Effects of supervised exercise program on metabolic function in overweight adolescents
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Effects of supervised exercise program on metabolic function in overweight adolescents Marco Meucci, Carol Cook, Chelsea Diane Curry, Laura Guidetti, Carlo Baldari, Scott Robert Collier Boone, NC, USA
Methods: Twenty-two adolescents were divided into 4-week (n=6, weight 48.1±14.9 kg, body fat 27.4±8.4%) and 8-week exercise groups (n=6, weight 43.4±10.9 kg, body fat 28.5±12.8%), that performed supervised, play-based physical activity, versus an age-matched 8 week control group that maintained their typical summer break (n=10, weight 41.7±10.0 kg, body fat 23.7±8.0%). Anthropometrics, resting energy expenditure (REE), resting heart rate (RHR) and peak aerobic capacity (VO 2peak) were evaluated before and after the intervention (4 or 8 weeks). Results: REE showed group differences in posttraining conditions (the 4-week group vs. the control group, 1220±169 vs. 1067±144 kcal/die, and the 8-week group vs. the control group, 1202±151 vs. 1067±144 kcal/ die, P=0.047), but RHR decreased (pre-program vs. post program: 97±22 vs. 80±8 beat/min, P=0.001) and VO2peak significantly increased (pre-program vs. post program: 27.8±7.8 vs. 34.8±6.5 mL/kg/min, P=0.001) in the 8-week group compared to the control group. Conclusions: Eight weeks of supervised play-based activity increased REE and VO2peak in adolescents with concomitant decreases in RHR. These data suggest
Author Affiliations: Health Science Department, University of Rome "Foro Italico" (Meucci M, Guidetti L, Baldari C); Health Leisure and Exercise Science Department, Appalachian State University, Boone, NC, USA (Cook C, Collier SR, Curry CD) Corresponding Author: Scott Robert Collier, 111 Rivers Street, 051 Holmes Convocation Center, Boone, NC 28608-2071, ASU Box 32071, USA (Tel: 828-262-7145; Email: [email protected]) doi: 10.1007/s12519-013-0440-2 ©Children's Hospital, Zhejiang University School of Medicine, China and Springer-Verlag Berlin Heidelberg 2013. All rights reserved.
that this novel model of exercise prescription could be considered world-wide by clinicians to improve fitness base in adolescents and help to combat the growing epidemic of childhood obesity. World J Pediatr 2013;9(4):307-311 Key words: cardiorespiratory fitness; functional physiology; overweight adolescents; supervised exercise
Introduction
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n the United States alone, childhood obesity has more than tripled over the past 30 years. The prevalence of obesity has increased in children and adolescents by 3.1% and 13.1% respectively from 1980 to 2008.[1] A sedentary lifestyle shows a positive correlation with adolescents becoming overweight and obese, which is partially attributable to increased screen time, for television, video games and recreational computer use. [2-5] Recently, it has been shown that adolescent screen time increases when children are away from school. [6] Decreasing the volume and duration of physical activity, especially since summer break may lead to less structured days in children who tend to be less active and increase body weight.[7,8] It is well known that a
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