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Browsing NTNU Open by Author "Øvretveit, Karsten"

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    • Achievement goal profiles, and perceptions of motivational climate and physical ability in male Brazilian jiu-jitsu practitioners 

      Øvretveit, Karsten; Sæther, Stig Arve; Mehus, Ingar (Journal article; Peer reviewed, 2018)
      Background and Study Aim: Brazilian jiu-jitsu (BJJ) is a martial art with high rates of attrition. At present, little is known about the achievement goals of martial arts practitioners, particularly in BJJ. Thus, our aim ...
    • Achievement goal profiles, and perceptions of motivational climate and physical ability in male Brazilian jiu-jitsu practitioners 

      Øvretveit, Karsten; Sæther, Stig Arve; Mehus, Ingar (Journal article; Peer reviewed, 2018)
      Background and Study Aim: Brazilian jiu-jitsu (BJJ) is a martial art with high rates of attrition. At present, little is known about the achievement goals of martial arts practitioners, particularly in BJJ. Thus, our aim ...
    • Acute physiological and perceptual responses to Brazilian jiu-jitsu sparring: the role of maximal oxygen uptake 

      Øvretveit, Karsten (Journal article; Peer reviewed, 2018)
      Sparring is a training form in combat sports designed to simulate fighting. This study sought to assess physiological and perceptual responses to Brazilian jiu-jitsu (BJJ) sparring and their relationship with maximal oxygen ...
    • Aerobic interval training improves maximal oxygen uptake and reduces body fat in grapplers 

      Øvretveit, Karsten (Journal article; Peer reviewed, 2019)
      BACKGROUND: Despite regularly engaging in high-intensity grappling, Brazilian jiu-jitsu (BJJ) athletes have a moderate maximal oxygen uptake (V̇O2max). The aim of this study was to evaluate the efficacy and feasibility of ...
    • Anthropometric and Physiological Characteristics of Brazilian Jiu-Jitsu Athletes 

      Øvretveit, Karsten (Journal article; Peer reviewed, 2018)
      Øvretveit, K. Anthropometric and physiological characteristics of Brazilian jiu-jitsu athletes. J Strength Cond Res 32(4): 997–1004, 2018—The aim of this study was to describe anthropometric and physiological characteristics ...
    • Anthropometric, physiological, and psychological characteristics of Brazilian jiu-jitsu athletes - A cross-sectional study 

      Øvretveit, Karsten (Master thesis, 2018)
      Brazilian jiu-jitsu (BJJ) is a modern martial art with roots in Japan and Brazil. Despite growing popularity, there is a paucity of studies on the sport and its athletes. Thus, the aim of this study was to determine ...
    • Capacity and confidence: What can be gleaned from the link between perceived and actual physical ability in Brazilian jiu-jitsu practitioners? 

      Øvretveit, Karsten (Peer reviewed; Journal article, 2020)
      Among the many modern iterations of grappling-based combat sports, Brazilian jiu-jitsu (BJJ) has emerged as one of the most popular. In addition to its well-established effectiveness in competition, it is considered to be ...
    • Mastery goals are associated with training effort in Brazilian jiu-jitsu 

      Øvretveit, Karsten; Sæther, Stig Arve; Mehus, Ingar (Journal article; Peer reviewed, 2019)
      Problem statement: Brazilian jiu-jitsu (BJJ) is a grappling-based combat sport with a high attrition rate. Central to BJJ training is simulated competition in the form of sparring, which may have implications for athlete ...
    • Maximal strength training improves strength performance in grapplers 

      Øvretveit, Karsten; Tøien, Tiril (Journal article; Peer reviewed, 2018)
      The aim of this study was to assess the short-term effects of maximal strength training (MST) as an accessory to grappling training on strength performance in competitive Brazilian Jiu-Jitsu (BJJ) athletes. Fourteen male ...
    • Post-Exercise Hypotension in Brazilian Jiu-Jitsu 

      Belo, Wesley Rodrigues; de Castro, Lucas Fenta; Palmieri, Diego Cesar; dos Santos, Luiz Gustavo Dias; Herrera-Valenzuela, Tomás; dos Santos, Marco Antonio Ferreira; Øvretveit, Karsten; Simão, Roberto (Peer reviewed; Journal article, 2020)
      Hypertension is a leading preventable cause of morbidity and mortality worldwide. Exercise is a widely recommended treatment strategy that has been shown to cause both acute and chronic reductions in blood pressure. This ...

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