Blar i NTNU Open på forfatter "Ettema, Gertjan"
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The effect of barbell-type on physical load in deadlift
Grostad, Håvard (Master thesis, 2013)Purpose: The purpose of this study was to investigate the influence of barbell type on lifting technique and muscle and joint load during submaximal weights in deadlift. Method: Barbells from olympic weightlifting (OWL) ... -
The effect of cadence on shank muscle oxygen consumption and deoxygenation in relation to joint specific power and cycling kinematics
Skovereng, Knut; Ettema, Gertjan; Van Beekvelt, Mireille (Journal article; Peer reviewed, 2017)The purpose of the present study was to investigate the effect of cadence on joint specific power and cycling kinematics in the ankle joint in addition to muscle oxygenation and muscle VO2 in the gastrocnemius and tibialis ... -
The effect of exercise intensity on joint power and dynamics in ergometer double-poling performed by cross-country skiers
Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan (Journal article; Peer reviewed, 2017)The purpose of this study was to examine the effect of increasing exercise intensity on the role of joint powers in ergometer double poling (DP), while taking specific dynamic constraints into account. One main question ... -
The effect of exhaustive exercise on the choice of technique and physiological response in classical roller skiing
Ettema, Gertjan; Øksnes, Magne; Kveli, Espen; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)Purpose The aim of this study was to investigate the effect of exhaustive exercise on technique preference and the accompanying physiological response during classic skiing at constant workload, but with varying incline–speed ... -
The effect of intensity and stroke rate on timing and coordination during ergometer rowing
Ludvigsen, Tonje Pedersen (Master thesis, 2020)Formål: Hensikten med denne studien er å undersøke den individuelle og kombinerte effekten av intensitet og ro-takt på mekaniske og elektromyografiske (EMG) utfallsvariabler (dvs. amplitude og tidshendelser) og tidsprofiler ... -
The Effect of Intensity on Joint-Specific Power and Mechanical Energy during Double Poling in Elite Cross-Country Skiers
Danielsen, Jørgen (Master thesis, 2014)Purpose: The present study examined the absolute behavior and the relative contributions to poling power of 1) joint-specific powers and 2) total body power (Pbody, i.e. the rate of change in total body mechanical ... -
The Effect of Maximal Speed Ability, Pacing Strategy, and Technique on the Finish Sprint of a Sprint Cross-Country Skiing Competition
Haugnes, Pål; Torvik, Per Øyvind; Ettema, Gertjan; Kocbach, Jan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)Purpose: The aims of this study were to investigate the contribution from maximal speed (Vmax) and %Vmax to the finish-sprint speed obtained in a cross-country (XC) sprint in the classical and skating style, as well as ... -
The effect of strength and absolute load on position variability in isometric position tasks
Dretvik, Trond Michael (Master thesis, 2012)The purpose of this study was to investigate the relationship between strength and position control, with an emphasis on measurements at low, absolute levels of force, as well as to examine the effect of load on position ... -
The effects of an exhausting exercise on physiological responses and technique in elite cross-country skiers
Åsan, Christina Andreassen (Master thesis, 2013)The ability to reproduce a high energy delivery capacity and an efficient conversion of energy to work rate and speed, is essential for performance in sports with several competitions during a day, such as in cross-country ... -
The effects of gender, performance level and exercise mode on performance among elite cross-country skiers
Hegge, Ann Magdalen (Doctoral thesis at NTNU;2016:145, Doctoral thesis, 2016) -
The effects of poling on energy consumption, kinematics and kinetics in roller ski skating
Grasaas, Erik (Master thesis, 2013)The current study investigated the effect of poling on physiological, kinematic and kinetic responses at different velocities by comparing the G4 skating technique with (G4-P) and without (G4-NP) poling. The G4 involves a ... -
The influence of increased distal loading on metabolic cost, efficiency, and kinematics of roller ski skating
Bolger, Conor; Bessone, Veronica; Federolf, Peter Andreas; Ettema, Gertjan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)The purpose of the present study was to examine the influence of increased loading of the roller ski on metabolic cost, gross efficiency, and kinematics of roller ski skating in steep and moderate terrain, while employing ... -
The influence of power and external load on choice of technique in classical roller-skiing
Elvevold Ritman, Tobias (Master thesis, 2021)Formål: I klassisk stil i langrenn er det tre hovedteknikker som er diagonal gang (DG), staking (ST) og staking med fraspark (STF). I klassisk stil, brukes ulike delteknikker mest avhengig av terreng. Hensikten med denne ... -
The influence of technique, strength and power on submaximal force production and gross efficiency during isolated upper-body poling in cross-country skiers
Hansen, Mads (Master thesis, 2013)Previous studies have shown that upper-body strength and power are associated with work economy or efficiency in various types of locomotion. However, isolated upper-body work has not yet been investigated, and the mechanisms ... -
The Interval-Based Physiological and Mechanical Demands of Cross-Country Ski Training
Haugnes, Pål; Kocbach, Jan; Luchsinger, Harri; Ettema, Gertjan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2019)PURPOSE: To investigate fluctuations in speed, work rate and heart rate (HR) when cross-country (XC) ski skating across varying terrain at different endurance training intensities. METHODS: Seven male Norwegian junior ... -
The relationship between performance in core exercises and performance ability in ski jumping : a cross-sectional study of competitive ski jumpers
Norwich, Andreas Tørum (Master thesis, 2017)Background: The concept of core stability and balance are emphasized during athletic training for Norwegian ski jumpers. The impression of how important it can be for sport performance has long been a matter of interest ... -
The role of incline, performance level and gender on the gross mechanical efficiency of roller ski skating
Sandbakk, Øyvind; Hegge, Ann Magdalen H. S.; Ettema, Gertjan (Journal article; Peer reviewed, 2013)The ability to efficiently utilize metabolic energy to produce work is a key factor for endurance performance. The present study investigated the effects of incline, performance level, and gender on the gross mechanical ... -
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
Dahl, Christine; Sandbakk, Øyvind; Danielsen, Jørgen; Ettema, Gertjan (Journal article; Peer reviewed, 2017)In classical cross-country skiing, diagonal stride (DIA) is the major uphill sub-technique, while double poling (DP) is used on relatively flat terrain. Although, the dependence of incline and speed on the preference of ... -
The role of speed and incline in the spontaneous choice of technique in classical roller-skiing
Ettema, Gertjan; Kveli, Espen; Øksnes, Magne; Sandbakk, Øyvind (Journal article, 2017)Cross-country skiers change technique depending on terrain (incline) and effort (work rate; speed at a particular incline or resistance). The literature is not unequivocal about the influence of incline or speed on the ... -
Upper- vs. Lower-Body Exercise Performance in Female and Male Cross-Country Skiers
Hansen, Linda Marie; Sandbakk, Øyvind; Ettema, Gertjan; Baumgart, Julia Kathrin (Peer reviewed; Journal article, 2021)Purpose: To investigate the interaction between exercise modality (i.e., upper- and lower-body exercise) and sex in physiological responses and power output (PO) across the entire intensity spectrum (i.e., from low to ...