Blar i NTNU Open på forfatter "Helgerud, Jan"
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Maximal strength training in patients with inflammatory rheumatic disease: implications for physical function and quality of life
Haglo, Håvard Pedersen; Berg, Ole Kristian; Hoff, Jan; Helgerud, Jan; Wang, Eivind (Journal article; Peer reviewed, 2022)Purpose: Patients with inflammatory rheumatic disease (IRD) have attenuated muscle strength in the lower extremities, resulting in impaired physical function and quality of life. Although maximal strength training (MST), ... -
Maximal Strength Trainings Effect on Pulmonary Function, Physical Performance, and Quality of Life in COPD Patients
Aune, Andreas Ingebrigtsen (Master thesis, 2023)Sammendrag Bakgrunn Kronisk Obstruktiv Lungesykdom (KOLS) er den tredje ledende årsaken til dødsfall i verden, og bidrar til et stadig økende økonomisk press på det globale helsevesenet. KOLS karakteriseres av gradvis ... -
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. ... -
Prediction of upper extremity peak oxygen consumption from heart rate during submaximal arm cycling in young and middle-aged adults
Helgerud, Jan; Øiestad, Britt Elin; Wang, Eivind; Hoff, Jan (Peer reviewed; Journal article, 2019)Based on the strong linear relationship between heart rate (HR) and oxygen consumption, the Åstrand–Ryhming cycle ergometer test (Astrand and Ryhming in J Appl Physiol 7:218–221, 1954) is a widely used submaximal test to ... -
Prediction of VO2max from submaximal exercise using the smartphone application myworkout GO : validation study of a digital health method
Helgerud, Jan; Haglo, Håvard Pedersen; Hoff, Jan (Peer reviewed; Journal article, 2022)Background: Physical inactivity remains the largest risk factor for the development of cardiovascular disease worldwide. Wearable devices have become a popular method of measuring activity-based outcomes and facilitating ... -
Reduced peak oxygen uptake and implications for cardiovascular health and quality of life in patients with schizophrenia
Heggelund, Jørn; Hoff, Jan; Helgerud, Jan; Nilsberg, Geir Erling; Morken, Gunnar (Journal article; Peer reviewed, 2011)Background: Peak oxygen uptake (VO2peak) is a strong predictor of cardiovascular disease (CVD) and all-cause mortality, but is inadequately described in patients with schizophrenia. The aim of this study was to ... -
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 ... -
Reliability of forearm oxygen uptake during handgrip exercise : assessment by ultrasonography and venous blood gas
Nyberg, Stian Kwak; Berg, Ole Kristian; Helgerud, Jan; Wang, Eivind (Journal article; Peer reviewed, 2018)Assessment of forearm oxygen uptake (O2) during handgrip exercise is a keenly investigated concept for observing small muscle mass metabolism. Although a combination of Doppler ultrasound measurements of brachial artery ... -
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 ... -
Smartphone-assisted high-intensity interval training in inflammatory rheumatic disease patients : randomized controlled trial
Haglo, Håvard Pedersen; Wang, Eivind; Berg, Ole Kristian; Hoff, Jan; Helgerud, Jan (Peer reviewed; Journal article, 2021)Background: Patients with inflammatory rheumatic diseases (IRDs) experience disease-related barriers to physical training. Compared with the general population, IRD patients are reported to have reduced maximal oxygen ... -
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 ... -
Supramaximal Interval Training Does Not Improve VO2max in Moderately Trained Females.
Finsås, Lars Olav Telle (Master thesis, 2020)Abstract Aim: The present study examined the effects of 10 x 30-second and 8 x 20-second supramaximal interval training (SIT) on maximal oxygen consumption (VO2max), running economy (RE), lactate threshold (LT), anaerobic ... -
Tabata Training Does Not Improve Maximal Oxygen Uptake in Well-trained Women
Hov, Håkon (Master thesis, 2019)Hensikt: Å sammenligne effekten av 8 x 20 sekunder supramaksimal Tabatatrening (TT) med 4 x 4 minutter høyintensitetsintervaller (HIIT) på 90 - 95% av HRmax på godt trente kvinner. Metode: 12 friske og godt trente kvinner ... -
Tabata vs. 4 x 4 HIIT: What is the difference and which is better for improving VO2max in moderately trained females
Mehus, Håkon Andrè (Master thesis, 2020)Aim: the aim of the present study was to investigate the effect of 4 x 4 high-intensity interval training (HIIT) versus running Tabata on endurance performance and it`s determinants in moderately trained females. Methods: ... -
The effect of uncompensable heat stress on heat tolerance, physiological and subjective parameters in females and males wearing firefighting personal protective equipment
Lignier, Maxime Jeanovitch (Master thesis, 2021)The present study investigated the effect of a uncompensable heat stress (UHS) situation on heat tolerance, physiological and perceptual parameters in females and males wearing firefighting personal protective equipment ... -
The effects of Exercise Modality: Cycling and Running on Stroke Volume in Well-Trained Male Cyclists
Murillo, Keli Rivera (Master thesis, 2012)Background: It was attempted to test whether the Stroke Volume (SV) response rises during incremental exercise to the maximum oxygen consumption (VO2max) and whether SV response differs between cycling and running in ... -
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 (ϵ net ) is an accurate measure often used to evaluate walking performance. Patients with gait ...