Browsing Institutt for friluftsliv, idrett og kroppsøving by Author "Helgerud, Jan"
Now showing items 1-13 of 13
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Aerobic and anaerobic speed predicts 800-m running performance in young recreational runners
Støren, Øyvind; Helgerud, Jan; Johansen, Jan-Michael; Gjerløw, Lars Erik; Aamlid, Aanund; Støa, Eva Maria (Peer reviewed; Journal article, 2021)The main aim was to investigate the impact of maximal aerobic speed (MAS), maximal anaerobic speed (MANS), and time to exhaustion (TTE) at 130% MAS, on 800-m running time performance (800TT). A second aim was to investigate ... -
Arm crank and wheelchair ergometry produce similar peak oxygen uptake but different work economy values in individuals with spinal cord injury
Tørhaug, Tom; Brurok, Berit; Hoff, Jan; Helgerud, Jan; Leivseth, Gunnar (Peer reviewed; Journal article, 2016)Objective. To study whether values for peak oxygen uptake (VO2peak) and work economy (WE) at a standardized workload are different when tested by arm crank ergometry (ACE) and wheelchair ergometry (WCE). Methods. Twelve ... -
Effect of Aerobic Exercise Intensity on Energy Expenditure and Weight Loss in Severe Obesity—A Randomized Controlled Trial
Berge, Jarle; Hjelmesæth, Jøran; Hertel, Jens Kristoffer; Gjevestad, Espen Svendsen; Småstuen, Milada Cvancarova; Johnson, Line Kristin; Martins, Catia; Andersen, Eivind; Helgerud, Jan; Støren, Øyvind (Journal article; Peer reviewed, 2021)Objective: This study aimed to compare the effects of two aerobic exercise programs of different intensities on energy expenditure. Methods: This was a single‐center randomized controlled trial of patients with severe ... -
Effect of aerobic exercise intensity on health-related quality of life in severe obesity: a randomized controlled trial
Berge, Jarle; Hjelmesæth, Jøran Sture; Kolotkin, Ronette Loganzo; Støren, Øyvind; Bratland-Sanda, Solfrid; Hertel, Jens Kristoffer; Gjevestad, Espen Svendsen; Småstuen, Milada Cvancarova; Helgerud, Jan; Bernklev, Tomm (Peer reviewed; Journal article, 2022)Background: Aerobic exercise is an important part of obesity treatment and may improve health-related quality of life (HRQOL). The objective of this study was to compare the effect of two different exercise programs on ... -
Effect of lower extremity functional electrical stimulation pulsed isometric contractions on arm cycling peak oxygen uptake in spinal cord injured individuals
Brurok, Berit; Tørhaug, Tom; Karlsen, Trine; Leivseth, Gunnar; Helgerud, Jan; Hoff, Jan (Journal article; Peer reviewed, 2013)Objective: To compare peak oxygen uptake (VO2peak) between: (i) functional electrical stimulation lower extremity pulsed isometric muscle contractions combined with arm cycling (FES iso hybrid), (ii) functional electrical ... -
Effects of individual changes in training distribution on maximal aerobic capacity in well-trained cross-country skiers: A follow-up study
Johansen, Jan-Michael; Sunde, Arnstein; Helgerud, Jan; Gjerløw, Lars Erik; Støren, Øyvind (Peer reviewed; Journal article, 2021)The purpose of this study was to evaluate individual changes in training distribution and the subsequent effects on maximal oxygen uptake (VO2max). The participants were well-trained cross-country skiers who had performed ... -
Factors Influencing Running Velocity at Lactate Threshold in Male and Female Runners at Different Levels of Performance
Støa, Eva Maria; Helgerud, Jan; Rønnestad, Bent; Hansen, Joar; Ellefsen, Stian; Støren, Øyvind (Peer reviewed; Journal article, 2020)Background: The primary aim was to examine the relationship between lactate threshold (LT) expressed as percentage of maximal oxygen uptake (VO2max) and running velocity at LT (LTV). A secondary aim was to investigate to ... -
Improving Utilization of Maximal Oxygen Uptake and Work Economy in Recreational Cross-Country Skiers With High-Intensity Double-Poling Intervals
Johansen, Jan-Michael; Eriksen, Sondre; Sunde, Arnstein; Slettemeås, Øystein; Helgerud, Jan; Støren, Øyvind (Journal article; Peer reviewed, 2020)Purpose: To investigate the effect of a double-poling (DP) high-intensity aerobic interval-training (HIT) intervention performed without increasing total HIT volume. This means that regular HIT training (eg, running) was ... -
No change – no gain; The effect of age, sex, selected genes and training on physiological and performance adaptations in cross-country skiing
Johansen, Jan-Michael; Goleva-Fjellet, Sannija; Sunde, Arnstein; Gjerløw, Lars Erik; Skeimo, Lars Arne Fostvedt; Freberg, Baard Ingegerdsson; Sæbø, Mona; Helgerud, Jan; Støren, Øyvind (Peer reviewed; Journal article, 2020)The aim was to investigate the effect of training, sex, age and selected genes on physiological and performance variables and adaptations before, and during 6 months of training in well-trained cross-country skiers. ... -
Relationships Between Maximal Aerobic Speed, Lactate Threshold, and Double Poling Velocity at Lactate Threshold in Cross-Country Skiers
Johansen, Jan-Michael; Sunde, Arnstein; Helgerud, Jan; Støren, Øyvind (Peer reviewed; Journal article, 2022)Purpose: To investigate the relationships between maximal aerobic speed (MAS), lactate threshold in per cent of peak oxygen uptake (LT) and velocity at LT (LTv) in cross-country skiers. Secondly, we aimed to explore the ... -
Responses to Maximal Strength Training in Different Age and Gender Groups
Hans Torvild, Kittilsen; Goleva-Fjellet, Sannija; Freberg, Baard Ingegerdsson; Nicolaisen, Iver; Støa, Eva Maria; Bratland-Sanda, Solfrid; Helgerud, Jan; Wang, Eivind; Sæbø, Mona; Støren, Øyvind (Peer reviewed; Journal article, 2021)Purpose: The present study aimed to investigate the potential impact of age, gender, baseline strength, and selected candidate polymorphisms on maximal strength training (MST) adaptations. Methods: A total of 49 subjects ... -
Stronger Is Better: The Impact of Upper Body Strength in Double Poling Performance
Sunde, Arnstein; Johansen, Jan-Michael; Gjøra, Martin; Paulsen, Gøran; Bråten, Morten; Helgerud, Jan; Støren, Øyvind (Journal article; Peer reviewed, 2019)The purpose of the present study was to compare time results from a roller-skiing double poling (DP) time trial with different physiological variables, muscular strength variables, and DP characteristics in both male and ... -
Therapeutic effects of maximal strength training on walking efficiency in patients with schizophrenia - a pilot study
Heggelund, Jørn; Morken, Gunnar; Helgerud, Jan; Nilsberg, Geir Erling; Hoff, Jan (Journal article; Peer reviewed, 2012)Background: Patients with schizophrenia frequently have disabling gait deficits. The net mechanical efficiency of walking (Enet) is an accurate measure often used to evaluate walking performance. Patients with gait deficits ...