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Blar i NTNU Open på forfatter "Tjønna, Arnt Erik"

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Viser treff 1-18 av 18

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    • Aerobic Exercise and Cardiovascular Risk Factors in Overweight and Obese Adolescents and Adults 

      Tjønna, Arnt Erik (Doktoravhandlinger ved NTNU, 1503-8181; 2008:234, Doctoral thesis, 2008)
      Kondisjonstrening og kardiovaskulære risikofaktorer blant overvektige og fete ungdommer og voksne Kondisjonstrening er vist å bedre hjerte- og blodårefunksjon hos pasienter med etablert hjerte- og karsykdom, blant de med ...
    • Cardiorespiratory fitness and sedentary time in subjects with the metabolic syndrome: A randomized controlled trial 

      Birkeland, Vegard (Master thesis, 2014)
      Metabolic syndrome (MetS) is an increasing health concern worldwide. Low cardiorespiratory fitness (CRF) and high amount of sedentary behaviors are strongly associated with the MetS and cardiovascular disease (CVD). Aerobic ...
    • Children´s physical activity level in association with cardiorespiratory fitness and health: The Future Kids In Daily activity (FutureKID) cross-sectional pilot study. 

      Brodal, Lisa Busklein (Master thesis, 2019)
      Bakgrunn: Overvekt og fedme blant barn og ungdom er et globalt problem. Flere studier har undersøkt problematikken, og rettet fokuset sitt mot blant annet fysisk aktivitet (FA), kardiorespiratorisk form (VO2peak) og helse ...
    • Comparison of Mitochondrial Respiration in M. triceps brachii and M. vastus lateralis Between Elite Cross-Country Skiers and Physically Active Controls 

      Berg, Jonathan; Undebakke, Vidar; Rasch-Halvorsen, Øystein; Aakerøy, Lars; Sandbakk, Øyvind; Tjønna, Arnt Erik (Journal article; Peer reviewed, 2019)
      Rationale: The main purposes of this study were to compare mitochondrial respiration in M. triceps brachii and M. vastus lateralis between elite cross-country (XC) skiers and physically active controls (CON), and to explore ...
    • Comparison of Physiological and Perceptual Responses to Upper-, Lower-, and Whole-Body Exercise in Elite Cross-Country Skiers 

      Undebakke, Vidar; Berg, Jonathan; Tjønna, Arnt Erik; Sandbakk, Øyvind (Journal article; Peer reviewed, 2019)
      Undebakke, V, Berg, J, Tjønna, AE, and Sandbakk, Ø. Comparison of physiological and perceptual responses to upper-, lower-, and whole-body exercise in elite cross-country skiers. J Strength Cond Res 33(4): 1086–1094, ...
    • Effect of 24 sessions of high-intensity aerobic interval training carried out at either high or moderate frequency, a randomized trial 

      Hatle, Håvard; Støbakk, Per Kristian; Hansen, Harald Edvard Mølmen; Brønstad, Eivind; Tjønna, Arnt Erik; Steinshamn, Sigurd Loe; Skogvoll, Eirik; Wisløff, Ulrik; Ingul, Charlotte Bjørk; Rognmo, Øivind (Journal article; Peer reviewed, 2014)
      Purpose: The training response of an intensified period of high-intensity exercise is not clear. Therefore, we compared the cardiovascular adaptations of completing 24 high-intensity aerobic interval training sessions ...
    • Effect of Aerobic Interval Training Before Gastric Bypass Surgery on Length Of Hospital Stay and Complications. 

      Haaland, Iselin (Master thesis, 2016)
      Obesity predisposes an individual to develop numerous comorbidities, including type 2 diabetes, and represents a major healthcare issue in many countries worldwide. Bariatric surgery can be an effective treatment option, ...
    • Effects of exercise intensity and nutrition advice on myocardial function in obese children and adolescents: a multicentre randomised controlled trial study protocol. 

      Dias, Katrin A.; Coombes, Jeff S; Green, DJ; Gomersall, SR; Keating, SE; Tjønna, Arnt Erik; Hollekim-Strand, Siri Marte; Hosseini, Mansoureh Sadat; Rø, Torstein Baade; Haram, M; Huuse, EM; Davies, PS; Cain, PA; Leong, GM; Ingul, Charlotte Bjørk (Journal article; Peer reviewed, 2016)
      Introduction The prevalence of paediatric obesity is increasing, and with it, lifestyle-related diseases in children and adolescents. High-intensity interval training (HIIT) has recently been explored as an alternate to ...
    • Effects of High-Intensity Interval Training After Stroke (the HIIT-Stroke Study): A Multicenter Randomized Controlled Trial 

      Gjellesvik, Tor Ivar; Becker, Frank; Tjønna, Arnt Erik; Indredavik, Bent; Nilsen, Halvard Knut; Brurok, Berit; Tørhaug, Tom; Busuladzic, Maja; Lydersen, Stian; Askim, Torunn (Peer reviewed; Journal article, 2020)
      Objective To examine if 8 weeks of high-intensity interval training (HIIT) in addition to standard care would increase and maintain peak oxygen uptake (Vo2peak) more than standard care alone in patients with stroke. ...
    • Effekten av kortvarig styrketrening på metabolsk helse og kroppssammensetning: En randomisert kontrollert pilotstudie 

      Riksfjord, Sondre (Master thesis, 2019)
      Bakgrunn: Overvekt, fedme og inaktivitet er et økende problem globalt, og er årsaker til millioner av dødsfall hvert år i tillegg til en enorm global kostnad. Muskelmasse har vist seg å ha en negativ korrelasjon med generell ...
    • Evidence against a Beneficial Effect of Irisin in Humans 

      Raschke, Silja; Elsen, Manuela; Gassenhuber, Hans; Sommerfeld, Mark; Schwahn, Uwe; Brockmann, Barbara; Jung, Raphael; Wisløff, Ulrik; Tjønna, Arnt Erik; Raastad, Truls; Hallén, Jostein; Norheim, Frode; Drevon, Christian A; Romacho, Tania; Eckardt, Kristin; Eckel, Juergen (Journal article; Peer reviewed, 2013)
      Brown adipose tissue has gained interest as a potential target to treat obesity and metabolic diseases. Irisin is a newly identified hormone secreted from skeletal muscle enhancing browning of white fat cells, which ...
    • EX-MET study: Exercise in prevention on of metabolic syndrome - A randomized multicenter trial: Rational and design 

      Tjønna, Arnt Erik; Ramos, Joyce S.; Pressler, Axel; Halle, Martin; Jungbluth, Klaus; Ermacora, Erika; Salvesen, Øyvind; Rodrigues, Jhennyfer; Bueno, Carlos Roberto; Munk, Peter Scott; Coombes, Jeff; Wisløff, Ulrik (Journal article; Peer reviewed, 2018)
      Background Metabolic syndrome substantially increases risk of cardiovascular events. It is therefore imperative to develop or optimize ways to prevent or attenuate this condition. Exercise training has been long recognized ...
    • High-intensity interval training improves obstructive sleep apnoea 

      Karlsen, Trine; Nes, Bjarne; Tjønna, Arnt Erik; Engstrøm, Morten; Støylen, Asbjørn; Steinshamn, Sigurd Loe (Journal article; Peer reviewed, 2017)
      Background Three hours per week of vigorous physical activity is found to be associated with reduced odds of sleep-disordered breathing. Aim To investigate whether 12 weeks of high-intensity interval training (HIIT) ...
    • Implications of Peak Oxygen Consumption and Visceral Adipose Tissue on the Metabolic Syndrome: A matter of intensity, duration and frequency?: A Randomized Controlled Trial 

      Fremo, Thomas (Master thesis, 2014)
      The metabolic syndrome (MetS) is a socioeconomic concern on a worldwide scale. Visceral adipose tissue (VAT) accumulation is a fundamental component of the MetS, and the prevalence of abdominally obese individuals steadily ...
    • Low- and High-Volume of Intensive Endurance Training Significantly Improves Maximal Oxygen Uptake after 10-Weeks of Training in Healthy Men 

      Tjønna, Arnt Erik; Leinan, Ingeborg; Jenssen, Bjørn Munro; Gibala, Martin; Winett, Richard A.; Wisløff, Ulrik; Bartnes, Anette Thoresen (Journal article; Peer reviewed, 2013)
      Regular exercise training improves maximal oxygen uptake (VO2max), but the optimal intensity and volume necessary to obtain maximal benefit remains to be defined. A growing body of evidence suggests that exercise training ...
    • Oxygen uptake during functional activities after stroke - Reliability and validity of a portable ergospirometry system 

      Gjellesvik, Tor Ivar; Brurok, Berit; Tjønna, Arnt Erik; Tørhaug, Tom; Askim, Torunn (Journal article; Peer reviewed, 2017)
      Background People with stroke have a low peak aerobic capacity and experience increased effort during performance of daily activities. The purpose of this study was to examine test-retest reliability of a portable ...
    • Relation Between Rural and Urban Schools in Regards to Physical Education Participation, Daily Physical Activity and Cardiorespiratory Fitness - A Cross-Sectional Pilot Study of Norwegian School Children 

      Rosvold, Guro (Master thesis, 2019)
      Bakgrunn: En nedgang i fysisk aktivitetsnivå er blitt sett i overgangen fra barn til ungdom. Selv om andelen skolebaserte intervensjoner for å bekjempe nedgangen i fysisk aktivitet (FA) øker, viser rapporter ingen økning ...
    • The effects of systematic block versus traditional periodization on physiological and performance indicators of well-trained cyclists 

      Ing, Steven (Master thesis, 2019)
      Abstract Previous studies have found block periodization to be an effective training organization model for improving endurance performance indicators as well as related physiological capacities in endurance athletes. ...

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