• 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 (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-14)
      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 13 female soccer players competing at the highest level in Norway (age 20.5 ± 4.3 years; height 168.4 ± 5.1 cm; weight 64.1 ± 5.3 kg; fat free mass 49.7 ± 4.2 kg) completed a single ...
    • Det gjensidige samspill mellom lærer og film. En film kan ikke stå på egne ben 

      Kristoffersen, Morten (Master thesis; Mastergradsoppgave, 2015-05-15)
      Denne undersøkelsen tar utgangspunkt i ”Hvordan øke læringsutbyttet ved mer bevisst pedagogisk bruk av film som læringsressurs i samfunnsfagundervisningen?”. Dette spørsmålet ble forsøkt svart med tre utdypende spørsmål om filmsjanger, didaktiske valg med film som læringsressurs, og om noen disipliner i samfunnsfag er bedre tjent med film enn andre. Oppgaven baserer seg på teori fra flere forfattere ...
    • 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 (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-11)
      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 oxygen uptake, VO<sub>2max</sub>: 72 ± 5 ml·kg<sup>−1</sup>·min<sup>−1</sup>) reduced their training load by ~60% for 3 weeks from the end of competitive season and performed ...
    • 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 (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-24)
      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, defined as <30 kcal/kg fat-free mass (FFM)/day. Methods: Fifty-one players completed a 14-day prospective observational study during the 2021/2022 football season. Energy ...
    • Evaluating the suitability of the Low Energy Availability in Females Questionnaire (LEAF-Q) for female footballers 

      Dasa, Marcus Småvik; Friborg, Oddgeir; Kristoffersen, Morten; Pettersen, Gunn; Sagen, Jørn Vegard; Sundgot-Borgen, Jorunn; Rosenvinge, Jan H (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-13)
      Background - The Low Energy Availability in Females Questionnaire (LEAF-Q) is a screening tool developed to detect endurance athletes and dancers at risk for development of persistent low energy availability (LEA) and the female athlete triad (Triad). This study investigated the applicability of the LEAF-Q in a cohort of sixty professional female football players.<p> <p>Methods - The participants ...
    • 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 (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-10)
      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 hampering athletes’ health and performance. The prevalence and the underpinning risk factors of LEA among female elite football players are less studied. One reason is that the existing ...