Blar i Brage NIH på forfatter "Hallén, Jostein"

Viser treff 21-30 av 30

    • Muscular exercise capacity and body fat predict VO2peak in heart transplant recipients 

      Nytrøen, Kari; Rustad, Lene Annette; Gude, Einar; Hallén, Jostein; Fiane, Arnt E.; Rolid, Katrine; Holm, Inger; Aakhus, Svend; Gullestad, Lars (Journal article; Peer reviewed, 2012-06-01)
      Heart transplant (HTx) recipients usually have reduced exercise capacity, with reported VO2peak levels of 50–70% of predicted values. This study aimed to evaluate central and peripheral factors predictive of VO2peak. ...

    • Peripheral adaptations to endurance training - Effect of active muscle mass 

      Mølmen, Knut Sindre; Hallén, Jostein; Rud, Bjarne (Peer reviewed; Journal article, 2019)
      The purpose of this study was to evaluate whether adaptations to endurance training are affected by active muscle mass during training. Eleven healthy subjects performed 5 weeks of one‐legged knee extension (1‐KE) training ...

    • Physiological differences between sprint- and distance-specialized cross-country skiers 

      Losnegard, Thomas; Hallén, Jostein (Journal article; Peer reviewed, 2014)
      Purpose: Sprint- (≤1.8 km) and distance-skiing (≥15 km) performance rely heavily on aerobic capacity. However, in sprint skiing, due to the ~20% higher speed, anaerobic capacity contributes significantly. This study aimed ...

    • Technique analysis in elite athletes using principal component analysis 

      Gløersen, Øyvind Nøstdahl; Myklebust, Håvard; Hallén, Jostein; Federolf, Peter Andreas (Journal article; Peer reviewed, 2018)
      The aim of this study was to advance current movement analysis methodology to enable a technique analysis in sports facilitating (1) concurrent comparison of the techniques between several athletes; (2) identification of ...

    • The influence of pole length on performance, O2-cost and kinematics in double poling 

      Losnegard, Thomas; Myklebust, Håvard; Skattebo, Øyvind; Stadheim, Hans Kristian; Sandbakk, Øyvind; Hallén, Jostein (Journal article; Peer reviewed, 2016-04-27)
      Purpose: In the double poling cross-country skiing technique, the propulsive forces are transferred solely through the poles. The aim of the present study was to investigate how pole length influences double poling ...

    • Training effects on skeletal muscle calcium handling in human chronic heart failure 

      Munkvik, Morten; Rehn, Tommy A.; Slettaløkken, Gunnar; Hasic, Almira; Hallén, Jostein; Sjaastad, Ivar; Sejersted, Ole M.; Lunde, Per Kristian (Journal article; Peer reviewed, 2010-05)
      Purpose: Patients with chronic heart failure (CHF) typically complain about skeletal muscle fatigue. In rat experiments, reduced intracellular calcium release seems to be related to fatigue development in normal skeletal ...

    • Upper body heavy strength training does not affect performance in junior female cross-country skiers 

      Skattebo, Øyvind; Hallén, Jostein; Rønnestad, Bent; Losnegard, Thomas (Journal article; Peer reviewed, 2015-07-06)
      We investigated the effects of adding heavy strength training to a high volume of endurance training on performance and related physiological determinants in junior female cross-country skiers. Sixteen well-trained athletes ...

    • Validation of ActiReg (R) to measure physical activity and energy expenditure against doubly labelled water in obese persons 

      Hustvedt, Bo-Egil; Svendsen, Mette; Løvø, Arne; Ellegård, Lars; Hallén, Jostein; Tonstad, Serena (Peer reviewed; Journal article, 2008-01-15)
      ActiReg® is an instrument that uses combined recordings of body position and motion to calculate energy expenditure (EE) and physical activity (PA). The aim of the study was to compare mean total energy expenditure (TEE) ...

    • Variability and predictability of performance times of elite cross-country skiers 

      Spencer, Matt; Losnegard, Thomas; Hallén, Jostein; Hopkins, Will G. (Journal article; Peer reviewed, 2014-01)
      Analyses of elite competitive performance provide useful information for research and practical applications. Purpose: Here the authors analyze performance times of cross-country skiers at international competitions (World ...

    • Young athlete's growing heart: Sex differences in cardiac adaptation to exercise training during adolescence 

      Forså, Marianne Inngjerdingen; Bjerring, Anders W.; Haugaa, Kristina Ingrid Helena Hermann; Smedsrud, Marit Kristine; Landgraff, Hege Elisabeth W.; Hallén, Jostein; Sarvari, Sebastian Imre; Edvardsen, Thor (Peer reviewed; Journal article, 2023)
      Background: Athlete’s heart is a condition of exercise-induced cardiac remodelling. Adult male endurance athletes more often remodel beyond reference values. The impact of sex on remodelling through adolescence remains ...