Blar i Publikasjoner fra Cristin på forfatter "Hallén, Jostein"
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Achieving energy balance with a high‐fat meal does not enhance skeletal muscle adaptation and impairs glycaemic response in a sleep‐low training model
Areta, José; Iraki, Juma; Owens, Daniel J.; Joanisse, Sophie; Philp, Andrew; Morton, James P.; Hallén, Jostein (Peer reviewed; Journal article, 2020)Training with low carbohydrate availability (LCHO) has been shown to acutely enhance endurance training skeletal muscle response, but the concomitant energy deficit (ED) in LCHO interventions has represented a confounding ... -
Angiotensin-converting enzyme 2 (SARS-CoV-2 receptor) expression in human skeletal muscle
Perez-Valera, Mario; Martinez-Canton, Miriam; Gallego-Selles, Angel; Gelabert-Rebato, Miriam; Morales-Alamo, David; Santana, Alfredo; Martin-Rodriguez, Saul; Larsen, Steen; Losa-Reyna, Jose; Perez-Suarez, Ismael; Dorado, Cecilia; Curtelin, David; Gonzalez-Henriquez, Juan Jose; Boushel, Robert; Hallén, Jostein; de Pablos-Velasco, Pedro; Freixinet-Gilart, Jorge; Calbet, Jose Antonio Lopez; Galván-Alvarez, Victor; Ponce-Gonzalez, Jesus Gustavo (Peer reviewed; Journal article, 2021)The study aimed to determine the levels of skeletal muscle angiotensin-converting enzyme 2 (ACE2, the SARS-CoV-2 receptor) protein expression in men and women and assess whether ACE2 expression in skeletal muscle is ... -
Blood volume expansion does not explain the increase in peak oxygen uptake induced by 10 weeks of endurance training
Skattebo, Øyvind; Bjerring, Anders W.; Auensen, Marius; Sarvari, Sebastian; Cumming, Kristoffer Toldnes; Capelli, Carlo; Hallén, Jostein (Peer reviewed; Journal article, 2020)Purpose: The endurance training (ET)-induced increases in peak oxygen uptake (V˙O2peak) and cardiac output (Q˙peak) during upright cycling are reversed to pre-ET levels after removing the training-induced increase in blood ... -
Contribution of oxygen extraction fraction to maximal oxygen uptake in healthy young men
Skattebo, Øyvind; Calbet, Jose Antonio Lopez; Rud, Bjarne; Capelli, Carlo; Hallén, Jostein (Peer reviewed; Journal article, 2020)We analysed the importance of systemic and peripheral arteriovenous O2 difference (a-vO2 difference and a-vfO2 difference, respectively) and O2 extraction fraction for maximal oxygen uptake (VO2max). Fick law of diffusion ... -
Determinants of the maximal functional reserve during repeated supramaximal exercise by humans: The roles of Nrf2/Keap1, antioxidant proteins, muscle phenotype and oxygenation
Galvan-Alvarez, Victor; Martin-Rincon, Marcos; Gallego-Selles, Angel; Martínez Canton, Miriam; HamedChaman, NaDer; Gelabert-Rebato, Miriam; Perez-Valera, Mario; García-Gonzalez, Eduardo; Santana, Alfredo; Holmberg, Hans-Christer; Boushel, Robert; Hallén, Jostein; Calbet, Jose Antonio Lopez (Peer reviewed; Journal article, 2023)When high-intensity exercise is performed until exhaustion a “functional reserve” (FR) or capacity to produce power at the same level or higher than reached at exhaustion exists at task failure, which could be related to ... -
Distinguishing left ventricular hypertrophy from hypertrophic cardiomyopathy in adolescents: A longitudinal observation study
Forså, Marianne Inngjerdingen; Smedsrud, Marit Kristine; Haugaa, Kristina Ingrid Helena Hermann; Bjerring, Anders W.; Fruh, Andreas; Sarvari, Sebastian I.; Landgraff, Hege Elisabeth Wilson; Hallén, Jostein; Edvardsen, Thor (Peer reviewed; Journal article, 2023)Aims: Echocardiographic characteristics to distinguish physiological left ventricular (LV) hypertrophy from pathology are warranted in early adolescent athletes. This study aimed to explore the phenotype, progression, and ... -
Effects of 150- And 450-mL Acute Blood Losses on Maximal Oxygen Uptake and Exercise Capacity
Skattebo, Øyvind; Johansen, Espen Spro; Capelli, Carlo; Hallén, Jostein (Peer reviewed; Journal article, 2021)Purpose: This study investigated whether maximal oxygen uptake (V˙O2max) and exercise capacity are affected by small acute blood loss (150 mL) and elucidated compensatory mechanisms. Methods: Thirteen male subjects (V˙O2max, ... -
From talented child to elite athlete: The development of cardiac morphology and function in a cohort of endurance athletes from age 12 to 18
Bjerring, Anders W.; Landgraff, Hege Wilson; Leirstein, Svein; Haugaa, Kristina; Edvardsen, Thor; Sarvari, Sebastian; Hallén, Jostein (Peer reviewed; Journal article, 2020)Background: Adult athletes undergo cardiac adaptions in what is known as the “athlete’s heart”. Cardiac adaptations in young athletes have not been described in longitudinal studies but have previously been believed to be ... -
Functional reserve and sex differences during exercise to exhaustion revealed by post-exercise ischaemia and repeated supramaximal exercise
Martin-Rincon, Marcos; Gelabert-Rebato, Miriam; Perez-Valera, Mario; Galvan-Alvarez, Victor; Morales-Alamo, David; Dorado, Cecilia; Boushel, Robert; Hallén, Jostein; Calbet, José Antonio López (Peer reviewed; Journal article, 2021)The purpose of this study was to ascertain what mechanisms explain sex differences at task failure and to determine whether males and females have a functional reserve at exhaustion. Exercise performance, cardiorespiratory ... -
Impact of baseline serum ferritin and supplemental iron on altitude-induced hemoglobin mass response in elite athletes
Koivisto-Mørk, Anu; Svendsen, Ida Siobhan; Skattebo, Øyvind; Hallén, Jostein; Paulsen, Gøran (Peer reviewed; Journal article, 2021)The present study explored the impact of pre-altitude serum (s)-ferritin and iron supplementation on changes in hemoglobin mass (ΔHbmass) following altitude training. Measures of Hbmass and s-ferritin from 107 altitude ... -
Individual variations in pre-altitude hemoglobin mass influence hemoglobin mass responses to repeated altitude sojourns
Skattebo, Øyvind; Hallén, Jostein (Peer reviewed; Journal article, 2022)Introduction: Previous studies have shown variable within-subject hemoglobin mass (Hbmass) responses to altitude training. We investigated whether Hbmass responses depend on individual variations in pre-altitude Hbmass ... -
Kinematic differences between uphill roller skiing and on-snow skiing using the V2 skating technique
Myklebust, Håvard; Losnegard, Thomas Johansen; Hallén, Jostein (Peer reviewed; Journal article, 2022)Purpose: Roller skiing is the primary sport-specific training and testing mode during pre-competition periods for cross-country skiers, biathletes, and Nordic combined athletes. The present study aimed to compare the ... -
Longitudinal changes in maximal oxygen uptake in adolescent girls and boys with different training backgrounds
Landgraff, Hege Elisabeth W.; Riiser, Amund; Lihagen, Maren; Skei, Marius; Leirstein, Svein; Hallén, Jostein (Peer reviewed; Journal article, 2021)The purpose of this study was to investigate the effects of high-volume endurance training on the development of maximal oxygen uptake (VO2max) in physically active boys and girls between the ages of 12 and 15 years, using ... -
Longitudinal Training-related Hematological Changes in Boys and Girls from Ages 12 to 15 yr
Landgraff, Hege Elisabeth W.; Hallén, Jostein (Peer reviewed; Journal article, 2020)Purpose Natural growth and maturation cause hemoglobin mass (Hbmass) and blood volume (BV) to increase during childhood and adolescence. Whether endurance training during the same period can cause further increases in these ... -
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 ... -
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 ... -
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 ...