Blar i NTNU Open på forfatter "Danielsen, Jørgen"
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Acute physiological responses to external versus internal intensity control during a standard "threshold" training session in well trained endurance athletes
Stølan, Sunniva (Master thesis, 2023)Bakgrunn: Utholdenhetsutøvere bruker en rekke ulike strategier for å kontrollere overordnet og akutt treningsintensitet. To ofte brukte metoder for akutt intensitetskontroll i en økt er i) ekstern (fart) og ii) intern ... -
Altitude Training for Performance at Sea Level: Can endurance performance at sea level be improved by physiological adaptations induced by altitude training?
Aanensen, Matias Nikolai Krumsvik; Kvendseth, Aleksander Hole; Stokkmo, Sondre Sebastian Roberto (Bachelor thesis, 2023)Formål: Denne litteraturstudien har som formål å undersøke sammenhengen mellom fysiologiske tilpasninger forårsaket av høydetrening og utholdenhetsprestasjon i lavlandet. Metode: De inkluderte studiene hadde en høydeperiode ... -
Are Females Better Adapted for Ultrarunning Than Males? - A Literature Review
Arnesen, Daniel Nicolai; Norder, Thomas (Bachelor thesis, 2023)Kjønnsforskjellen ved ultraløp er mindre sammenlignet med kortere distanser. Faktorer som muskelsammensetning, nevromuskulær tretthet og substratutnyttelse har blitt foreslått som faktorer som bidrar til denne trenden. I ... -
Case Report: Adjusting Seat and Backrest Angle Improves Performance in an Elite Paralympic Rower
Severin, Cecilia; Danielsen, Jørgen; Erichsen, Jorgen Falck; Eikevåg, Sindre Wold; Steinert, Martin; Ettema, Gertjan; Baumgart, Julia Kathrin (Peer reviewed; Journal article, 2021)Paralympic rowers with functional impairments of the legs and trunk rely on appropriate seat configurations for performance. We compared performance, physiology, and biomechanics of an elite Paralympic rower competing in ... -
A comparison of double poling physiology and kinematics between long-distance and all-round cross-country skiers
Torvik, Per Øyvind; Sandbakk, Øyvind; van den Tillaar, Roland Johannes Wilhelmus; Kjøsen Talsnes, Rune; Danielsen, Jørgen (Peer reviewed; Journal article, 2022)Purpose: The objective of this study was to compare physiological and kinematic responses to double poling (DP) between long-distance (LDS) and all-round (ARS) cross-country skiers. Methods: A number of five world-class ... -
The dynamics of the anaerobic energy contribution during a simulated mass-start competition while roller-ski skating on a treadmill.
Noordhof, Dionne; Danielsson, Marius Lyng; Skovereng, Knut; Danielsen, Jørgen; Seeberg, Trine Margrethe; Haugnes, Pål; Kocbach, Jan; Ettema, Gertjan; Sandbakk, Øyvind (Journal article; Peer reviewed, 2021)The purposes of this study were: 1) to investigate the anaerobic energy contribution during a simulated cross-country (XC) skiing mass-start competition while roller-ski skating on a treadmill; 2) to investigate the ... -
Effect of speed on trunk and upper limb kinematics in manual wheelchair propulsion
Turkki, Veera (Master thesis, 2022)Speed has been shown to affect movement patterns in manual wheelchair propulsion, and previously, mainly predetermined or self-selected submaximal speeds have been studied in non-athletes. This study investigated the effects ... -
Effects of high-intensity training on physiological and hormonal adaptions in well-trained cyclists
Sylta, Øystein; Tønnessen, Espen (red.); Sandbakk, Øyvind; Hammarström, Daniel; Danielsen, Jørgen; Skovereng, Knut; Rønnestad, Bent; Seiler, Stephen (Journal article; Peer reviewed, 2017)Purpose: This study aimed to compare the effects of three different high-intensity training (HIT) models, balanced for total load but differing in training plan progression, on endurance adaptations. Methods: Sixty-three ... -
Effects of initial performance, gross efficiency and VO_2peak characteristics on subsequent adaptations to endurance training in competitive cyclists
Skovereng, Knut; Sylta, Øystein; Tønnessen, Espen; Hammarström, Daniel; Danielsen, Jørgen; Seiler, Stephen; Rønnestad, Bent; Sandbakk, Øyvind (Journal article; Peer reviewed, 2018)The present study investigated the effects of initial levels of cycling performance, peak oxygen uptake (www.frontiersin.orgO2peak) and gross efficiency (GE) on the subsequent adaptations of these variables and their ... -
Energetics and dynamics of double poling cross-country skiing
Danielsen, Jørgen (Doctoral theses at NTNU, 2018:365;, Doctoral thesis, 2018)Summary Cross-country skiing is a complex endurance sport where the skier can choose between several sub-techniques over the course of a race. Essentially, the sub-techniques differ with regard to how propulsive forces ... -
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 ... -
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, ... -
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 ... -
Metabolic Rate and Gross Efficiency in G2 and G3 Roller Ski Skating: Effect of Incline and Work Rate
Vik, Marte (Master thesis, 2023)Bakgrunn: I skøytestil i langrenn er det spekulasjoner om fordeler ved å bruke enten G2- eller G3- teknikk, spesielt i moderat oppoverbakke med lav fart, hvor begge teknikkene favoriseres omtrent likt. Likevel, er det noe ... -
On the existence of step-to-step breakpoint transitions in accelerated sprinting
Ettema, Gerardus Johannes C; McGhie, David; Danielsen, Jørgen; Sandbakk, Øyvind; Haugen, Thomas (Journal article; Peer reviewed, 2016)Accelerated running is characterised by a continuous change of kinematics from one step to the next. It has been argued that breakpoints in the step-to-step transitions may occur, and that these breakpoints are an essential ... -
On the importance of “front-side mechanics” in athletics sprinting
Haugen, Thomas; Danielsen, Jørgen; Alnes, Leif Olav; McGhie, David; Sandbakk, Øyvind; Ettema, Gertjan (Journal article; Peer reviewed, 2017)Practitioners have for many years argued that athletic sprinters should optimise front-side mechanics (leg motions occurring in front of the extended line through the torso) and minimise back-side mechanics. This study ... -
Physiological and Biomechanical Determinants of Sprint Ability Following Variable Intensity Exercise When Roller Ski Skating
Seeberg, Trine Margrethe; Kocbach, Jan; Danielsen, Jørgen; Noordhof, Dionne; Skovereng, Knut; Hatling Haugnes, Pål; Tjønnås, Johannes; Sandbakk, Øyvind Bucher (Peer reviewed; Journal article, 2021)The most common race format in cross-country (XC) skiing is the mass-start event, which is under-explored in the scientific literature. To explore factors important for XC skiing mass-starts, the main purpose of this study ... -
Physiological and Biomechanical Responses to Cross-Country Skiing in Varying Terrain: Low- vs. High-Intensity
Seeberg, Trine Margrethe; Kocbach, Jan; Danielsen, Jørgen; Noordhof, Dionne; Skovereng, Knut; Meyer, Frederic; Sandbakk, Øyvind Bucher (Peer reviewed; Journal article, 2021)The purposes of our study were to investigate the physiological and biomechanical responses to low-intensity (LI) and high-intensity (HI) roller ski skating on varying terrain and compare these responses between training ...