abstract

2010

Sandbakk, Øyvind; Holmberg, Hans-Christer; Leirdal, Stig; Ettema, Gerardus Johannes C. (2010) Metabolic rate and gross efficiency at high work rates in world class and national level sprint skiers. European Journal of Applied Physiology
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2010) The "sticking period" in a maximum bench press. Journal of Sports Sciences
Academic article
Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2010) The effect of gender and training experience on body segments' contributions in overarm throwing. International Journal of Sport Psychology
Conference abstract

2009

Ettema, Gerardus Johannes C; Lorås, Håvard Wuttudal; Leirdal, Stig. (2009) The effects of cycling cadence on the phases of joint power, crank power, force and force effectiveness. Journal of Electromyography & Kinesiology
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) Freely chosen pedal rate during free cycling on a roller and ergometer cycling. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C; Lorås, Håvard Wuttudal. (2009) Efficiency in cycling: a review. European Journal of Applied Physiology
Academic literature review
Lorås, Håvard Wuttudal; Ettema, Gerardus Johannes C; Leirdal, Stig. (2009) The Muscle Force Component in Pedaling Retains Constant Direction Across Pedaling Rates. Journal of Applied Biomechanics
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) Is there a proximal-to-distal sequence in overarm throwing in team handball?. Journal of Sports Sciences
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) A comparison of overarm throwing with the dominant and nondominant arm in experienced team handball players. Perceptual and Motor Skills
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) A Comparison of Successful and Unsuccessful Attempts in Maximal Bench Pressing. Medicine & Science in Sports & Exercise
Academic article

2008

Ettema, Gerardus Johannes C; Gløsen, Tommy; van den Tillaar, Roland. (2008) Effect of specific strength training on overarm throwing performance. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Leirdal, Stig; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2008) Coordination Specificity in Strength and Power Training. International Journal of Sports Medicine (IJSM)
Academic article
Oggiano, Luca; Sætran, Lars Roar; Leirdal, Stig; Ettema, Gerardus Johannes C. (2008) Aerodynamic optimization and energy saving of cycling postures for international elite level cyclists.
Academic chapter
Aune, Tore Kristian; Ingvaldsen, Rolf Petter; Ettema, Gerardus Johannes C. (2008) Effect of physical fatigue on motor control at different skill levels. Perceptual and Motor Skills
Academic article

2007

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2007) A three-dimensional analysis of overarm throwing in experienced handball players. Journal of Applied Biomechanics
Academic article
Ettema, Gerardus Johannes C; Hooiveld, Jo; Bråten, Steinar; Bobbert, Maarten F. (2007) The possible use of horizontal propulsion in imitation ski jumps.
Academic chapter
Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2007) The effect of rate of force development on maximal force production: acute and training-related aspects. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C; Bråten, Steinar. (2007) On the role of the location of centre of mass in ski jumping.
Academic chapter

2006

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) A comparison of kinematics between novices and experts in overarm throwing under influence of type of instruction. Perceptual and Motor Skills
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) The sticking point in bench pressing.
Academic chapter
Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) A comparison of male throwing athletes and unskilled males when performing an overarm throwing task.
Academic chapter
Ettema, Gerardus Johannes C. (2006) On the proximal-distal sequence in explosive actions: the role of transfer of momentum.
Academic chapter
Kristensen, Geir Olav; van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) Velocity Specificity in Early-Phase Sprint Training. Journal of Strength and Conditioning Research
Academic article
Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) Effects of gender and training experience on kinematical and temporal aspects of overarm throwing technique. Norges Teknisk-Naturvitenskapelige Universitet, Program for Bevegelsesvitenskap
Master thesis
Leirdal, Stig; Sætran, Lars Roar; Roeleveld, Karin; Vereijken, Beatrix; Bråten, Steinar; Bråten, Steinar; Løset, Sveinung; Holtermann, Andreas; Ettema, Gerardus Johannes C. (2006) Effects of Body Position on Slide Boarding Performance by Cross-Country Skiers. Medicine & Science in Sports & Exercise
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) A comparison of performance and kinematics in throwing with the dominant and non-dominant arm in handball players.
Academic chapter
Ettema, Gerardus Johannes C; Bråten, Steinar. (2006) On the role of the location of centre of mass in ski jumping.
Academic chapter

2005

Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2005) Changes in agonist EMG activation level during MVC cannot explain early strength improvement. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C; Braten, S; Bobbert, MF. (2005) Dynamics of the in-run in ski jumping: A simulation study. Journal of Applied Biomechanics
Academic article
Ettema, Gerardus Johannes C; Taylor, E; North, JD; Kippers, V. (2005) Muscle synergies at the elbow in static and oscillating isometric torque tasks with dual degrees of freedom. Motor Control
Academic article

2004

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2004) A force velocity relationship and coordination patterns in overarm throwing. Journal of Sports Science and Medicine (JSSM)
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
Academic article
Tillaar, R van den; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
Academic article

2003

Leirdal, Stig; Ettema, Gerardus Johannes C. (2003) Utholdenhet: Energifrigjøring, prestasjonsfaktorer, trening, tilpasninger og testing. Pensum Topptrenerstudiet Olympiatoppen-NTNU. [Mangler utgivernavn]
Working paper
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2003) Influence of instruction on velocity and accuracy of overarm throwing. Perceptual and Motor Skills
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2003) Effects of instruction, emphasizing on velocity, accuracy or both on the performance and kinematics in overarm throwing. Perceptual and Motor Skills
Academic article
Tillaar, R van den; Ettema, Gerardus Johannes C. (2003) Instructions emphasizing velocity, accuracy, or both in performance and kinematics of overarm throwing by experienced team handball players. Perceptual and Motor Skills
Academic article

2002

Toussaint, Gerthory; Pedersen, Atle; Oterhals, Geir; Fiskvik, Anne Margrete; Ettema, Gerardus Johannes C; Bongaardt, Robert; Bakka, Egil; Audsen, Kjetil; Vereijken, Beatrix; Hokland, Jørn. (2002) La det swinge! Om kropp og bevegelse.
Academic chapter
Ettema, Gerardus Johannes C. (2002) Effects of contraction history on control and stability in explosive actions. Journal of Electromyography & Kinesiology
Academic article

2001

Ettema, Gerardus Johannes C. (2001) Muscle efficiency: the controversial role of elasticity and mechanical energy conversion in stretch-shortening cycles. European Journal of Applied Physiology
Academic article

2000

Ettema, Gerardus Johannes C. (2000) Physiological and biomechanical constraints: muscle mechanics & motor action. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (2000) Biomechanics: classic mechanics applied to the musculoskeletal system in a functional setting. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (2000) Motor behaviour: notes on neuro-physiology. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C; Meijer, Kenneth. (2000) Muscle contraction history: modified Hill versus an exponential decay model. Biological cybernetics
Academic article

1999

Ettema, Gerardus Johannes C. (1999) Human movement from a biological perspective:differentiation of subsystems and biological organisation. Corpus, Psyche et Societas
Academic article
Ettema, Gerardus Johannes C; Roeleveld, Karin; van den Tillaar, Roland. (1999) Biologi i Grunnfag Idrett (IDR105) på internet. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (1999) Modelling skeletal muscle-tendon units as actuators in motor behaviour: morphological aspects. Corpus, Psyche et Societas
Academic article

1998

Ettema, Gerardus Johannes C; Forwood, Mark R; Goh, Judith TW. (1998) A new method to measure elastic properties of plastic-viscoelastic connective tissue. Medical Engineering and Physics
Academic article
Ettema, Gerardus Johannes C; Styles, George; Kippers, Vaughan. (1998) The moment arms of 23 muscles of the upper limb in different elbow and forearm positions. Human Movement Science
Academic article
Walshe, Andrew; Wilson, Greg J; Ettema, Gerardus Johannes C. (1998) Stretch shorten cycle as compared to isometric preload: contributions to enhanced muscular performance. Journal of applied physiology
Academic article

1997

Ettema, Gerardus Johannes C. (1997) The Human Musculoskeletal System. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (1997) Mechanical behaviour of rat skeletal muscle during fatiguing stretch-shorten cycles. Experimental Physiology
Academic article
Ettema, Gerardus Johannes C. (1997) Muscle length and force generation in bipedal and quadrupedal animals in relation to joint ankles and locomotor behaviour. Anatomical Record
Academic article
Ettema, Gerardus Johannes C. (1997) Mechanical behaviour of rat skeletal muscle during fatiguing stretch-shorten cycles. Experimental Physiology
Academic article
Ettema, Gerardus Johannes C. (1997) Gastrocnemius muscle length in relation to knee and ankle joint angles: verification of a geometric model and some applications. Anatomical Record
Academic article

1996

Ettema, Gerardus Johannes C. (1996) Innovations in teaching musculoskeletal anatomy. [Mangler utgivernavn]
Research report
Ettema, Gerardus Johannes C; Kippers, Vaughan. (1996) Proceedings of the 1996 Conference of the anatomical society of Australia and New Zealand. [Mangler utgivernavn]
Research report
Ettema, Gerardus Johannes C. (1996) Mechanical efficiency and efficiency of storage and release of series elastic energy in skeletal muscle during stretch-shorten cycles. Journal of Experimental Biology
Academic article
Ettema, Gerardus Johannes C. (1996) Contractile behaviour in rat gastrocnemius muscle during small amplitude sine wave perturbations. Journal of Biomechanics
Academic article
Ettema, Gerardus Johannes C. (1996) Elastic - and length-force characteristics of the gastrocnemius of the hopping mouse (notomys alexis) and the rat (rattus norvegicus). Journal of Experimental Biology
Academic article

Journal publications

Severin, Anna Cecilia; Baumgart, Julia Kathrin; Kocbach, Jan Martin; Ettema, Gerardus Johannes Cornelis. (2026) Differences in speed, trunk range of motion, and cycle kinematics between Para-Nordic sit-skiing classes across inclines. Journal of Sports Sciences
Academic article
Ettema, Gerardus Johannes Cornelis; Danielsen, Jørgen; Øvstehage, Vemund; Skovereng, Knut. (2025) On the estimation of total muscle work done in human walking. Journal of Experimental Biology
Academic article
Almquist, Nicki Winfield; Ettema, Gertjan; Hopker, James; Sandbakk, Øyvind; Rønnestad, Bent. (2019) The Effect of 30-Second Sprints During Prolonged Exercise on Gross Efficiency, Electromyography, and Pedaling Technique in Elite Cyclists. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Ettema, Gerardus Johannes C; Lorås, Håvard Wuttudal; Leirdal, Stig. (2009) The effects of cycling cadence on the phases of joint power, crank power, force and force effectiveness. Journal of Electromyography & Kinesiology
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) Freely chosen pedal rate during free cycling on a roller and ergometer cycling. European Journal of Applied Physiology
Academic article
Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; Koning, Jos de; Rognstad, Asgeir Bakken; Hoset, Martin; Sandbakk, Øyvind. (2014) The effects of the arm swing on biomechanical and physiological aspects of roller ski skating. Human Movement Science
Academic article
Danielsen, Jørgen; Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2015) Mechanical Energy and Propulsion in Ergometer Double Poling by Cross-country Skiers. Medicine & Science in Sports & Exercise
Academic article
Skovereng, Knut; Ettema, Gerardus Johannes C; Beekvelt, Mireille Van. (2015) Local muscle oxygen consumption related to external and joint specific power. Human Movement Science
Academic article
Severin, Cecilia; Danielsen, Jørgen; Erichsen, Jorgen Falck; Eikevåg, Sindre Wold; Steinert, Martin; Ettema, Gertjan; Baumgart, Julia Kathrin. (2021) Case Report: Adjusting Seat and Backrest Angle Improves Performance in an Elite Paralympic Rower. Frontiers in Sports and Active Living
Academic article
Ettema, Gerardus Johannes C; Lorås, Håvard Wuttudal. (2009) Efficiency in cycling: a review. European Journal of Applied Physiology
Academic literature review
Grasaas, Erik; Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) The effects of poling on physiological, kinematic and kinetic responses in roller ski skating. European Journal of Applied Physiology
Academic article
Sandbakk, Øyvind; Holmberg, Hans-Christer; Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) The physiology of world-class sprint skiers. Scandinavian Journal of Medicine & Science in Sports
Academic article
McGhie, David; Ettema, Gerardus Johannes C. (2011) The effect of cadence on timing of muscle activation and mechanical output in cycling: On the activation dynamics hypothesis. Journal of Electromyography & Kinesiology
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) The relationship between cadence, pedaling technique and gross efficiency in cycling. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C. (1999) Human movement from a biological perspective:differentiation of subsystems and biological organisation. Corpus, Psyche et Societas
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) A comparison of kinematics between novices and experts in overarm throwing under influence of type of instruction. Perceptual and Motor Skills
Academic article
Haugnes, Pål; Torvik, Per Øyvind; Ettema, Gertjan; Kocbach, Jan; Sandbakk, Øyvind. (2018) The Effect of Maximal Speed Ability, Pacing Strategy and Technique on the Finish-Sprint of a Sprint Cross-Country Skiing Competition. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Sandbakk, Øyvind; Haugen, Thomas André; Ettema, Gerardus Johannes C. (2021) The influence of exercise modality on training load management. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Sandbakk, Øyvind; Hansen, Mads; Ettema, Gerardus Johannes C; Rønnestad, Bent. (2014) The effects of heavy upper-body strength training on ice sledge hockey sprint abilities in world class players. Human Movement Science
Academic article
McGhie, David Caley Ruud; Ettema, Gerardus Johannes C. (2013) Biomechanical analysis of traction at the shoe-surface interface on third-generation artificial turf. Sports Engineering
Academic article
Haugen, Thomas André; McGhie, David; Ettema, Gertjan. (2019) Sprint running: from fundamental mechanics to practice -a review. European Journal of Applied Physiology
Academic literature review
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David Caley Ruud; Ettema, Gertjan. (2021) Mechanical energy and propulsion mechanics in roller-skiing double-poling at increasing speeds. PLOS ONE
Academic article
Luchsinger, Harri; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2019) The Contribution From Cross-Country Skiing and Shooting Variables on Performance Level and Sex Differences in Biathlon World Cup Individual Races. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Aasvold, Lorents Ola; Ettema, Gertjan; Skovereng, Knut. (2019) Joint specific power production in cycling: The effect of cadence and intensity. PLOS ONE
Academic article
Skovereng, Knut; Sandbakk, Øyvind Bucher; Ettema, Gertjan; Noordhof, Dionne Adriana; Seeberg, Trine Margrethe; Kocbach, Jan Martin; Danielsen, Jørgen. (2025) The effect of work rate on metabolic and mechanical intensity measures across skating style sub-techniques in cross-country skiing. European Journal of Sport Science (EJSS)
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Gender differences in endurance performance by elite cross-country skiers are influenced by the contribution from poling. Scandinavian Journal of Medicine & Science in Sports
Academic article
Hoset, Martin; Rognstad, Asgeir Bakken; Rølvåg, Terje; Ettema, Gertja; Sandbakk, Øyvind. (2013) Construction of an instrumented roller ski and validation of three-dimensional forces in the skating technique. Sports Engineering
Academic article
Ettema, Gerardus Johannes C; Hooiveld, Jo; Braaten, Steinar; Boobert, Maarten. (2016) How do elite ski jumpers handle the dynamic conditions in imitation jumps?. Journal of Sports Sciences
Academic article
Kristensen, Geir Olav; van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) Velocity Specificity in Early-Phase Sprint Training. Journal of Strength and Conditioning Research
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) The influence of incline and speed on work rate, gross efficiency and kinematics of roller ski skating. European Journal of Applied Physiology
Academic article
Sommervoll, Yngve; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2011) Effects of age, task, and frequency on variability of finger tapping. Perceptual and Motor Skills
Academic article
Haugen, Thomas André; Danielsen, Jørgen; Alnes, Leif Olav; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2018) On the importance of “front-side mechanics” in athletics sprinting. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Leirdal, Stig; Sætran, Lars Roar; Roeleveld, Karin; Vereijken, Beatrix; Bråten, Steinar; Bråten, Steinar; Løset, Sveinung; Holtermann, Andreas; Ettema, Gerardus Johannes C. (2006) Effects of Body Position on Slide Boarding Performance by Cross-Country Skiers. Medicine & Science in Sports & Exercise
Academic article
Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2005) Changes in agonist EMG activation level during MVC cannot explain early strength improvement. European Journal of Applied Physiology
Academic article
van den Tillaar, Roland; Sæterbakken, Atle; Ettema, Gerardus Johannes C. (2012) Is the occurrence of the sticking region the result of diminishing potentiation in bench press?. Journal of Sports Sciences
Academic article
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David; Ettema, Gertjan. (2019) Mechanical energetics and dynamics of uphill double-poling on roller-skis at different incline-speed combinations. PLOS ONE
Academic article
Dalen, Terje; Aune, Tore Kristian; Hjelde, Geir Håvard; Ettema, Gertjan; Sandbakk, Øyvind; McGhie, David. (2020) Player load in male elite soccer: Comparisons of patterns between matches and positions. PLOS ONE
Academic article
McGhie, David; Østerås, Sindre; Ettema, Gertjan; Paulsen, Gøran; Sandbakk, Øyvind. (2020) Strength Determinants of Jump Height in the Jump Throw Movement in Women Handball Players. Journal of Strength and Conditioning Research
Academic article
Luchsinger, Harri; Sandbakk, Øyvind; Schubert, Michael; Ettema, Gerardus Johannes C; Baumeister, Jochen. (2016) A Comparison of Frontal Theta Activity During Shooting among Biathletes and Cross-Country Skiers before and after Vigorous Exercise. PLOS ONE
Academic article
Haugnes, Pål; Kocbach, Jan Martin; Noordhof, Dionne Adriana; Talsnes, Rune Kjøsen; Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) The influence of tactical positioning on performance in sprint cross-country skiing. PLOS ONE
Academic article
Skovereng, Knut; Aasvold, Lorents Ola; Ettema, Gertjan. (2020) On the effect of changing handgrip position on joint specific power and cycling kinematics in recreational and professional cyclists. PLOS ONE
Academic article
Ettema, Gertjan; Haug, Aurora Aasrud; Ludvigsen, Tonje Pedersen; Danielsen, Jørgen. (2022) The role of stroke rate and intensity on rowing technique. Sports Biomechanics
Academic article
Ettema, Gertjan. (2023) The Force–Velocity Profiling Concept for Sprint Running Is a Dead End. International Journal of Sports Physiology and Performance (IJSPP)
Academic literature review
Østerås, Sindre; Welde, Boye; Danielsen, Jørgen; van den Tillaar, Roland; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2016) Contribution of upper-body strength, body composition, and maximal oxygen uptake to predict double poling power and overall performance in female cross-country skiers. Journal of Strength and Conditioning Research
Academic article
Sandbakk, Øyvind; Holmberg, Hans-Christer; Leirdal, Stig; Ettema, Gerardus Johannes C. (2010) Metabolic rate and gross efficiency at high work rates in world class and national level sprint skiers. European Journal of Applied Physiology
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2007) A three-dimensional analysis of overarm throwing in experienced handball players. Journal of Applied Biomechanics
Academic article
Haugen, Thomas; Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2017) Kinematic stride cycle asymmetry is not associated with sprint performance and injury prevalence in athletic sprinters. Scandinavian Journal of Medicine & Science in Sports
Academic article
Lorås, Håvard Wuttudal; Ettema, Gerardus Johannes C; Leirdal, Stig. (2009) The Muscle Force Component in Pedaling Retains Constant Direction Across Pedaling Rates. Journal of Applied Biomechanics
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2004) A force velocity relationship and coordination patterns in overarm throwing. Journal of Sports Science and Medicine (JSSM)
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C. (1997) Mechanical behaviour of rat skeletal muscle during fatiguing stretch-shorten cycles. Experimental Physiology
Academic article
Ettema, Gerardus Johannes C. (1997) Muscle length and force generation in bipedal and quadrupedal animals in relation to joint ankles and locomotor behaviour. Anatomical Record
Academic article
Rasdal, Vegard; Fudel, Ronny; Kocbach, Jan; Moen, Frode; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Association between laboratory capacities and world-cup performance in Nordic combined. PLOS ONE
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) Is there a proximal-to-distal sequence in overarm throwing in team handball?. Journal of Sports Sciences
Academic article
Hansen, Linda Marie; Sandbakk, Øyvind; Ettema, Gertjan; Baumgart, Julia Kathrin. (2021) Upper- vs. Lower-Body Exercise Performance in Female and Male Cross-Country Skiers. Frontiers in Sports and Active Living
Academic article
Ettema, Gerardus Johannes C; Gløsen, Tommy; van den Tillaar, Roland. (2008) Effect of specific strength training on overarm throwing performance. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Sandbakk, Øyvind; Leirdal, Stig; Ettema, Gerardus Johannes C. (2014) The physiological and biomechanical differences between double poling and G3 skating in world class cross-country skiers. European Journal of Applied Physiology
Academic article
Bardal, Ellen Marie; Olsen, Trond Vegar; Ettema, Gerardus Johannes C; Mork, Paul Jarle. (2013) Metabolic rate, cardiac response, and aerobic capacity in fibromyalgia: A case-control study. Scandinavian Journal of Rheumatology
Academic article
Elfmark, Ola; Ettema, Gertjan; Gilgien, Matthias. (2022) Assessment of the steady glide phase in ski jumping. Journal of Biomechanics
Academic article
van den Tillaar, Roland; Ettema, Gertja. (2013) A Comparison of Muscle Activity in Concentric and Counter Movement Maximum Bench Press. The Journal of Human Kinetics
Academic article
Ettema, Gerardus Johannes C; Braten, S; Bobbert, MF. (2005) Dynamics of the in-run in ski jumping: A simulation study. Journal of Applied Biomechanics
Academic article
Aune, Tore Kristian; Aune, Morten Andreas; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2013) Comparison of bilateral force deficit in proximal and distal joints in upper extremities. Human Movement Science
Academic article
Ettema, Gerardus Johannes C; Taylor, E; North, JD; Kippers, V. (2005) Muscle synergies at the elbow in static and oscillating isometric torque tasks with dual degrees of freedom. Motor Control
Academic article
Aune, Tore Kristian; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2016) Bilateral asymmetry in upper extremities is More pronounced in distal compared to proximal joints. Journal of Motor Behavior
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2010) The "sticking period" in a maximum bench press. Journal of Sports Sciences
Academic article
Loland, Sigmund; Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) The study of movement skills in sports: toward an integrative approach. Frontiers in Psychology
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Holmberg, Hans-Christer. (2012) Gender differences in the physiological responses and kinematic behaviour of elite sprint cross-country skiers. European Journal of Applied Physiology
Academic article
Supej, Matej; Sætran, Lars Roar; Oggiano, Luca; Ettema, Gerardus Johannes C; Sarabon, N; Nemec, B; Holmberg, H.C.. (2012) Aerodynamic drag is not the major determinant of performance during giant slalom skiing at the elite level. Scandinavian Journal of Medicine & Science in Sports
Academic article
Leirdal, Stig; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2008) Coordination Specificity in Strength and Power Training. International Journal of Sports Medicine (IJSM)
Academic article
Sandbakk, Øyvind; Skålvik, Tommy Fredriksen; Spencer, Matthew; Beekvelt, Mireille Van; Welde, Boye; Hegge, Ann Magdalen; Gjøvaag, Terje; Ettema, Gerardus Johannes C. (2015) The physiological responses to repeated upper-body sprint exercise in highly trained athletes. European Journal of Applied Physiology
Academic article
Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2007) The effect of rate of force development on maximal force production: acute and training-related aspects. European Journal of Applied Physiology
Academic article
Bolger, Conor; Bessone, Veronica; Federolf, Peter Andreas; Ettema, Gertjan; Sandbakk, Øyvind. (2018) The influence of increased distal loading on metabolic cost, efficiency, and kinematics of roller ski skating. PLOS ONE
Academic article
Ettema, Gertjan; Kveli, Espen; Øksnes, Magne; Sandbakk, Øyvind. (2017) The role of speed and incline in the spontaneous choice of technique in classical roller-skiing. Human Movement Science
Academic article
Sandbakk, Øyvind; Haugen, Thomas André; Ettema, Gertjan. (2021) The influence of exercise modality on training load management. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Elfmark, Ola; Ettema, Gertjan; Jølstad, Petter Andre; Gilgien, Matthias. (2022) Kinematic Determination of the Aerial Phase in Ski Jumping. Sensors
Academic article
Baumgart, Julia Kathrin; Ettema, Gertjan; Griggs, Katy E.; Goosey-Tolfrey, Victoria Louise; Leicht, Christof Andreas. (2021) A Reappraisal of Ventilatory Thresholds in Wheelchair Athletes With a Spinal Cord Injury: Do They Really Exist?. Frontiers in Physiology
Academic article
Andersson, E.; Stöggl, T; Pellegrini, B.; Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Biomechanical analysis of the herringbone technique as employed by elite cross-country skiers. Scandinavian Journal of Medicine & Science in Sports
Academic article
Haugnes, Pål; Kocbach, Jan; Talsnes, Rune Kjøsen; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind. (2022) The influence of race tactics for performance in the heats of an international sprint cross-country skiing competition. PLOS ONE
Academic article
Elfmark, Ola; Ettema, Gertjan. (2021) Aerodynamic investigation of the inrun position in Ski jumping. Sports Biomechanics
Academic article
Ettema, Gerardus Johannes C. (1999) Modelling skeletal muscle-tendon units as actuators in motor behaviour: morphological aspects. Corpus, Psyche et Societas
Academic article
Sandbakk, Øyvind; Spencer, Matthew; Ettema, Gerardus Johannes C; Bucher, Silvana Andrea; Skovereng, Knut; Welde, Boye. (2014) The Physiology and Biomechanics of Upper-Body Repeated Sprints in Ice Sledge Hockey. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
McGhie, David; Ettema, Gerardus Johannes C. (2012) Biomechanical analysis of traction at the shoe-surface interface on third generation artificial turf. Procedia Engineering
Academic article
Grasaas, Christina Åsan; Ettema, Gertja; Hegge, Ann Magdalen H. S.; Skovereng, Knut; Sandbakk, Øyvind. (2014) Changes in Technique and Efficiency After High-Intensity Exercise in Cross-Country Skiers. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Sandbakk, Øyvind; Hegge, Ann Magdalen H. S.; Ettema, Gertjan. (2013) The role of incline, performance level and gender on the gross mechanical efficiency of roller ski skating. Frontiers in Physiology
Academic article
Elfmark, Ola Anker; Sandbakk, Øyvind Bucher; Brevig, Magnus; Ettema, Gertjan. (2024) Performance and jump-to-jump development in the first female ski flying competition in history. Frontiers in Sports and Active Living
Academic article
Ettema, Gerardus Johannes C; Forwood, Mark R; Goh, Judith TW. (1998) A new method to measure elastic properties of plastic-viscoelastic connective tissue. Medical Engineering and Physics
Academic article
Ettema, Gerardus Johannes C; Styles, George; Kippers, Vaughan. (1998) The moment arms of 23 muscles of the upper limb in different elbow and forearm positions. Human Movement Science
Academic article
Baumgart, Julia Kathrin; Moes, Maaike; Skovereng, Knut; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Examination of gas exchange and blood lactate thresholds in Paralympic athletes during upper-body poling. PLOS ONE
Academic article
Dalen, Terje; Ingebrigtsen, Jørgen; Ettema, Gerardus Johannes C; Hjelde, Geir Håvard; Wisløff, Ulrik. (2016) Player load, acceleration, and deceleration during forty-five competitive matches of elite soccer. Journal of Strength and Conditioning Research
Academic article
Walshe, Andrew; Wilson, Greg J; Ettema, Gerardus Johannes C. (1998) Stretch shorten cycle as compared to isometric preload: contributions to enhanced muscular performance. Journal of applied physiology
Academic article
Ettema, Gerardus Johannes C. (2002) Effects of contraction history on control and stability in explosive actions. Journal of Electromyography & Kinesiology
Academic article
Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2010) The effect of gender and training experience on body segments' contributions in overarm throwing. International Journal of Sport Psychology
Conference abstract
Ettema, Gertjan; Skovereng, Knut; Ritman, Tobias Elvevold; Danielsen, Jørgen. (2023) The role of external power demand on the choice of technique in classic cross-country skiing. PLOS ONE
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2011) A comparison of kinematics between overarm throwing with 20% underweight, regular, and 20% overweight balls. Journal of Applied Biomechanics
Academic article
Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Ettema, Gertjan; Sandbakk, Øyvind. (2019) The Interval-Based Physiological and Mechanical Demands of Cross-Country Ski Training. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Leirdal, Stig; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2013) Effects of frequency on gross efficiency and performance in roller ski skating. Scandinavian Journal of Medicine & Science in Sports
Academic article
Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2017) The effect of exercise intensity on joint power and dynamics in ergometer double-poling performed by cross-country skiers. Human Movement Science
Academic literature review
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2003) Influence of instruction on velocity and accuracy of overarm throwing. Perceptual and Motor Skills
Academic article
Ettema, Gertjan; Braaten, Steinar; Danielsen, Jørgen; Fjeld, Birk Eirik. (2020) Imitation jumps in ski jumping: Technical execution and relationship to performance level. Journal of Sports Sciences
Academic article
Sandbakk, Øyvind; Rasdal, Vegard; Bråten, Steinar; Moen, Frode; Ettema, Gerardus Johannes C. (2016) How do world-class Nordic Combined athletes differ from specialized cross-country skiers and ski jumpers in sport-specific capacity and training characteristics?. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Aune, Tore Kristian; Ingvaldsen, Rolf Petter; Ettema, Gerardus Johannes C. (2008) Effect of physical fatigue on motor control at different skill levels. Perceptual and Motor Skills
Academic article
Ettema, Gerardus Johannes C. (1996) Mechanical efficiency and efficiency of storage and release of series elastic energy in skeletal muscle during stretch-shorten cycles. Journal of Experimental Biology
Academic article
Ettema, Gerardus Johannes C. (1997) Mechanical behaviour of rat skeletal muscle during fatiguing stretch-shorten cycles. Experimental Physiology
Academic article
Ettema, Gerardus Johannes C. (1997) Gastrocnemius muscle length in relation to knee and ankle joint angles: verification of a geometric model and some applications. Anatomical Record
Academic article
Ettema, Gerardus Johannes C. (1996) Contractile behaviour in rat gastrocnemius muscle during small amplitude sine wave perturbations. Journal of Biomechanics
Academic article
Ettema, Gerardus Johannes C. (1996) Elastic - and length-force characteristics of the gastrocnemius of the hopping mouse (notomys alexis) and the rat (rattus norvegicus). Journal of Experimental Biology
Academic article
Luchsinger, Harri Simon; Kocbach, Jan; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2020) Contribution from cross-country skiing, start time and shooting components to the overall and isolated biathlon pursuit race performance. PLOS ONE
Academic article
Ettema, Gertjan. (2023) Incorporating internal work leads to overestimations of total work in sprint running. European Journal of Applied Physiology
Commentary
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) A comparison of overarm throwing with the dominant and nondominant arm in experienced team handball players. Perceptual and Motor Skills
Academic article
Ettema, Gerardus Johannes C. (2001) Muscle efficiency: the controversial role of elasticity and mechanical energy conversion in stretch-shortening cycles. European Journal of Applied Physiology
Academic article
Ettema, Gerardus Johannes C; Meijer, Kenneth. (2000) Muscle contraction history: modified Hill versus an exponential decay model. Biological cybernetics
Academic article
Elfmark, Ola; Ettema, Gertjan; Groos, Daniel; Ihlen, Espen Alexander F.; Velta, Rune; Haugen, Per; Bråten, Steinar; Gilgien, Matthias. (2021) Performance analysis in ski jumping with a differential global navigation satellite system and video-based pose estimation. Sensors
Academic article
Skovereng, Knut; Ettema, Gertjan; Beekvelt, Mireille Van. (2017) The effect of cadence on shank muscle oxygen consumption and deoxygenation in relation to joint specific power and cycling kinematics. PLOS ONE
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Jakobsen, Vidar Eivind; Holmberg, Hans-Christer. (2011) Analysis of a sprint ski race and associated laboratory determinants of world-class performance. European Journal of Applied Physiology
Academic article
Bolger, Conor; Sandbakk, Øyvind; Ettema, Gertjan; Federolf, Peter Andreas. (2016) How hinge positioning in cross-country ski bindings affect exercise efficiency, cycle characteristics and muscle coordination during submaximal roller skiing. PLOS ONE
Academic article
Ettema, Gertjan; Øksnes, Magne; Kveli, Espen; Sandbakk, Øyvind. (2018) The effect of exhaustive exercise on the choice of technique and physiological response in classical roller skiing. European Journal of Applied Physiology
Academic article
Eythorsdottir, Ingrid Eir Thorp; Gløersen, Øyvind; Rice, Hannah; Werkhausen, Amelie; Ettema, Gertjan; Mentzoni, Fredrik; Solberg, Paul Andre; Lindberg, Kolbjørn Andreas; Paulsen, Gøran. (2024) The Battle of the Equations: A Systematic Review of Jump Height Calculations Using Force Platforms. Sports Medicine
Academic literature review
Ettema, Gerardus Johannes C; McGhie, David; Danielsen, Jørgen; Sandbakk, Øyvind; Haugen, Thomas André. (2016) On the existence of step-to-step breakpoint transitions in accelerated sprinting. PLOS ONE
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2003) Effects of instruction, emphasizing on velocity, accuracy or both on the performance and kinematics in overarm throwing. Perceptual and Motor Skills
Academic article
Tillaar, R van den; Ettema, Gerardus Johannes C. (2003) Instructions emphasizing velocity, accuracy, or both in performance and kinematics of overarm throwing by experienced team handball players. Perceptual and Motor Skills
Academic article
Tillaar, R van den; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
Academic article
McGhie, David; Ettema, Gerardus Johannes C. (2012) Biomechanical Analysis of Surface-Athlete Impacts on Third-Generation Artificial Turf. American Journal of Sports Medicine
Academic article
Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) Pedaling Technique and Energy Cost in Cycling. Medicine & Science in Sports & Exercise
Academic article
Baumgart, Julia Kathrin; Gurtler, Laura; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Comparison of peak oxygen uptake and exercise efficiency between upper-body poling and arm crank ergometry in trained paraplegic and able-bodied participants. European Journal of Applied Physiology
Academic article
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2013) Effects of Intensity and Duration in Aerobic High-Intensity Interval Training in Highly Trained Junior Cross-Country Skiers. Journal of Strength and Conditioning Research
Academic article
McGhie, David; Sandbakk, Øyvind; Østerås, Sindre; Ettema, Gertjan. (2019) Is There a Trade-Off Between Maximum Jumping and Throwing Capability in the Handball Jump Throw?. Sage Open
Academic article
McGhie, David; Ettema, Gertja. (2013) On the "trench effect" theory: A biomechanical analysis of the relationship between traction and shoe orientation on third-generation artificial turf. Footwear Science
Academic article
Dahl, Christine; Sandbakk, Øyvind; Danielsen, Jørgen; Ettema, Gertjan. (2017) The role of power fluctuations in the preference of diagonal vs. double poling sub-technique at different incline-speed combinations in elite cross-country skiers. Frontiers in Physiology
Academic article
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2011) Effects of Speed and Slope on Ski Skating Efficiency and Kinematics. Medicine & Science in Sports & Exercise
Conference abstract
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2013) The physiological and biomechanical contributions of poling to roller ski skating. European Journal of Applied Physiology
Academic article
Luchsinger, Harri; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Comparison of the Effects of Performance Level and Sex on Sprint Performance in the Biathlon World Cup. International Journal of Sports Physiology and Performance (IJSPP)
Academic article
Vandbakk, Kristine; Welde, Boye; Kruken, Andrea Hovstein; Baumgart, Julia Kathrin; Ettema, Gertjan; Karlsen, Trine; Sandbakk, Øyvind. (2017) Effects of upper-body sprint-interval training on strength and endurance capacities in female cross-country skiers. PLOS ONE
Academic article
Kolsung, Erik Borg; Ettema, Gertjan; Skovereng, Knut. (2020) Physiological Response to Cycling With Variable Versus Constant Power Output. Frontiers in Physiology
Academic article
Løkkeborg, Johannes Alnes; Ettema, Gerardus Johannes C. (2020) The role of incline, speed and work rate on the choice of technique in classical roller skiing. PLOS ONE
Academic article
Severin, Anna Cecilia; Ettema, Gertjan; Kocbach, Jan Martin. (2025) A method for processing inertial measurement unit data for para-Nordic sit-ski race analysis: a step-by-step guide. Sports Engineering
Academic article
Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Faude, Oliver; Holmberg, Hans-Christer; Sandbakk, Øyvind. (2015) Gender differences in power production, energetic capacity and efficiency of elite cross-country skiers during whole-body, upper-body, and arm poling. European Journal of Applied Physiology
Academic article
Skovereng, Knut; Ettema, Gerardus Johannes C; Welde, Boye; Sandbakk, Øyvind. (2013) On the relationship between upper-body strength, power and sprint performance in ice sledge hockey. Journal of Strength and Conditioning Research
Academic article
Noordhof, Dionne; Danielsson, Marius Lyng; Skovereng, Knut; Danielsen, Jørgen; Seeberg, Trine Margrethe; Haugnes, Pål; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2021) The dynamics of the anaerobic energy contribution during a simulated mass-start competition while roller-ski skating on a treadmill. Frontiers in Sports and Active Living
Academic article
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) A Comparison of Successful and Unsuccessful Attempts in Maximal Bench Pressing. Medicine & Science in Sports & Exercise
Academic article
Skovereng, Knut; Ettema, Gerardus Johannes C; Beekvelt, Mireille Van. (2016) Oxygenation, local muscle oxygen consumption and joint specific power in cycling: the effect of cadence at a constant external work rate. European Journal of Applied Physiology
Academic article

Books

Haugnes, Pål; Kocbach, Jan; Talsnes, Rune Kjøsen; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind. (2022) Race tactics in the heats of a sprint cross-country skiing competition. Swedish Winter Sports Research Centre at Mid Sweden University
Anthology
Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Munkebye, Øyvind; Ettema, Gertjan; Sandbakk, Øyvind. (2016) Heart rate profiles, external work rate and kinematics when ski skating on varying terrain during low-, moderate-, and high-intensity endurance training. University of Salzburg
Anthology

Part of book/report

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) The sticking point in bench pressing.
Academic chapter
Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) Utvikling av teknikk.
Non-fiction chapter
Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) A comparison of male throwing athletes and unskilled males when performing an overarm throwing task.
Academic chapter
Ettema, Gerardus Johannes C. (2006) On the proximal-distal sequence in explosive actions: the role of transfer of momentum.
Academic chapter
Supej, Matej; Oggiano, Luca; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Differences in air drag among elite male alpine skiers.
Academic chapter
Ettema, Gertjan; McGhie, David. (2019) Biomekanikk og bevegelse.
Non-fiction chapter
Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gertjan. (2016) Mechanical energy and work in treadmill double poling on roller skis.
Academic chapter
Skovereng, Knut; Ettema, Gertja; Beekvelt, Mireille V.; Sandbakk, Øyvind. (2013) Pulmonary oxygen consumption and oxygenation of upper-body muscles during isolated upper body poling at different exercise intensities.
Academic chapter
Ettema, Gertja; Skålvik, Tommy; Spencer, Matthew; Sandbakk, Øyvind. (2013) Performance and coordination in repeated sprint exercise for the upper body.
Academic chapter
Sandbakk, Øyvind; Hansen, Mads; Rønnestad, Bent; Ettema, Gertjan. (2013) Effects of heavy strength training on upper-body strength, power and sprint performance in ice sledge hockey.
Academic chapter
Bucher, Elias; Danielsen, Jørgen; Hegge, Ann Magdalen; Faude, Oliver; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2015) Technique differences between male and female cross-country skiers while whole body, upper body and arm poling on a ski ergometer.
Academic chapter
Ettema, Gerardus Johannes C; Hooiveld, Jo; Bråten, Steinar; Bobbert, Maarten F. (2007) The possible use of horizontal propulsion in imitation ski jumps.
Academic chapter
Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Joint-specific power contribution at increasing double poling intensities.
Academic chapter
Toussaint, Gerthory; Pedersen, Atle; Oterhals, Geir; Fiskvik, Anne Margrete; Ettema, Gerardus Johannes C; Bongaardt, Robert; Bakka, Egil; Audsen, Kjetil; Vereijken, Beatrix; Hokland, Jørn. (2002) La det swinge! Om kropp og bevegelse.
Academic chapter
Oggiano, Luca; Sætran, Lars Roar; Leirdal, Stig; Ettema, Gerardus Johannes C. (2008) Aerodynamic optimization and energy saving of cycling postures for international elite level cyclists.
Academic chapter
van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) A comparison of performance and kinematics in throwing with the dominant and non-dominant arm in handball players.
Academic chapter
Leirdal, Stig; Ettema, Gerardus Johannes C. (2012) Cycling.
Encyclopedia chapter
Skovereng, Knut; Beekvelt, Mireille Van; Ettema, Gerardus Johannes C. (2014) The effect of cadence on hip, knee and ankle contribution during cycling exercise.
Academic chapter
Ettema, Gerardus Johannes C; Bråten, Steinar. (2006) On the role of the location of centre of mass in ski jumping.
Academic chapter
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Skovereng, Knut; Welde, Boye; Ettema, Gerardus Johannes C. (2012) The Physiology of World Class Sledge Ice-Hockey.
Academic chapter
Ettema, Gerardus Johannes C; Bråten, Steinar. (2007) On the role of the location of centre of mass in ski jumping.
Academic chapter
Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2012) Effects of intensity and duration in aerobic high-intensity interval training.
Academic chapter
Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Comparison of arm, upper body and whole body double poling in female and male cross-country skiers.
Academic chapter
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) Efficiency in cross-country skiing. A brief review.
Academic chapter
Skovereng, Knut; Ettema, Gerardus Johannes C; Welde, Boye; Sandbakk, Øyvind. (2012) Relationships between Upper-Body Maximal Strength, Power and Sprint Performance in Sledge Ice-Hockey.
Academic chapter
Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Efficiency in endurance exercise: efficiency of what.
Academic chapter
Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, HC. (2012) The contribution from poling increases gender differences in elite cross-country skiers.
Academic chapter
Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2014) The role of gross mechanical efficiency in endurance sports.
Academic chapter

Report

Ettema, Gerardus Johannes C. (2000) Physiological and biomechanical constraints: muscle mechanics & motor action. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (1997) The Human Musculoskeletal System. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C; Roeleveld, Karin; van den Tillaar, Roland. (1999) Biologi i Grunnfag Idrett (IDR105) på internet. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (2000) Biomechanics: classic mechanics applied to the musculoskeletal system in a functional setting. [Mangler utgivernavn]
Working paper
Leirdal, Stig; Ettema, Gerardus Johannes C. (2003) Utholdenhet: Energifrigjøring, prestasjonsfaktorer, trening, tilpasninger og testing. Pensum Topptrenerstudiet Olympiatoppen-NTNU. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (2000) Motor behaviour: notes on neuro-physiology. [Mangler utgivernavn]
Working paper
Ettema, Gerardus Johannes C. (1996) Innovations in teaching musculoskeletal anatomy. [Mangler utgivernavn]
Research report
Ettema, Gerardus Johannes C; Kippers, Vaughan. (1996) Proceedings of the 1996 Conference of the anatomical society of Australia and New Zealand. [Mangler utgivernavn]
Research report
Haugnes, Pål; Kocbach, Jan; Torvik, Per Øyvind; Ekren, Thomas; Ettema, Gertjan; Sandbakk, Øyvind. (2017) How fast are cross-country skiers in the finish-sprint during a sprint competition? Book of Abstracts: "Performance in snow sports: Translating science into practice". Swedish winter sports research centre, Mid Sweden University
Research report

Student thesis or dissertation

Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) Effects of gender and training experience on kinematical and temporal aspects of overarm throwing technique. Norges Teknisk-Naturvitenskapelige Universitet, Program for Bevegelsesvitenskap
Master thesis
Rasdal, Vegard Finserås; Ettema, Gertjan; Sandbakk, Øyvind. (2019) Concurrent optimization of two extremes: performance, physiological, and training characteristics of world class Nordic combined athletes. Norges teknisk-naturvitenskapelige universitet
Doctoral thesis
Haugnes, Pål; Sandbakk, Øyvind Bucher; Ettema, Gertjan; Noordhof, Dionne Adriana. (2023) Doctoral theses at NTNU (2023:235) "Sprinting for the win in cross-country skiing: Pacing strategy, race tactics, and the finish sprint". NTNU Grafisk senter
Doctoral thesis
Danielsen, Jørgen; Ettema, Gertjan; Sandbakk, Øyvind. (2018) Energetics and dynamics of double poling cross-country skiing. Norges teknisk-naturvitenskapelige universitet
Doctoral thesis

Teaching

Biomechanics in human movement science

Outreach

2026

Interview

Ettema, Gertjan. (2026) Zo haal je goud bij schansspringen.

2025

Conference lecture

Ettema, Gertjan. (2025) External Power ('work intensity') versus metabolic cost as tool for movement technique analysis in able bodied and PARA sport. NTNU idrett forskningskonferanse 2025

2023

Conference poster

Dalen, Terje; Aune, Tore Kristian; Hjelde, Geir Håvard; Ettema, Gertjan; Sandbakk, Øyvind Bucher; McGhie, David Caley Ruud. (2023) Similarity of player load patterns between positions and matches in elite soccer. WCSF

2022

Conference lecture

Haugnes, Pål; Kocbach, Jan; Talsnes, Rune Kjøsen; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind. (2022) Race tactics in the heats of a sprint cross-country skiing competition. Nordic Winter Sports Conference

2021

Conference lecture

Ettema, Gertjan. (2021) Humans are not designed for cycling - right?. Cycling Research Network

2020

Conference lecture

Seeberg, Trine Margrethe; Kocbach, Jan; Noordhof, Dionne; Danielsen, Jørgen; Haugnes, Pål; Skovereng, Knut; Tjønnås, Johannes; Rindal, Ole Marius Hoel; Ettema, Gertjan; Sandbakk, Øyvind. (2020) COMPARISON OF SUB-TECHNIQUE UTILIZATION, KINEMATICS AND PHYSIOLOGICAL RESPONSES BETWEEN LOW- AND HIGH-INTENSITY ROLLER SKI SKATING. ECSS Conference
Conference lecture

Noordhof, Dionne; Seeberg, Trine Margrethe; Kocbach, Jan; Danielsen, Jørgen; Skovereng, Knut; Haugnes, Pål; Sandbakk, Øyvind; Ettema, Gertjan. (2020) Efficiency and cycle characteristics across sub-techniques in rollers-ski skating. European College of Sport Science Annual Congress

2019

Conference poster

Skovereng, Knut; Haugnes, Pål; Seeberg, Trine Margrethe; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind; Danielsen, Jørgen. (2019) Comparison of muscle oxygenation in arms and legs between sub-techniques while roller ski skating – a pilot study. Nordic Winter Sports Conference
Conference lecture

Skovereng, Knut; Haugnes, Pål; Seeberg, Trine Margrethe; Noordhof, Dionne; Sandbakk, Øyvind; Ettema, Gertjan; Danielsen, Jørgen. (2019) Terrain-specific fluctuations in muscle oxygen saturation during a simulated sprint skiing competition – a pilot study. Nordic Winter Sports Conference
Conference lecture

Ettema, Gertjan. (2019) Sub-techniques in classic and freestyle cross-country skiing – what factors play a role in which to choose?. Groningen Lectures in Movement Science
Conference lecture

Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan. (2019) Source of power generation during double poling at shallow and steep inclines. The 8th International Congress on Science and Skiing
Conference lecture

Ettema, Gertjan; Braaten, Steinar. (2019) Optimising performance in ski jumping. Nordic Winter Sports Conference
Conference poster

Danielsen, Jørgen; Haugnes, Pål; Noordhof, Dionne; Seeberg, Trine Margrethe; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind; Skovereng, Knut. (2019) Proskida pole force measurements during cross-country skiing. Poster presentation. Olympiatoppens forskningskonferanse
Conference poster

Danielsen, Jørgen; Haugnes, Pål; Noordhof, Dionne; Seeberg, Trine Margrethe; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind; Skovereng, Knut. (2019) Choice of sub-technique and pole forces during low- and high-intensity roller ski skating across hilly terrain – a pilot study. Nordic Winter Sports Conference
Conference poster

Skovereng, Knut; Haugnes, Pål; Seeberg, Trine Margrethe; Noordhof, Dionne; Ettema, Gertjan; Kocbach, Jan; Danielsson, Marius Lyng; Sandbakk, Øyvind; Danielsen, Jørgen. (2019) Comparison of muscle oxygenation during different sub-techniques in ski-skating. Olympiatoppens forskningskonferanse

2018

Conference lecture

McGhie, David; Østerås, Sindre; Ettema, Gertjan; Paulsen, Gøran; Sandbakk, Øyvind. (2018) Strength determinants of jump height in the jump throw movement in women handball players. Congress of the European College of Sport Science
Conference lecture

Kolsung, Erik Borg; Skovereng, Knut; Ettema, Gertjan. (2018) Physiological response to cycling with variable versus constant power output. Science in cycling
Conference poster

Skovereng, Knut; Kolsung, Erik Borg; Ettema, Gertjan. (2018) On the effect of constant and variable load during pedaling in elite cyclists. Olympiatoppens forskningskonferanse
Conference lecture

Almquist, Nicki Winfield; Ellefsen, Stian; Ettema, Gertjan; Sandbakk, Øyvind; Rønnestad, Bent. (2018) Effect of including 30-s sprints in prolonged endurance exercise on muscular adaptations and gross efficiency in highly trained cyclists. Cycling and Science

2017

Conference poster

Luchsinger, Harri; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Comparison of Performance-Levels and Sex on Sprint Race Performance in the Biathlon World Cup. Olympiatoppens forskningskonferanse
Conference poster

Baumgart, Julia Kathrin; Guertler, Laura; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Comparison of VO2peak and exercise efficiency between upper-body poling and arm crank ergometry in trained able-bodied and paraplegic participants. Olympiatoppen forskningskonferanse
Conference poster

Baumgart, Julia Kathrin; Skovereng, Knut; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Gas exchange and blood lactate thresholds in Paralympic athletes: do they really exist?. Olympiatoppen forskningskonferanse
Conference poster

McGhie, David; Sandbakk, Øyvind; Østerås, Sindre; Ettema, Gertjan. (2017) Is there a trade-off between maximum jumping and throwing capability in the handball jump throw?. Olympiatoppens research conference 2017
Conference poster

McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan; Gøran, Paulsen; Østerås, Sindre. (2017) Determinants of sport-specific jump height in female handball players. Olympiatoppens research conference 2017
Conference poster

Haugnes, Pål; Kocbach, Jan; Torvik, Per Øyvind; Ekren, Thomas; Ettema, Gertjan; Sandbakk, Øyvind. (2017) How fast are cross-country skiers in the finish-sprint during a sprint competition?. Olympiatoppens Forskningskonferanse 2017
Conference lecture

Haugnes, Pål; Kocbach, Jan; Torvik, Per Øyvind; Ekren, Thomas; Ettema, Gertjan; Sandbakk, Øyvind. (2017) How fast are cross-country skiers in the finish-sprint during a sprint competition?. NVC conference, Performance in snow sports: Translating science into practice
Lecture

Baumgart, Julia Kathrin; Skovereng, Knut; Ettema, Gertjan; Sandbakk, Øyvind. (2017) Endurance performance in Paralympic sitting sports – testing and training. NVC conference
Conference lecture

Ettema, Gertjan; Kveli, Espen; Øksnes, Magne; Sandbakk, Øyvind. (2017) The Role of Speed and Incline on the Spontaneous Choice of Technique in Classical Roller-Skiing. 26th Annual Meeting of ESMAC
Conference lecture

Ettema, Gertjan; Øksnes, Magne; Kveli, Espen; Sandbakk, Øyvind. (2017) The effect of fatigue on choice of technique and physiological response in cross-country skiing. NVC conference “Performance in snow sports: Translating science into practice”
Conference lecture

Skovereng, Knut; Aasvold, Lorents Ola; Ettema, Gertjan. (2017) Joint specific power is not affected by changes in hand position in recreational and elite cyclists. Science in cycling
Conference poster

Skovereng, Knut; Ettema, Gertjan; Aasvold, Lorents Ola. (2017) Low cadence increases hip joint contribution during cycling at different power outputs. Olympiatoppens forskningskonferanse
Conference poster

Skovereng, Knut; Aasvold, Lorents Ola; Ettema, Gertjan. (2017) On the effect of changing handgrip position during cycling at different power outputs. Olympiatoppens forskningskonferanse
Conference lecture

Aasvold, Lorents Ola; Ettema, Gertjan; Skovereng, Knut. (2017) Joint specific power production in cycling: the effect of cadence and athlete level. Science in cycling
Lecture

Sandbakk, Øyvind; Ettema, Gertjan. (2017) Motion capture in elite sport athletes. Seminar GEMS

2016

Conference lecture

Welde, Boye; Vandbakk, Kristine; Hovstein, Andrea; Baumgart, Julia Kathrin; Ettema, Gerardus Johannes C; Karlsen, Trine; Sandbakk, Øyvind. (2016) On the effects of upper-body sprint-interval training on maximal strength and aerobic Power in female cross-country skiers. 7th International Congress on Science and Skiing
Conference poster

Ettema, Gertjan; McGhie, David; Danielsen, Jørgen; Sandbakk, Øyvind; Haugen, Thomas André. (2016) On the existence of step-to-step breakpoint transitions in accelerated sprinting. Olympiatoppens forskningskonferanse
Conference poster

Rasdal, Vegard; Fudel, Ronny; Kocbach, Jan; Moen, Frode; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2016) Association between laboratory capacities and world-cup performance in nordic combined. Olympiatoppens forskningskonferanse
Conference lecture

Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2016) Mechanical energy and work in treadmill double poling on roller skis. 7th International Congress on Science and SKiing
Conference poster

Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Munkebye, Øyvind; Ettema, Gertjan; Sandbakk, Øyvind. (2016) Heart rate profiles, external work rate and kinematics when ski skating on varying terrain during low-, moderate-, and high-intensity endurance training. Olympiatoppens forskningskonferanse 2016
Conference lecture

Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Munkebye, Øyvind; Ettema, Gertjan; Sandbakk, Øyvind. (2016) Heart rate profiles, external work rate and kinematics when ski skating on varying terrain during low-, moderate-, and high-intensity endurance training. 7th International Congress On Science And Skiing

2015

Conference lecture

Danielsen, Jørgen; Sandbakk, Øyvind; Holmberg, H-C; Ettema, Gerardus Johannes C. (2015) Mechanical energy fluctuations and propulsion in double poling. 3rd International Congress on Science and Nordic Skiing
Conference lecture

Ettema, Gerardus Johannes C; Danielsen, Jørgen; Sandbakk, Øyvind. (2015) Comparison of center of mass energy fluctuations by use of force and motion capture recordings. 3rd International Congress on Science and Nordic Skiing
Conference poster

Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David; Ettema, Gertjan. (2015) Mechanical power and dynamics of uphill double-poling on roller-skis at different incline-speed combinations. Olympiatoppens forskningskonferanse 2018
Conference poster

Rasdal, Vegard; Bråten, Steinar; Moen, Frode; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2015) How do world-class Nordic Combined athletes differ from specialized cross-country skiers and ski jumpers in sport-specific capacity and training characteristics?. Olympiatoppens Forskningskonferanse
Conference poster

Luchsinger, Harri; Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Baumeister, Jochen; Schubert, Michael. (2015) A comparison of brain activity during shooting among biathletes and cross-country skiers before and after vigorous exercise. Olympiatoppens forskningskonferanse

2014

Conference poster

Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; Koning, Jos De; Rognstad, Asgeir Bakken; Hoset, Martin; Sandbakk, Øyvind. (2014) The effects of the arm swing on biomechanical and physiological aspects of roller ski skating. Olympiatoppens Forskningskonferanse 2014, NIH, Oslo.
Lecture

Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Comparison of arm, upper body and whole body double poling in male and female cross-country skiers. 19th Annual Congress of the ECSS, Amsterdam, The Netherlands
Lecture

Bolger, Conor; Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Federolf, Peter Andreas. (2014) Does the Position of the Hinge in Cross-country Ski Bindings Affect Muscle Activation in Skating?. 2nd International Congress on Sport Science Research and Technology Support, 2014, Rome, Italy.
Conference poster

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2014) Analysis of a sprint ski race and associated laboratory determinants of world-class performance. Olympiatoppens Forskningskonferanse 2014
Conference poster

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2014) Gender differences in endurance performance by elite cross-country skiers are influenced by the contribution from poling. Olympiatoppens Forskningskonferanse 2014
Conference poster

Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Relative power contributions in double poling. Olympiatoppens Forskningskonferanse 2014
Conference poster

Sandbakk, Øyvind; Holmberg, Hans-Christer; Leirdal, Stig; Ettema, Gerardus Johannes C. (2014) The physiology of world-class sprint skiers. Olympiatoppens Forskningskonferanse 2014
Conference poster

Sandbakk, Øyvind; Rønnestad, Bent; Hansen, Mads; Ettema, Gerardus Johannes C. (2014) Effects of heavy strength training on upper-body strength, power and sprint performance in ice sledge hockey. Olympiatoppens Forskningskonferanse 2014
Conference poster

Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Energy Fluctuations in Double Poling. Olympiatoppens Forskningskonferanse 2014
Conference poster

Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2014) Effects of intensity and duration in aerobic high-intensity interval training. Olympiatoppens Forskningskonferanse 2014
Conference lecture

Skovereng, Knut; Beekvelt, Mireille Van; Ettema, Gerardus Johannes C. (2014) The effect of cadence on hip, knee and ankle contribution during cycling exercise. 19th ECSS Congress 2-5 July 2014 Amsterdam/NED
Conference poster

Grasaas, Christina Åsan; Ettema, Gerardus Johannes C; Hegge, Ann Magdalen; Skovereng, Knut; Sandbakk, Øyvind. (2014) Changes in technique and efficiency after high-intensity exercise during roller ski skating. Olympiatoppens Forskningskonferanse 2014, NIH, Oslo.
Conference lecture

Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Efficiency in endurance exercise: efficiency of what?. 19th Annual Congress of the ECSS
Conference poster

Hegge, Ann Magdalen; Bucher, E; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer; Faude, Oliver; Sandbakk, Øyvind. (2014) A comparison of arm, upper body and whole body poling in male and female cross-country skiers. Olympiatoppens Forskningskonferanse 2014, NIH, Oslo.
Conference lecture

Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Joint-specific power contribution at increasing double poling intensities. 19th Annual Congress of the ECSS
Conference lecture

Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2014) The role of gross mechanical efficiency in endurance sports. 19th Annual Congress of the ECSS
Conference poster

Skovereng, Knut; Ettema, Gerardus Johannes C; Beekvelt, Mireille Van. (2014) Oxygen consumption in the whole body and the local muscles. Olympiatoppens Forskningskonferanse
Conference poster

Skovereng, Knut; Welde, Boye; Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Upper-body maximal strength and power predict sprint performance in Ice sledge-hockey. Olympiatoppens Forskningskonferanse

2013

Conference lecture

Skovereng, Knut; Ettema, Gertja; Beekvelt, Mireille V.; Sandbakk, Øyvind. (2013) Pulmonary oxygen consumption and oxygenation of upper-body muscles during isolated upper body poling at different exercise intensities. 18th Annual Congress of the ECSS
Conference lecture

Ettema, Gertja; Grasaas, Christina Åsan; Grasaas, Erik; Sandbakk, Øyvind. (2013) Changes in technique after high-intensity exercise during roller ski skating. 6th International congress of science and skiing
Conference lecture

Ettema, Gertja; Skålvik, Tommy; Spencer, Matthew; Sandbakk, Øyvind. (2013) Performance and coordination in repeated sprint exercise for the upper body. 18th Annual Congress of the ECSS
Conference lecture

Hegge, Ann Magdalen H. S.; Holmberg, Hans-Christer; Ettema, Gertja. (2013) Comparison of the G3 and G4 skating techniques in cross-country skiing. 6th International Congress on Science and Skiing, St. Christoph a. Arlberg, Austria
Conference poster

Hegge, Ann Magdalen H. S.; Ettema, Gertja; Sandbakk, Øyvind. (2013) Determinants of a 3-min all-out upper body poling exercise in elite cross-country skiers. 6th International Congress on Science and Skiing, St. Christoph a. Arlberg, Austria
Conference lecture

Hegge, Ann Magdalen H. S.; Ettema, Gertja; Hoset, Martin; Rognstad, Asgeir Bakken; Koning, Jos De; Sandbakk, Øyvind. (2013) Physiological and biomechanical analysis of the arm swing in roller ski skating. 15th Annual Congress of the ECSS, Barcelona, Spain
Conference lecture

Sandbakk, Øyvind; Hansen, Mads; Rønnestad, Bent; Ettema, Gertjan. (2013) Effects of heavy strength training on upper-body strength, power and sprint performance in ice sledge hockey. European College of Sport Science

2012

Conference lecture

Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Skovereng, Knut; Welde, Boye; Ettema, Gerardus Johannes C. (2012) The Physiology of World Class Sledge Ice-Hockey. 17th Annual Congress of the ECSS
Conference poster

Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Ettema, Gerardus Johannes C; Welde, Boye. (2012) Effects of intensity and duration in aerobic high-intensity interval training. 2nd International Conference of Science in Nordic Skiing
Conference lecture

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) The contribution from poling increases gender differences in elite cross-country skiers. 2nd international conference of science in nordic skiing
Conference poster

Skovereng, Knut; Ettema, Gerardus Johannes C; Welde, Boye; Sandbakk, Øyvind. (2012) Relationships between Upper-Body Maximal Strength, Power and Sprint Performance in Sledge Ice-Hockey. 17th Annual Congress of the ECSS
Conference lecture

van den Tillaar, Roland; Sæterbakken, Atle Hole; Ettema, Gerardus Johannes C. (2012) A comparison of muscle activation between maximum pure concentric and counter movement bench pressing. XXX International Symposium on Biomechanics in Sports 2012. Melbourne, Australia 01.07-5.07.12.
Conference poster

Peters, Marlijn; Weerdenburg, Ingrid J van; Geurts, Alexander C; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2012) Postural steadiness during tandem stance: The influence of foot positioning and weight distribution on center of gravity and center of pressure trajectories. Joint World Congress of Gait & Mental Function
Conference poster

Weerdenburg, Ingrid J van; Peters, Marlijn; Geurts, Alexander C; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2012) The influence of foot dominance and task on the trajectory of CoP and CoG in planned gait termination. Joint World Congress of Gait & Mental Function
Conference poster

McGhie, David; Ettema, Gerardus Johannes C. (2012) Biomechanical analysis of traction at the shoe-surface interface on third generation artificial turf. The Engineering of Sport 9

2011

Conference lecture

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Løkke, Trine Beate; Holmberg, Hans-Christer. (2011) The impact of pole propulsion on kinematics and fatigue in roller ski skating. 16th Annual Congress of the European College of Sport Science
Conference lecture

Ettema, Gerardus Johannes C; Sandbakk, Øyvind; Leirdal, Stig. (2011) Maximal aerobic capacity and efficiency in world class sprint skiers using the double poling and G3 skating technique. 16th Annual Congress of the European College of Sport Science
Conference lecture

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2011) Effects of Speed and Slope on Ski Skating Efficiency and Kinematics. 58th Annual Meeting and 2nd World Congress on Exercise is Medicine
Conference lecture

Aune, Tore Kristian; Aune, Morten Andreas; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2011) Larger bilateral force deficit in proximal than distal joints might be linked to differences in interhemispheric communication. 16th Annual Congress of the European College of Sport Science
Conference lecture

Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) Pedaling technique and energy cost in cycling. 16th Annual Congress of the European College of Sport Science

2010

Conference poster

Sandbakk, Øyvind; Leirdal, Stig; Ettema, Gerardus Johannes C. (2010) Effect of frequency in roller ski skating. 5th International Congress on Science and Skiing - ICSS 2010
Conference lecture

Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Holmberg, Hans-Christer. (2010) Physiological gender differences associated with sprint skiing performance. 5th International Congress on Science and Skiing - ICSS 2010

2009

Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2009) Acomparison of successful and unsuccessful attempts in 1RM bench press. 14th Annual Congress of the ECSS
Conference lecture

Ettema, Gerardus Johannes C; McGhie, David; Olsen, Kristian Killi; Lillemark, Kristian. (2009) The effect of body orientation om cycling technique. 14th Annual Congress of the ECSS
Conference lecture

Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) Freely chosen cadence and gross efficiently during ergometer and free bicycling. 14th Annual Congress of the ECSS
Conference lecture

Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) On the relationship between gross efficiency and force effectiveness during ergometer cycling. 11th International Conference of Sport Kinetics
Conference poster

Ettema, Gerardus Johannes C; Sandbakk, Øyvind; Leirdal, Stig; Holmberg, HC. (2009) Efficiency at high work rates in world class skiers. 14th Annual Congress of the ECSS
Conference poster

Sandbakk, Øyvind; Leirdal, Stig; Holmberg, HC; Ettema, Gerardus Johannes C. (2009) The physiology of world class sprint skiers. 14th Annual Congress of the ECSS
Conference poster

Leirdal, Stig; Sandbakk, Øyvind; Holmberg, HC; Ettema, Gerardus Johannes C. (2009) Sub-maximal efficiency during roller ski skating. 14th Annual Congress of the ECSS
Conference poster

Sommervoll, Yngve; Ettema, Gerardus Johannes C; Vereijken, Beatrix. (2009) Dual tasking: The effect of task, frequency, and age on variability of finger tapping. Progress in Motor Control VII
Conference poster

Ettema, Gerardus Johannes C. (2009) Inertial loading in level and uphill cycling. 11th International Conference of Sport Kinetics

2008

Conference poster

Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2008) The effect of gender and training experience on body segments’ contribution in overarm throwing. 2nd Congress of Complex System in Sports, 10th European Workshop of Ecological Psychology
Conference lecture

Oggiano, Luca; Sætran, Lars Roar; Leirdal, Stig; Ettema, Gerardus Johannes C. (2008) Aerodynamic optimization and energy saving of cycling postures for international elite level cyclists. 7th ISEA CONFERENCE 2008

2006

Conference lecture

Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) A comparison of male throwing athletes and unskilled males in fast overarm throws. Nordisk Konferanse i Bevegelsesvitenskap 2006
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) A comparison of performance and kinematics in throwing with the dominant and non-dominant arm in handball players. The XXIV International Symposium on Biomechanics in Sports
Conference lecture

Ettema, Gerardus Johannes C. (2006) On the proximal-distal sequence in explosive actions: the role of transfer of momentum. Nordisk Konferanse i Bevegelsesvitenskap 2006
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2006) The sticking point in bench pressing. Nordisk Konferanse i Bevegelsesvitenskap 2006

2005

Conference lecture

Oterhals, Geir; Ettema, Gerardus Johannes C. (2005) Bilateral Deficit in Human Jumping Performance. Biomove
Conference lecture

Leirdal, Stig; Ettema, Gerardus Johannes C; Bråten, Steinar; Kvålsvoll, Atle. (2005) Analyses of technique in cycling: A pilot study. BIOMOVE
Conference lecture

Leirdal, Stig; Ettema, Gerardus Johannes C; Bråten, Steinar; Kvålsvoll, Atle. (2005) Analyses of technique in cycling: A pilot study. Nordisk konferanse om bevegelsesanalyse

2004

Lecture

Ettema, Gerardus Johannes C; Roeleveld, Karin. (2004) Prøv deg på skihoppsimulator. Forskningstorget
Conference lecture

Ettema, Gerardus Johannes C. (2004) Computer simulation of ski jumping: Furthering our understanding of task constraints. Forskningsseminar bevegelsesvitenskap, NTNU
Conference lecture

Leirdal, Stig; Holtermann, Andreas; Roeleveld, Karin; Sætran, Lars Roar; Bråten, Steinar; Løset, Sveinung; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2004) Influence of body position on performance in sprint cross-country ski skating. International Conference of Sport Sciences

2003

Conference poster

Leirdal, Stig; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2003) Power traning and bi-articular muscle function in vertical jumping. ECSS Salzburg 2003, 8th annual congress european college of sport science
Conference lecture

Ettema, Gerardus Johannes C; van den Tillaar, Roland; Kristensen, Geir Olav. (2003) Speed specificity in sprint training. 8th Annual Congress of the European College of Sport Science
Conference lecture

Leirdal, Stig; Holtermann, Andreas; Roeleveld, Karin; Sætran, Lars Roar; Vereijken, Beatrix; Bråten, S.; Løset, S.; Ettema, Gerardus Johannes C. (2003) Influence of body position on performance in sprint cross-country ski skating. Nordisk konferanse i Bevgelsesvitenskap, NKB 2003
Conference lecture

Bråten, S.; Ettema, Gerardus Johannes C. (2003) Funksjonell feedback i teknikktrening. Nordisk konferanse i bevegelsesvitenskap 2003
Lecture

Ettema, Gerardus Johannes C; Leirdal, Stig; Holtermann, Andreas; Roeleveld, Karin; Sætran, Lars Roar; Vereijken, Beatrix; Bråten, S.; Løset, Sveinung. (2003) Sprint Langrenn og Teknikk - Kroppsposisjon, luftmotstand, effekt og kostnad. OLT-fagmøte - langrenn
Conference lecture

Bråten, S.; Ettema, Gerardus Johannes C. (2003) Skihopp - prøving eller læring?. Nordic Conference in Movement Science, 2003
Conference lecture

Brændvik, Siri; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2003) Adaptions following a transtibal amputation - The emergence of new muscle and joint assemblies. XV International Interbor Congrass on prosthetics and ortotics
Conference lecture

Ettema, Gerardus Johannes C. (2003) Computer simulation of movement dynamics in research and teaching. Nordisk konferanse i bevegelsesvitenskap 2003
Conference lecture

van den Tillaar, Roland; sæterbakken, Atle; Manger, Kyrre; Ettema, Gerardus Johannes C. (2003) Influence of instruction on velocity and accuracy of overarm throwing in novices. Nordic conference in Human Movement Sciences; Nordisk konferense i bevegelsesvitenskap

2002

Conference lecture

Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Karlsson, J Stefan; Ettema, Gerardus Johannes C. (2002) Neural adaptations during learning a strength task. International society for elektromyography and kinesiology
Lecture

Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2002) Bevegelsesvitenskap, hester og terapi. annual meeting of the fagforum for terapiridning
Conference lecture

Fiskvik, A.; Vereijken, Beatrix; Ettema, Gerardus Johannes C; Pedersen, Arve Vorland; Bongaardt, Robert. (2002) The body in motion as a scientific phenomenon. International conference on cognitive aspects of dance
Conference lecture

Tegdan, Trine; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2002) Fatigue and muscle coordination in subjects with patellofemoral pain syndrome. Symposium for Bevegelsesanalyse
Conference lecture

Ettema, Gerardus Johannes C; Tegdan, Trine; Roeleveld, Karin. (2002) Fatigue and muscle coordination in subjects with patellofemoral pain syndrome. IVth World Congress of Biomechanics, August 4-9 2002, Calgary Canada.
Conference lecture

Leirdal, Stig; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2002) Power training and biarticular muscle function in vertical jumping. Symposium for Bevegelsesanalyse
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C; Gløssen, Tommy. (2002) Effect of three different strength training programs with the same workload on velocity in overarm throwing. 3rd international conference on strength traning; Strength training in sport and Rehabilitation
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2002) The proximal-distal sequence in overarm throwing and the effect of ball weight. IV World Congress Biomechanics, 4-9 August, 2002
Conference lecture

Brandvik, Siri; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2002) Neuro-muscular adaptation following a below knee amputation. Symposium for Bevegelsesanalyse
Conference lecture

Holtermann, Andreas; Roeleveld, Karin; Vereijken, Beatrix; Ettema, Gerardus Johannes C. (2002) Neural adaptations during learning a strength task. Symposium for Bevegelsesanalyse
Lecture

Ettema, Gerardus Johannes C; Tegdan, Trine. (2002) Bevegelsesvitenskap ved NTNU. [Mangler data]
Conference poster

Brandvik, Siri; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2002) Neuro-muscular adaptation following a below knee amputation. XIVth Congress of the International Society of Electrophysiology and Kinesiology "Standardization for a better exchange of ideas"

2001

Conference lecture

Brandvik, Siri; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2001) Nevro-muskulære tilpasninger etter en leggamputasjon. tverrfaglig symposium
Conference lecture

Ettema, Gerardus Johannes C. (2001) Muscle force generation and stability in explosive actions. 6th Annual Congress of the European College of Sport Science
Lecture

Ettema, Gerardus Johannes C. (2001) Bevegelseslære og anatomi. Møte av Rådet for folkemusikk og folkedans, NTNU
Conference lecture

Haukvik, Ingrid Vee; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2001) Comparison of coordination in vertical jumping in adults and young children. XVIII th International Congress of Biomechanics
Conference poster

Ettema, Gerardus Johannes C. (2001) Muscle activation of quadriceps femoris in subjects with patellofemoral pain syndrome and healthy subjects when fatigued. Idrettsmedisinsk Høstkongress

2000

Conference lecture

Ettema, Gerardus Johannes C. (2000) Bewegingswetenschappen in Trondheim - mogelijkheden en begrenzingen. [Mangler data]
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2000) Influences of instruction on velocity and accuracy of overarm throwing. Fifth Annual Congress of the European College of Sport Science, Jyväskylä Finland, 19-23 July 2000.
Conference lecture

van den Tillaar, Roland; Ettema, Gerardus Johannes C. (2000) Influence of instruction on velocity and coordination of overarm throwing in handball. International Conference on Motor control,Bielsko-Biata, Poland, 27-29 November 2000
Conference lecture

Ettema, Gerardus Johannes C. (2000) Biomekanikk i bevegelse - III: Musklel. [Mangler data]
Conference lecture

Ettema, Gerardus Johannes C. (2000) Biomekanikk i bevegelse - II: Mekanikk og vev. [Mangler data]
Conference lecture

Ettema, Gerardus Johannes C. (2000) Biomekanikk i bevegelse - I: Kraft i bevegelse. [Mangler data]

1999

Conference lecture

Kippers, Vaughan; Ettema, Gerardus Johannes C. (1999) Musculoskeletal constraints in motor control. Queensland State Conference: Musculo-skeletal Injuries, Prevention, Management & Rehabilitation
Conference lecture

Taylor, Emma; Kippers, Vaughan; Ettema, Gerardus Johannes C. (1999) Muscular control of complex elbow movements. Queensland State Conference: Musculo-skeletal Injuries, Prevention, Management
Conference lecture

Kippers, Vaughan; Ettema, Gerardus Johannes C; Taylor, Emma; North, David. (1999) Muscular control of attempted movements at joints with two degrees of freedom. Fifth IOC World Congress
Conference lecture

North, David; Kippers, Vaughan; Ettema, Gerardus Johannes C. (1999) Muscular control of combined knee movements. Queensland State Conference: Musculo-skeletal Injuries, Prevention, Management
Conference lecture

Ettema, Gerardus Johannes C. (1999) Muscle coordination in movement: lessons learned from static actions. International Research Course on Dance, Culture and Human Movement Science
Conference lecture

Ettema, Gerardus Johannes C. (1999) Biological Factors in Human Movement - The importance of being biological. Human Movement Science in Perspective
Conference lecture

Ettema, Gerardus Johannes C. (1999) Motor Control: structure-action-function. [Mangler data]

1998

Conference lecture

Ettema, Gerardus Johannes C. (1998) Muscle mechanics and vertebrate locomotion III: Locomotion styles. [Mangler data]
Conference lecture

Ettema, Gerardus Johannes C. (1998) Muscle mechanics and vertebrate locomotion II: Muscle as engine or spring. [Mangler data]
Conference lecture

Ettema, Gerardus Johannes C. (1998) Muscle mechanics and vertebrate locomotion I: muscle properties. [Mangler data]
Lecture

Ettema, Gerardus Johannes C. (1998) Controlling Ground Reaction Force. Human Movement Science Seminar 1998
Conference lecture

Ettema, Gerardus Johannes C. (1998) Hill-type muscle models and an alternative describing contraction history. Third World Congress of Biomechanics

1997

Conference lecture

Ettema, Gerardus Johannes C. (1997) Series elastic energy in stretch-shortening cycle. Biannual Conference of the Department of Biomedical Sciences, U niversity of Sydney (1997-10-02/04)
Conference lecture

Ettema, Gerardus Johannes C. (1997) Muscle stiffness : significance in motor control. Biannual Conference of the Department of Biomedical Sciences, U niversity of Sydney (1997-10-02/04)
Conference lecture

Ettema, Gerardus Johannes C. (1997) Series elastic energy in stretch-shortening cycle. 11th Biennial Conference of the Department of Biomedical Sciences of the Faculty of Health sciences
Conference lecture

Ettema, Gerardus Johannes C. (1997) Muscle stiffness: significance in motor control. 11th biennial Conference of the Department of Biomedical Sciences of the Faculty of Health sciences

1996

Conference lecture

Ettema, Gerardus Johannes C; Weinrauch, Patrick; Kippers, Vaughan. (1996) Influence of hip rotation on coordination of knee extensor exercises. The 1996 Conference of the Anatomical Society of Australia and New Zealand
Conference lecture

Ettema, Gerardus Johannes C. (1996) Effects of muscle fatigue on series elastic stiffness and mechanical efficiency in skeletal muscle. Proceedings of The Eleventh Congress of the International Society of Electrophysiological Kinesiology
Conference lecture

Ettema, Gerardus Johannes C; Blowers, Alan. (1996) Advances in artificial stimulation of muscle using a direct current block. Proceedings of The Eleventh Congress of the International Society of Electrophysiological Kinesiology
Conference lecture

Ettema, Gerardus Johannes C. (1996) Muscle length in bipedal and quadrupedal animals in relation to locomotor behaviour. The First Australasian Biomechanics Conference
Conference lecture

Ettema, Gerardus Johannes C. (1996) Misconceptions in skeletal muscle function introduced by level-one gross anatomy teaching. The 1996 Conference of the Anatomical Society of Australia and New Zealand, Brisbane
Conference lecture

Ettema, Gerardus Johannes C; Kippers, Vaughan; Weinrauch, Patrick. (1996) Influence of hip rotation on activation of individual human thigh muscles during isometric knee extensor exercises. The Eleventh Congress of the International Society of Electrophysiological Kinesiology

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Gertjan Ettema

Gertjan Ettema

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