title: Lean adolescents achieve higher intensities but not higher energy expenditure while playing active video games compared with obese ones.
abstract: BACKGROUND
  While decreased physical activity and increased sedentary behaviours are incriminated for their role in the progression of obesity, active video games (AVG) may offer a new alternative to increase energy expenditure in youth. This study is the first to examine the effect of a 1-h AVG play on lean and obese adolescents' energy expenditure.
  
  
  METHODS
  Body composition and aerobic fitness were assessed in 19 obese and 12 lean adolescent boys (12-15 years old). Participants performed a 1-h AVG session (Kinect Sports technology) while wearing a portable indirect calorimeter (K4b2) to assess their energy expenditure and heart rate.
  
  
  RESULTS
  Body weight (91.0 ± 9.5 vs. 58.5 ± 12.4 kg), body mass index (32.2 ± 3.1 vs. 20.3 ± 1.6 kg m(-2) ) and body fat (38.1 ± 2.7 vs. 13.4 ± 3.9%) were significantly higher in obese adolescents (P < 0.001). Absolute energy expenditure was significantly higher in obese (P < 0.05) but not when corrected for body composition. Maximal heart rate reached during AVG was significantly higher in lean adolescents (190 ± 25 vs. 183 ± 28 bpm, P < 0.05). Time spent between 3 and 6 METs (Metabolic Equivalent Task) was not different between groups but time spent above 6 METs was higher in lean adolescents (P < 0.05).
  
  
  CONCLUSIONS
  Although lean and obese adolescent boys experienced similar energy expenditure relative to their body size during a 1-h Kinect AVG session, lean adolescents spent more time in moderate-to-vigorous physical activity.
authors: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.|School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada.
authors: J P
authors: JP
authors: Chaput
authors: Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), Clermont University, Blaise Pascal University, Clermont-Ferrand, France.
authors: P M
authors: PM
authors: Genin
authors: Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), Clermont University, Blaise Pascal University, Clermont-Ferrand, France.
authors: B
authors: B
authors: Le Moel
authors: Biostatistics Unit (DRCI), Clermont-Ferrand University Hospital, Clermont-Ferrand, France.
authors: B
authors: B
authors: Pereira
authors: Department of Human Nutriton, G. Montpied Hospital, Clermont-Ferrand University Hospital, Clermont-Ferrand, France.|UMR 1019, INRA, Clermont-Ferrand, France.|UFR Medicine, University Clermont 1, Clermont-Ferrand, France.|CRNH-Auvergne, Clermont-Ferrand, France.
authors: Y
authors: Y
authors: Boirie
authors: UMR 1019, INRA, Clermont-Ferrand, France.|UFR Medicine, University Clermont 1, Clermont-Ferrand, France.|CRNH-Auvergne, Clermont-Ferrand, France.|Department of Sport Medicine and Functional Explorations, G. Montpied Hospital, Clermont-Ferrand University Hospital, Clermont-Ferrand, France.
authors: M
authors: M
authors: Duclos
authors: Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), Clermont University, Blaise Pascal University, Clermont-Ferrand, France.|CRNH-Auvergne, Clermont-Ferrand, France.
authors: D
authors: D
authors: Thivel
mesh_terms: D000293:Adolescent; D001823:Body Composition; D001835:Body Weight; D002153:Calorimetry, Indirect; D004734:Energy Metabolism / Q000502:physiology; D005260:Female; D005602:France; D006339:Heart Rate; D006801:Humans; D008297:Male; D063766:Pediatric Obesity / Q000378:metabolism* / Q000503:physiopathology; D010809:Physical Fitness / Q000502:physiology; D013851:Thinness / Q000378:metabolism* / Q000503:physiopathology; D018910:Video Games
keywords: Active video game; adolescents; energy expenditure; exercise intensity; paediatric obesity