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  • Absentee rates in physical education in high schools: The importance of gender and study programmes 

    Lagestad, Pål Arild; Welde, Boye; Rånes, Vebjørn; Myhre, Hege (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-02)
    Little is known about absenteeism in high school physical education (PE) in relation to study programme and gender. This study investigated the impact of gender and study programme on absentee rates in PE by analyzing data, using non-parametric statistical analyses, from the absentee registers for all 6928 students in Nordland Country. The results showed that the absentee rates in PE differed among ...
  • Accelerations and high intensity running in field and assistant football referees during match play 

    Riiser, Amund; Pettersen, Svein Arne; Andersen, Vidar; Sæterbakken, Atle Hole; Frøyd, Christian; Ylvisåker, Einar; Moe, Vegard Fusche (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-20)
    <p><i>Objectives</i>: (1) to examine accelerations and high intensity running (HIR) in football field referees (FR) and assistant referees (AR) during football matches and (2) to evaluate fluctuations in accelerations and HIR between first and second half and in 5-min periods.</p> <p><i>Methods</i>: All movements of the referees were measured using a radio-based tracking system during 41 matches ...
  • Influence of different soccer-specific maximal actions on physiological, perceptual and accelerometer measurement loads 

    Dalen, Terje; Øverås, Ørjan; van den Tillaar, Roland; Welde, Boye; von Heimburg, Erna Dianne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-13)
    <p><i>Background</i>: The aim of this study was to compare the effect of different soccer-specific maximal actions (Continuous run, Sprint, Sprint with change of direction [Sprint COD], Jump and Shot) upon physiological (oxygen uptake and heart rate) and perceptual (rating of perceived exertion [RPE]) responses and accelerometer load.</p> <p><i>Materials and methods</i>: Ten moderately to ...
  • Position specific player load during match-play in a professional football club 

    Baptista, Ivan; Johansen, Dag; Seabra, André; Pettersen, Svein Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-24)
    There is a rapid growing body of knowledge regarding physical aspects of a football match due to studies using computer-assisted motion analysis. The present study used time-motion analysis and triaxial-accelerometers to obtain new insights about differences in physical profiles of elite football players across playing-positions. Player performance data in 23 official home matches from a professional ...
  • Learning leadership: becoming an outdoor leader 

    Enoksen, Elisabeth; Lynch, Pip (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-19)
    Recent leadership research has demonstrated a need for better understanding the process of becoming a leader because it might be qualitatively different to being a leader. If so, there is likely to be a need for pedagogies designed deliberately to support first-time outdoor leadership experiences and any such pedagogies must be informed by the needs of first-time leaders. Becoming a leader in outdoor ...
  • Chronotype, Physical Activity, and Sport Performance: A Systematic Review 

    Vitale, Jacopo Antonino; Weydahl, Andi (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-11)
    Background:<br> Many variables related to sport have been shown to have circadian rhythms. Chronotype is the expression of circadian rhythmicity in an individual, and three categories of chronotype are defined: morning types (M-types), evening types (E-types), and neither types (N-types). M-types show earlier peaks of several psychophysiological variables during the day than E-types. The effect ...
  • Evening melatonin in January after changes in hours of habitual exercise during fall among youths living in the subarctic. 

    Weydahl, Andi (Journal article; Tidsskriftartikkel; Peer reviewed, 1994)
    Secretion of the hormone melatonin shows a circadian rhythm and is inhibited by light. Light therapy with phase shifting of the melatonin rhythm has been used as treatment of sleeping problems and seasonal affective disorders (SAD). Exercise has also been shown to suppress the melatonin secretion. In order to investigate the effect of increased level of habitual physical activity upon ...
  • The Responses of Elite Athletes to Exercise: An All-Day, 24-h Integrative View Is Required! 

    Sperlich, Billy; Holmberg, Hans-Christer (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-14)
    The current research topics in Frontiers of Physiology include “Training intensity, volume and recovery distribution among elite and recreational endura nce athletes” (Frontiers in Physiology, 2016) and “Wearable Sensor Technology for Monitoring Training Load and Health in the Athletic Population” (Frontiers in Physiology, 2017). As editors of both of these topics, we would like to share some ...
  • Instant Biofeedback Provided by Wearable Sensor Technology Can Help to Optimize Exercise and Prevent Injury and Overuse 

    Düking, Peter; Holmberg, Hans-Christer; Sperlich, Billy (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-03)
    With great interest, we have been following the developing variety and popularity of commercially available wearable sensor technologies, as well as the discussion concerning their usefulness for improving fitness and health (Duking et al., 2016; Halson et al., 2016; Sperlich and Holmberg,2016). Although many of these devices may not necessarily fulfill scientific criteria for quality (Sperlich and ...
  • A SWOT Analysis of the Use and Potential Misuse of Implantable Monitoring Devices by Athletes 

    Sperlich, Billy; Düking, Peter; Holmberg, Hans-Christer (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-05)
    We have been following the developments and popularity of commercially available wearable sensor technology, as well as the ongoing discussion concerning its usefulness for improving the fitness and health of athletes (Düking et al., 2016, 2017; Sperlich and Holmberg, 2017) with considerable interest. Here, we would like to draw attention to a new generation of implantable devices (implantables) ...
  • Functional High-Intensity Circuit Training Improves Body Composition, Peak Oxygen Uptake, Strength, and Alters Certain Dimensions of Quality of Life in Overweight Women 

    Sperlich, Billy; Wallmann-Sperlich, Birgit; Zinner, Christoph; Von Stauffenberg, Valerie; Losert, Heidrun; Holmberg, Hans-Christer (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-03)
    The effects of circuit-like functional high-intensity training (Circuit<sub>HIIT</sub>) alone or in combination with high-volume low-intensity exercise (Circuit<sub>combined</sub>) on selected cardio-respiratory and metabolic parameters, body composition, functional strength and the quality of life of overweight women were compared. In this single-center, two-armed randomized, controlled study, ...
  • Den norske idrettsmodellen - i utakt med tiden? 

    Rafoss, Kolbjørn; Tangen, Jan Ove (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
    I artikkelen drøftes spørsmålet om den norske idrettsmodellen er i utakt med tiden. Vi svarer ja på spørsmålet. Dette skyldes en utdatert måte å tenke idrett og politikk på. Det foreligger en kulturell fortelling – den norske idrettsmodellen – som hindrer innsikt i og forståelse for nye trender og endringer i befolkningens fysiske og idrettslige utfoldelse. Idrettsmodellen tar utgangspunkt i at ...
  • The pacing strategy and technique of male cross-country skiers With different levels of performance during a 15-km classical race 

    Welde, Boye; Stöggl, Thomas; Mathisen, Gunnar; Supej, Matej; Zoppirolli, Chiara; Winther, Andreas Kjæreng; Pellegrini, Barbara; Holmberg, Hans-Christer (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-08)
    In this study the pacing strategy, cycle characteristics and choice of technique of elite male cross-country (XC) skiers during a three-lap, 15-km classical race with interval start were measured. During the Norwegian Championships in 2016, fast (n = 18, age: 26±4 yr; height: 182±4 cm; body mass: 78±3 kg (means±SD)) and slow skiers (n = 18, age: 22±2 yr; height: 183±5 cm; body mass: 78±6 kg) were ...
  • Chronotype and response to training during the polar night: a pilot study 

    Vitale, Jacopo Antonino; Bjørkesett, Eva; Campana, Andrea; Panizza, Giacomo; Weydahl, Andi (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-19)
    Background:<br> An individual’s chronotype influences his or her physiological rhythms. Some studies have looked at the effect of time of day on the responses to exercise, but studies on the effect of long-term training are lacking. <br>Objective:<br> To report the effects of an 8-week training period during the polar night in non- athletes of different chronotypes living at 70°N. <br>Design:<br> ...
  • Health challenges in long-distance dog sled racing: A systematic review of literature 

    Calogiuri, Giovanna; Weydahl, Andi (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-02)
    Long-distance dog sled races, e.g. Iditarod (Alaska) and Finnmarksløpet (Northern Norway), are extremely demanding sporting events that might expose mushers, handlers and a large number of organisers and volunteers to risks for their health. The purpose of this systematic literature review (PROSPERO registration n. CRD42017069136) was to identify and summarise all available scientific literature ...
  • TRAINING EFFCT DURING THE MIDNIGHTSUN PERIOD IN DIFFERENT CHRONOTYPES 

    Weydahl, Andi (Conference object; Konferansebidrag, 2017)
    Our research takes place at 70oN. Where the sun is above the horizon for 8 weeks during summer, midnight sun and below the horizon for 8 weeks during winter, polar night. Earlier we found that adults with different chronotypes responded differently to exercise performed in day-light or darkness1. During the polar night evening (E) and neither (N) -types respond to training better than morning (M) ...
  • A comparison between two different conditions of breaking up sedentary behaviour on glucose metabolism 

    Sagelv, Edvard Hamnvik; Ekelund, Ulf; Stensrud, Trine (Conference object; Konferansebidrag, 2016-05-30)
    Conclusion: There is no effect of either breaking up sedentary behaviour each hour or performing 30 minutes of vigorous physical activity in one bout compared with prolonged sitting for six hours on glucose metabolism.
  • Effects of upper-body sprint-interval training on strength and endurance capacities in female cross-country skiers 

    Vandbakk, Kristine; Welde, Boye; Hovstein, Andrea; Baumgart, Julia Kathrin; Ettema, Gertjan; Karlsen, Trine; Sandbakk, Øyvind (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-27)
    Thermal conductivity and thermal diffusivity of ionic liquids (ILs) are investigated in this work. A hot disk method for ILs thermal conductivity and thermal diffusivity measurement is utilized. Firstly, the thermal conductivity of water is measured to check the reliability of the hot disk method. In addition, the thermal conductivity of pure ILs, including BmimBF<sub>4</sub>, BmimPF<sub>6</sub>, ...
  • Kicking velocity and effect on match performance when using a smaller, lighter ball in women's football 

    Andersen, Thomas Bull; Krustrup, Peter; Bendiksen, Mads; Ørntoft, Christina; Randers, Morten B.; Pettersen, Svein Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-23)
    The present study evaluated the effect of a smaller, lighter ball on kicking speed and technical- tactical and physical match performance in high-level adult female footballers. In the laboratory test setting, the peak ball velocity was 6 % higher with the new ball (NB) than the standard ball (SB) (26.5 ± 0.5 vs. 25.1 ± 0.5 m · s − 1, p < 0.05). However, during match-play, no differences ...
  • Motor competence and implications in primary school 

    Mathisen, Gunnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-25)
    The level of motor competence for six-year-old children are of special interest because at this age they have started at school, and they have to master new requirements. Ninety-four children were tested in fine- and gross- motor skills, by the Movement ABC test. Within the fifth percentile of the USA norms, 9.6 % of the children would have to be classified as to have motor problems, with 11.7% ...

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