Browsing NTNU Open by Author "Ettema, Gertjan"
Now showing items 21-40 of 79
-
Effects of upper-body sprint-interval training on strength and endurance capacities in female cross-country skiers
Vandbakk, Kristine; Welde, Boye; Hovstein, Andrea; Baumgart, Julia Kathrin; Ettema, Gertjan; Karlsen, Trine; Sandbakk, Øyvind (Journal article; Peer reviewed, 2017)This study compared the effects of adding upper-body sprint-intervals or continuous double poling endurance training to the normal training on maximal upper-body strength and endurance capacity in female cross-country ... -
En sammenligning av mekanikk ved 100- og 400-m sprint
Halsen, Adrian; Søreide, Felix Jakobsen; Silfverhielm, Mathias Mutlak-Hamdan (Bachelor thesis, 2023)Abstrakt Formålet med studiet Denne studien tar sikte på å sammenligne mekanikken i 100-meter og 400-meter sprint ved å undersøke ulike mekaniske variabler. Metode Det ble gjennomført et litteratursøk ved bruk av ... -
Energetic cost of double poling and diagonal stride in classical cross-country skiing at different speed-slope combinations: A literature review
Kristensen, Henrik Berg; Glomnes, Kornelius Linge; Welde, Ottar Brohaug (Bachelor thesis, 2023)Formålet med denne litteraturstudien er å: 1) skaffe en oversikt over hvilke under-teknikker i klassisk langrenn (staking, diagonalgang) som gir mest fordelaktig “energetic cost” (EC), dvs. lave energikostnader og høy ... -
Examination of gas exchange and blood lactate thresholds in Paralympic athletes during upper-body poling
Baumgart, Julia Kathrin; Moes, Maaike; Skovereng, Knut; Ettema, Gertjan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)Objectives The primary aim was to compare physiological and perceptual outcome parameters identified at common gas exchange and blood lactate (BLa) thresholds in Paralympic athletes while upper-body poling. The secondary ... -
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"
Haugnes, Pål; Kocbach, Jan; Torvik, Per Øyvind; Ekren, Thomas; Ettema, Gertjan; Sandbakk, Øyvind (Research report, 2017) -
How hinge positioning in cross-country ski bindings affect exercise efficiency, cycle characteristics and muscle coordination during submaximal roller skiing
Bolger, Conor; Sandbakk, Øyvind; Ettema, Gertjan; Federolf, Peter Andreas (Peer reviewed; Journal article, 2016)The purposes of the current study were to 1) test if the hinge position in the binding of skating skis has an effect on gross efficiency or cycle characteristics and 2) investigate whether hinge positioning affects synergistic ... -
Imitation jumps in ski jumping: Technical execution and relationship to performance level
Ettema, Gertjan; Braaten, Steinar; Danielsen, Jørgen; Fjeld, Birk Eirik (Peer reviewed; Journal article, 2020)Imitation jumps are frequently used in training for ski jumping. Yet, the dynamics of these jumps differ considerably. Thus, the relevance of imitation jumps for ski jumping performance is not elucidated. The aim of this ... -
The influence of race tactics for performance in the heats of an international sprint cross-country skiing competition
Haugnes, Pål; Kocbach, Jan; Kjøsen Talsnes, Rune; Noordhof, Dionne; Ettema, Gertjan; Sandbakk, Øyvind (Peer reviewed; Journal article, 2022)The purpose of this study was to examine the influence of race tactics for performance in the heats of an international sprint cross-country (XC) skiing competition in the classical style. Thirty elite male XC skiers (age: ... -
The influence of tactical positioning on performance in sprint cross-country skiing
Haugnes, Pål; Kocbach, Jan Martin; Noordhof, Dionne Adriana; Kjøsen Talsnes, Rune; Ettema, Gertjan; Sandbakk, Øyvind Bucher (Peer reviewed; Journal article, 2023)The purpose of this study was to examine the influence of tactical positioning on performance in the heats of sprint cross-country (XC) skiing among men and women and the consistency of overtaking events over repeated ... -
Is There a Trade-Off Between Maximum Jumping and Throwing Capability in the Handball Jump Throw?
McGhie, David; Sandbakk, Øyvind; Østerås, Sindre; Ettema, Gertjan (Journal article; Peer reviewed, 2019)This study examined the potential trade-off in performance between maximum physical capabilities in the handball jump throw, a fundamental skill comprised of two mechanically independent tasks. Elite handball players ... -
Joint specific power production in cycling : the effect of cadence and athlete level
Aasvold, Lorents Ola (Master thesis, 2017)Introduction: Low cadence (<60 rpm) interval training is a commonly used training method among cyclists. The effect of cadence and work rate on the joint specific power production in cycling has previously been studied, ... -
Joint specific power production in cycling: The effect of cadence and intensity
Aasvold, Lorents Ola; Ettema, Gertjan; Skovereng, Knut (Journal article; Peer reviewed, 2019)Background The effect of cadence and work rate on the joint specific power production in cycling has previously been studied, but research has primarily focused on cadences above 60 rpm, without examining the effect of ... -
Kinematic Determination of the Aerial Phase in Ski Jumping
Elfmark, Ola; Ettema, Gertjan; Jølstad, Petter Andre; Gilgien, Matthias (Peer reviewed; Journal article, 2022)The purpose of this study was to find a generic method to determine the aerial phase of ski jumping in which the athlete is in a steady gliding condition, commonly known as the ‘stable flight’ phase. The aerial phase of ... -
Kinematic stride cycle asymmetry is not associated with sprint performance and injury prevalence in athletic sprinters
Haugen, Thomas; Danielsen, Jørgen; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan (Journal article; Peer reviewed, 2017)The aims of this study were to (a) quantify the magnitude of kinematic stride cycle asymmetry in high-level athletic sprinters, (b) explore the association between kinematic asymmetry and maximal sprint running performance, ... -
Local muscle oxygen consumption and the relationship with joint specific power in cycling
Skovereng, Knut (Doctoral theses at NTNU;2016:307, Doctoral thesis, 2016)Sykling er en aktivitet som, fra et teknisk synspunkt, anses å være ganske enkel. Men de tre leddene som hovedsaklig er involvert i sykling gir muligheter for flere frihetsgrader, og derfor kan teknikkendringer oppstå. En ... -
Mechanical energetics and dynamics of uphill double-poling on roller-skis at different incline-speed combinations
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David; Ettema, Gertjan (Journal article; Peer reviewed, 2019)Objectives The purpose of this study was to investigate the effect of different incline-speed combinations, at equal external power outputs, on the mechanics and energetics of the double-poling (DP) technique in cross-country ... -
Mechanical energy and propulsion mechanics in roller-skiing double-poling at increasing speeds
Danielsen, Jørgen; Sandbakk, Øyvind; McGhie, David Caley Ruud; Ettema, Gertjan (Peer reviewed; Journal article, 2021)Objectives The aim of this study was to examine the effect of speed on mechanical energy fluctuations and propulsion mechanics in the double-poling (DP) technique of cross-country skiing. Methods Kinematics and dynamics ... -
Mechanical Energy in Rowing. The Individual and Combined Effect of Stroke Rate and Intensity on Joint Power and Mechanical Body Power.
Haug, Aurora (Master thesis, 2020)Hensikt: Hovedmålet med dette studiet var å sammenlikne teknikk ved roing på lav, moderat og høy intensitet og frekvens. Den individuelle og kombinerte effekten av økt frekvens og intensitet på leddspesifikk kraftutvikling ... -
Motor control and learning in proximal versus distal effectors: A behavioral window into neuroanatomical and neurophysiological constraints for bilateral communication in the motor system
Aune, Tore Kristian (Doctoral theses at NTNU;2020:164, Doctoral thesis, 2020) -
On the effect of changing handgrip position on joint specific power and cycling kinematics in recreational and professional cyclists
Skovereng, Knut; Aasvold, Lorents Ola; Ettema, Gertjan (Peer reviewed; Journal article, 2020)Introduction In cycling, the utilization of the drops position (i.e. the lowest handlebar position relative to the ground) allows for reduced frontal area, likely improved aerodynamics and thus performance compared to the ...