2025

• 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
• Skovereng, Knut; Sandbakk, Øyvind Bucher; Ettema, Gertjan; Noordhof, Dionne Adriana; Seeberg, Trine Margrethe; Kocbach, Jan Martin. (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

2024

• Eythorsdottir, Ingrid Eir Thorp; Gløersen, Øyvind; Rice, Hannah; Werkhausen, Amelie; Ettema, Gertjan; Mentzoni, Fredrik. (2024) The Battle of the Equations: A Systematic Review of Jump Height Calculations Using Force Platforms. Sports Medicine
  Academic literature review
• 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

2023

• 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
• Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) Utvikling av teknikk. Fagbokforlaget
  Chapter
• 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. (2023) Incorporating internal work leads to overestimations of total work in sprint running. European Journal of Applied Physiology
  Letter to the editor
• Haugnes, Pål ; Kocbach, Jan Martin; Noordhof, Dionne Adriana; Kjøsen Talsnes, Rune; Ettema, Gertjan; Sandbakk, Øyvind Bucher. (2023) The influence of tactical positioning on performance in sprint cross-country skiing. PLOS ONE
  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
• 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 dissertation

2022

• Elfmark, Ola; Ettema, Gertjan; Gilgien, Matthias. (2022) Assessment of the steady glide phase in ski jumping. Journal of Biomechanics
  Academic article
• 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; Kjøsen Talsnes, Rune; 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
  Academic anthology/Conference proceedings
• Haugnes, Pål ; Kocbach, Jan; Kjøsen Talsnes, Rune; 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
• 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

2021

• 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)
  Short communication
• Noordhof, Dionne; Danielsson, Marius Lyng; Skovereng, Knut; Danielsen, Jørgen; Seeberg, Trine Margrethe; Haugnes, Pål . (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
• 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
• 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
• 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
• 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
• 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. (2021) Performance analysis in ski jumping with a differential global navigation satellite system and video-based pose estimation. Sensors
  Academic article
• Severin, Cecilia; Danielsen, Jørgen; Erichsen, Jorgen Falck; Eikevåg, Sindre Wold; Steinert, Martin; Ettema, Gertjan. (2021) Case Report: Adjusting Seat and Backrest Angle Improves Performance in an Elite Paralympic Rower. Frontiers in Sports and Active Living
  Academic article

2020

• 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 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
• 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
• 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
• 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
• Kolsung, Erik Borg; Ettema, Gertjan; Skovereng, Knut. (2020) Physiological Response to Cycling With Variable Versus Constant Power Output. Frontiers in Physiology
  Academic article

2019

• 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
• Aasvold, Lorents Ola; Ettema, Gertjan; Skovereng, Knut. (2019) Joint specific power production in cycling: The effect of cadence and intensity. PLOS ONE
  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
• 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
• 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
• 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
• 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
• Ettema, Gertjan; McGhie, David. (2019) Biomekanikk og bevegelse. Universitetsforlaget
  Chapter
• Sandbakk, Øyvind; Ettema, Gertjan; Torvik, Per Øyvind; McGawley, Kerry. (2019) Nordic Winter Sports Conference. Nordic Winter Sports Conference
  Other presentation
• Rasdal, Vegard Finserås; Ettema, Gertjan; Sandbakk, Øyvind. (2019) Concurrent optimization of two extremes: performance, physiological, and training characteristics of world class Nordic combined athletes. NTNU
  Doctoral dissertation

2018

• 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
• 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
• 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
• 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. NTNU Open
  Doctoral dissertation
• 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
• 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

2017

• 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
• 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
• Vandbakk, Kristine; Welde, Boye; Kruken , Andrea Hovstein; Baumgart, Julia Kathrin; Ettema, Gertjan; Karlsen, Trine. (2017) Effects of upper-body sprint-interval training on strength and endurance capacities in female cross-country skiers. PLOS ONE
  Academic article
• Skovereng, Knut; Ettema, Gertjan; Van Beekvelt, Mireille. (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
• 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
• 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
  Report
• 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
• 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

2016

• 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
• 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
• 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
• Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gertjan. (2016) Mechanical energy and work in treadmill double poling on roller skis.
  Academic chapter/article/Conference paper
• 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. Book of abstracts: 7th International congress on science and skiing. (1)
  Academic anthology/Conference proceedings
• 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; 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
• 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
• Skovereng, Knut; Ettema, Gerardus Johannes C; Van Beekvelt, Mireille. (2016) Local muscle oxygen consumption related to external and joint specific power. Human Movement Science
  Academic article
• Skovereng, Knut; Ettema, Gerardus Johannes C; Van Beekvelt, Mireille. (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
• 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
• 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

2015

• Sandbakk, Øyvind; Skålvik, Tommy Fredriksen; Spencer, Matthew; Van Beekvelt, Mireille; Welde, Boye; Hegge, Ann Magdalen. (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
• 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/article/Conference paper
• 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

2014

• 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
• Skovereng, Knut; Van Beekvelt, Mireille; Ettema, Gerardus Johannes C. (2014) The effect of cadence on hip, knee and ankle contribution during cycling exercise.
  Academic chapter/article/Conference paper
• 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/article/Conference paper
• 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?. SciTePress
  Other
• Ettema, Gerardus Johannes C; Sandbakk, Øyvind. (2014) Efficiency in endurance exercise: efficiency of what.
  Academic chapter/article/Conference paper
• Danielsen, Jørgen; Sandbakk, Øyvind; Ettema, Gerardus Johannes C. (2014) Joint-specific power contribution at increasing double poling intensities.
  Academic chapter/article/Conference paper
• Sandbakk, Øyvind; Holmberg, Hans-Christer; Ettema, Gerardus Johannes C. (2014) The role of gross mechanical efficiency in endurance sports.
  Academic chapter/article/Conference paper
• Andersson, E.; Stöggl, T; Pellegrini, B.; Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2014) Biomechanical analysis of the herringbone technique as employed by elite cross-country skiers. Scandinavian Journal of Medicine & Science in Sports
  Academic article
• Hoset, Martin; Rognstad, Asgeir Bakken; Rølvåg, Terje; Ettema, Gertja; Sandbakk, Øyvind. (2014) Construction of an instrumented roller ski and validation of three-dimensional forces in the skating technique. Sports 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
• 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
• Hegge, Ann Magdalen; Ettema, Gerardus Johannes C; de Koning, Jos; 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
• 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
• McGhie, David; Ettema, Gertja. (2014) 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, H.C.. (2014) 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
• 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

2013

• Sandbakk, Øyvind; Bucher Sandbakk, Silvana; 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
• Supej, Matej; Sætran, Lars Roar; Oggiano, Luca; Ettema, Gerardus Johannes C; Sarabon, N; Nemec, B. (2013) 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• Ettema, Gertja; Skålvik, Tommy; Spencer, Matthew; Sandbakk, Øyvind. (2013) Performance and coordination in repeated sprint exercise for the upper body.
  Academic chapter/article/Conference paper
• 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/article/Conference paper
• 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/article/Conference paper

2012

• 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
• 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
• 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
• Leirdal, Stig; Ettema, Gerardus Johannes C. (2012) Cycling. Springer
  Encyclopedia article
• Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, Hans-Christer. (2012) Efficiency in cross-country skiing. A brief review. Meyer & Meyer Sport
  Academic chapter/article/Conference paper
• Sandbakk, Øyvind; Sandbakk, Silvana Bucher; Skovereng, Knut; Welde, Boye; Ettema, Gerardus Johannes C. (2012) The Physiology of World Class Sledge Ice-Hockey.
  Academic chapter/article/Conference paper
• 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/article/Conference paper
• Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Holmberg, HC. (2012) The contribution from poling increases gender differences in elite cross-country skiers.
  Academic chapter/article/Conference paper
• Sandbakk, Øyvind; Bucher Sandbakk, Silvana; Ettema, Gerardus Johannes C; Welde, Boye. (2012) Effects of intensity and duration in aerobic high-intensity interval training.
  Academic chapter/article/Conference paper
• 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
• 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
• Supej, Matej; Oggiano, Luca; Ettema, Gerardus Johannes C; Holmberg, H.C.. (2012) Differences in air drag among elite male alpine skiers. Meyer & Meyer Sport
  Academic chapter/article/Conference paper

2011

• 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
• 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; 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
• 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; Sandbakk, Øyvind; Leirdal, Stig. (2011) Maximal aerobic capacity and efficiency in world class sprint skiers using the double poling and G3 skating technique.
  Other
• 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.
  Other
• Leirdal, Stig; Ettema, Gerardus Johannes C. (2011) Pedaling technique and energy cost in cycling.
  Other
• 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
  Abstract
• 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; 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
• 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

2010

• Sandbakk, Øyvind; Leirdal, Stig; Ettema, Gerardus Johannes C. (2010) Effect of frequency in roller ski skating.
  Other
• Sandbakk, Øyvind; Ettema, Gerardus Johannes C; Leirdal, Stig; Holmberg, Hans-Christer. (2010) Physiological gender differences associated with sprint skiing performance.
  Other
• 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
  Abstract
• 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

2009

• Ettema, Gerardus Johannes C; Lorås, Håvard Wuttudal. (2009) Efficiency in cycling: a review. European Journal of Applied Physiology
  Academic literature review
• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2009) Is there a proximal-to-distal sequence in overarm throwing in team handball?. Journal of Sports Sciences
  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
• 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
• 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
• Tillaar, Roland van den; 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
• Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) On the relationship between gross efficiency and force effectiveness during ergometer cycling.
  Other
• Ettema, Gerardus Johannes C. (2009) Inertial loading in level and uphill cycling.
  Other
• Ettema, Gerardus Johannes C; Sandbakk, Øyvind; Leirdal, Stig; Holmberg, HC. (2009) Efficiency at high work rates in world class skiers.
  Other
• Sandbakk, Øyvind; Leirdal, Stig; Holmberg, HC; Ettema, Gerardus Johannes C. (2009) The physiology of world class sprint skiers.
  Other
• Leirdal, Stig; Ettema, Gerardus Johannes C. (2009) Freely chosen cadence and gross efficiently during ergometer and free bicycling.
  Other
• Ettema, Gerardus Johannes C; McGhie, David; Olsen, Kristian Killi; Lillemark, Kristian. (2009) The effect of body orientation om cycling technique.
  Other
• Leirdal, Stig; Sandbakk, Øyvind; Holmberg, HC; Ettema, Gerardus Johannes C. (2009) Sub-maximal efficiency during roller ski skating.
  Other
• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2009) A Comparison of Successful and Unsuccessful Attempts in Maximal Bench Pressing. Medicine & Science in Sports & Exercise
  Academic article
• van den Tillaar, Roland ; Ettema, Gerardus Johannes C. (2009) Acomparison of successful and unsuccessful attempts in 1RM bench press.
  Other

2008

• Ettema, Gerardus Johannes C; Gløsen, Tommy; Tillaar, Roland van den. (2008) Effect of specific strength training on overarm throwing performance. International Journal of Sports Physiology and Performance (IJSPP)
  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. Springer Publishing Company
  Academic chapter/article/Conference paper
• 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
• Leirdal, Stig; Roeleveld, Karin; Ettema, Gerardus Johannes C. (2008) Coordination Specificity in Strength and Power Training. International Journal of Sports Medicine (IJSM)
  Academic article

2007

• Ettema, Gerardus Johannes C; Bråten, Steinar. (2007) On the role of the location of centre of mass in ski jumping.
  Academic chapter/article/Conference paper
• Ettema, Gerardus Johannes C; Hooiveld, Jo; Bråten, Steinar; Bobbert, Maarten F. (2007) The possible use of horizontal propulsion in imitation ski jumps.
  Academic chapter/article/Conference paper
• 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
• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2007) A three-dimensional analysis of overarm throwing in experienced handball players. Journal of Applied Biomechanics
  Academic article

2006

• Leirdal, Stig; Sætran, Lars Roar; Roeleveld, Karin; Vereijken, Beatrix; Bråten, Steinar; Bråten, Steinar. (2006) Effects of Body Position on Slide Boarding Performance by Cross-Country Skiers. Medicine & Science in Sports & Exercise
  Academic article
• Tillaar, Roland van den; 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
• Kristensen, Geir Olav; Tillaar, Roland van den; 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
  Masters thesis
• Tillaar, Roland van den; 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/article/Conference paper
• Ettema, Gerardus Johannes C. (2006) On the proximal-distal sequence in explosive actions: the role of transfer of momentum.
  Academic chapter/article/Conference paper
• Sommervoll, Yngve; Ettema, Gerardus Johannes C. (2006) A comparison of male throwing athletes and unskilled males when performing an overarm throwing task.
  Academic chapter/article/Conference paper
• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2006) The sticking point in bench pressing.
  Academic chapter/article/Conference paper
• Ettema, Gerardus Johannes C; Bråten, Steinar. (2006) On the role of the location of centre of mass in ski jumping.
  Academic chapter/article/Conference paper

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

• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
  Academic article
• Tillaar, Roland van den; 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, R; Ettema, Gerardus Johannes C. (2004) Effect of body size and gender in overarm throwing performance. European Journal of Applied Physiology
  Academic article

2003

• van den Tillaar, R; 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, Roland van den; 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
• Leirdal, Stig; Ettema, Gerardus Johannes C. (2003) Utholdenhet: Energifrigjøring, prestasjonsfaktorer, trening, tilpasninger og testing. Pensum Topptrenerstudiet Olympiatoppen-NTNU. [Mangler utgivernavn]
  Compendium
• Tillaar, Roland van den; Ettema, Gerardus Johannes C. (2003) Influence of instruction on velocity and accuracy of overarm throwing. Perceptual and Motor Skills
  Academic article

2002

• Ettema, Gerardus Johannes C. (2002) Effects of contraction history on control and stability in explosive actions. Journal of Electromyography & Kinesiology
  Academic article
• Toussaint, Gerthory; Pedersen, Atle; Oterhals, Geir; Fiskvik, Anne Margrete; Ettema, Gerardus Johannes C; Bongaardt, Robert. (2002) La det swinge! Om kropp og bevegelse. Tapir Akademisk Forlag
  Academic chapter/article/Conference paper

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; Meijer, Kenneth. (2000) Muscle contraction history: modified Hill versus an exponential decay model. Biological cybernetics
  Academic article
• Ettema, Gerardus Johannes C. (2000) WinLab - a signal analysis package for MatLab.
  Software
• Ettema, Gerardus Johannes C. (2000) Stability - ver.04 Muscle-joint model for simulation of coordinated movement.
  Software
• Ettema, Gerardus Johannes C. (2000) Physiological and biomechanical constraints: muscle mechanics & motor action. [Mangler utgivernavn]
  Compendium
• Ettema, Gerardus Johannes C. (2000) Biomechanics: classic mechanics applied to the musculoskeletal system in a functional setting. [Mangler utgivernavn]
  Compendium
• Ettema, Gerardus Johannes C. (2000) Motor behaviour: notes on neuro-physiology. [Mangler utgivernavn]
  Compendium

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. (1999) Modelling skeletal muscle-tendon units as actuators in motor behaviour: morphological aspects. Corpus, Psyche et Societas
  Academic article
• Ettema, Gerardus Johannes C. (1999) SIM-MH ver.04 Simulation package on muscle contraction mechanisms.
  Software
• Ettema, Gerardus Johannes C; Roeleveld, Karin; Tillaar, Roland van den. (1999) Biologi i Grunnfag Idrett (IDR105) på internet. [Mangler utgivernavn]
  Compendium

1998

• 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; 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
• Ettema, Gerardus Johannes C. (1998) MuscSim - A muscle contraction and movement simulation package for students, in Matlab.
  Software

1997

• 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. (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) The Human Musculoskeletal System. [Mangler utgivernavn]
  Compendium

1996

• 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
• Ettema, Gerardus Johannes C. (1996) Innovations in teaching musculoskeletal anatomy. [Mangler utgivernavn]
  Report
• Ettema, Gerardus Johannes C; Kippers, Vaughan. (1996) Proceedings of the 1996 Conference of the anatomical society of Australia and New Zealand. [Mangler utgivernavn]
  Report