Blar i HVL Open på forfatter "Kristoffersen, Morten"
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Accuracy of Tracking Devices’ Ability to Assess Exercise Energy Expenditure in Professional Female Soccer Players: Implications for Quantifying Energy Availability
Tutu Dasa, Marcus Småvik; Friborg, Oddgeir; Kristoffersen, Morten; Pettersen, Gunn; Sundgot-Borgen, Jorunn; Rosenvinge, Jan H (Peer reviewed; Journal article, 2022)The purpose of the study was to assess the accuracy of commonly used GPS/accelerometer-based tracking devices in the estimation of exercise energy expenditure (EEE) during high-intensity intermittent exercise. A total of ... -
Acute response in circulating microRNAs following a single bout of short-sprint and heavy strength training in well-trained cyclists
Ryningen, Anita; Rostad, Kari; Ersvær, Elisabeth; Sjøholt, Gry; Paulsen, Gøran; Gundersen, Hilde; Kristoffersen, Morten; Bjørkhaug, Lise (Peer reviewed; Journal article, 2024)Background: Heavy strength (HS) and short-sprint (SS) are commonly used training methods for competitive road cyclists, with the aim to improve the anaerobic power and short time cycling performance. Knowledge of how such ... -
Associations between biological maturity level, match locomotion, and physical capacities in youth male soccer players
Gundersen, Hilde; Riiser, Amund; Algrøy, Erling Andre; Vestbøstad, Mona; Sæterbakken, Atle Hole; Clemm, Hege Synnøve Havstad; Grendstad, Halvard; Hafstad, Arild; Kristoffersen, Morten; Rygh, Cecilie Brekke (Peer reviewed; Journal article, 2022)Introduction: Biological maturity level has shown to affect sport performance in youths. However, most previous studies have used noninvasive methods to estimate maturity level. Thus, the main aim of the present study was ... -
Comparison of Short-Sprint and Heavy Strength Training on Cycling Performance
Kristoffersen, Morten; Sandbakk, Øyvind; Rønnestad, Bent; Gundersen, Hilde (Journal article; Peer reviewed, 2019)Purpose: To compare the effects of short-sprint training (SST) and heavy-strength training (HST) following a 4-week strength-training period on sprint and endurance capacities in well-trained cyclists. Methods: Twenty-eight ... -
Effects of Including Sprints in One Weekly Low-Intensity Training Session During the Transition Period of Elite Cyclists
Almquist, Nicki Winfield; Løvlien, Ine; Byrkjedal, Per Thomas; Spencer, Matthew; Kristoffersen, Morten; Skovereng, Knut; Sandbakk, Øyvind; Rønnestad, Bent (Peer reviewed; Journal article, 2020)The purpose of this study was to investigate the effects of including 30-s sprints in one weekly low-intensity training (LIT) session during a 3-week transition period in elite cyclists. Sixteen male elite cyclists (maximal ... -
Energy expenditure, dietary intake and energy availability in female professional football players
Dasa, Marcus Småvik; Friborg, Oddgeir; Kristoffersen, Morten; Pettersen, Gunn; Plasqui, Guy; Sundgot-Borgen, Jorunn; Rosenvinge, Jan H (Peer reviewed; Journal article, 2023)Objectives: To quantify energy expenditure and intake in professional female footballers playing on a national and/or international level. Second, to determine the prevalence of low energy availability among these players, ... -
The Female Menstrual Cycles Effect on Strength and Power Parameters in High-Level Female Team Athletes
Dasa, Marcus Småvik; Kristoffersen, Morten; Ersvær, Elisabeth; Bovim, Lars Peder Vatshelle; Bjørkhaug, Lise; Moe-Nilssen, Rolf; Sagen, Jørn Vegard; Haukenes, Inger (Peer reviewed; Journal article, 2021)Purpose: The female menstrual cycle (MC) is characterized by hormonal fluctuations throughout its different phases. However, research regarding its effect on athletic performance in high level athletes is sparse. The aim ... -
Force-velocity profiling in athletes: Reliability and agreement across methods
Lindberg, Kolbjørn Andreas; Solberg, Paul Andre; Bjørnsen, Thomas; Helland, Christian; Rønnestad, Bent; Haugen, Thomas André; Østerås, Sindre; Kristoffersen, Morten; Paulsen, Gøran (Peer reviewed; Journal article, 2021)The aim of the study was to examine the test-retest reliability and agreement across methods for assessing individual force-velocity (FV) profiles of the lower limbs in athletes. Using a multicenter approach, 27 male ... -
Higher drop in speed during a repeated sprint test in soccer players reporting former hamstring strain injury
Røksund, Ola Drange; Kristoffersen, Morten; Bogen, Bård Erik; Wisnes, Alex R.; Engeseth, Merete Salveson; Nilsen, Ann-Kristin; Iversen, Vegard Vereide; Mæland, Silje; Gundersen, Hilde (Peer reviewed; Journal article, 2017) -
The inclusion of sprints in low-intensity sessions during the transition period of elite cyclists improves endurance performance 6 weeks into the subsequent preparatory period
Taylor, Madison; Almquist, Nicki Winfield; Rønnestad, Bent; Tjønna, Arnt Erik; Kristoffersen, Morten; Spencer, Matthew; Sandbakk, Øyvind; Skovereng, Knut (Peer reviewed; Journal article, 2021)Purpose: To investigate the effects of including repeated sprints in a weekly low-intensity (LIT) session during a 3-week transition period on cycling performance 6 weeks into the subsequent preparatory period (PREP) in ... -
Low cadence interval training at moderate intensity does not improve cycling performance in highly trained veteran cyclists
Kristoffersen, Morten; Gundersen, Hilde; Leirdal, Stig; Iversen, Vegard (Peer reviewed; Journal article, 2014) -
Performance in youth track and field is associated with birth quartile: A register-based study among athletes in Norway from 10 years to senior level
Gundersen, Hilde; Harris, Anette Kristoffersen; Grendstad, Halvard; Kristoffersen, Morten; Guttormsen, Atle; Dalen, Terje; Rygh, Cecilie Brekke (Peer reviewed; Journal article, 2022)Introduction Earlier studies have demonstrated that the oldest in a competition class are more likely to succeed than the youngest, a phenomenon called relative age effect (RAE). Track and field give us an opportunity to ... -
Physical capacity, not skeletal maturity, distinguishes competitive levels in male Norwegian U14 players
Grendstad, Halvard Nikolai; Nilsen, Ann-Kristin; Rygh, Cecilie Brekke; Hafstad, Arild; Kristoffersen, Morten; Iversen, Vegard Vereide; Nybakken, Tone; Vestbøstad, Mona; Algrøy, Erling Andre; Sandbakk, Øyvind; Gundersen, Hilde (Peer reviewed; Journal article, 2019)The main aim of the present study was to compare skeletal maturity level and physi-cal capacities between male Norwegian soccer players playing at elite, sub-elite and non-elite level. Secondary, we aimed to investigate ... -
Power production and biochemical markers of metabolic stress and muscle damage following a single bout of short-sprint and heavy strength exercise in well-trained cyclists
Kristoffersen, Morten; Sandbakk, Øyvind; Tønnessen, Espen; Svendsen, Ida S.; Paulsen, Gøran; Ersvær, Elisabeth; Nygård, Irene; Rostad, Kari; Ryningen, Anita; Iversen, Vegard Vereide; Skovereng, Knut; Rønnestad, Bent; Gundersen, Hilde (Journal article; Peer reviewed, 2018)Purpose: Although strength and sprint training are widely used methods in competitive cycling, no previous studies have compared the acute responses and recovery rates following such sessions among highly trained cyclists. ... -
Study protocol: Prevalence of low energy availability and its relation to health and performance among female football players.
Rosenvinge, Jan H; Dasa, Marcus Småvik; Kristoffersen, Morten; Pettersen, Gunn; Sundgot-Borgen, Jorunn; Sagen, Jørn Vegard; Friborg, Oddgeir (Peer reviewed; Journal article, 2022)Enduring low energy availability (LEA) is associated with several potentially serious physiological and mental conditions. LEA has been found highly prevalent among female elite athletes within endurance sports, thus ...