| Effects of low- and high-intensity exercise training on body composition and substrate metabolism in obese adolescents. | |
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MedLine Citation:
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PMID: 20808072 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The objective was to investigate the effects of a 3- week weight-management program including moderate energy restriction and exercise training at 2 intensities [low intensity (LI): 40% and high intensity (HI): 70% maximal oxygen uptake (V'O2max)] on body composition, energy expenditure, and fat oxidation rate in severely obese adolescents. Twenty obese adolescents, aged 15-17 yr (body mass index: 37.5 kg/m2; 38.2% fat mass) participated in this study. Before starting (week 0, W0) and at the end of the weight-management period (week 3,W3), body composition was assessed by a multifrequency tetrapolar impedancemeter; basal metabolic rate (BMR), energy expenditure, and substrate oxidation rate during exercise and post-exercise recovery by indirect calorimetry. At W3, body mass and fat mass decreased significantly (p<0.005) in all groups, and the decreases were significantly greater in the LI than in the HI group (-8.1±1.6 vs -5.9±1.6 kg and -4.2±1.9 vs -2.3±1.7 kg, p<0.05, respectively). Predicted V'O2max, expressed in relative values, changed significantly only in the HI group by +0.010±0.006 l/(kg fat-free mass × min) (p=0.010). By contrast, no significant changes were observed at W3 in BMR, energy expenditure, and substrate oxidation rate during exercise and post-exercise recovery. In conclusion, LI (40% of V'O2max) physical activity favors fat oxidation and it seems advisable to encourage obese adolescents to perform LI physical activity which is more feasible and acceptable than intense exercise. |
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Authors:
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S Lazzer; C Lafortuna; C Busti; R Galli; F Agosti; A Sartorio |
Publication Detail:
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Type: Journal Article Date: 2010-08-31 |
Journal Detail:
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Title: Journal of endocrinological investigation Volume: 34 ISSN: 1720-8386 ISO Abbreviation: J. Endocrinol. Invest. Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-03-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7806594 Medline TA: J Endocrinol Invest Country: Italy |
Other Details:
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Languages: eng Pagination: 45-52 Citation Subset: IM |
Affiliation:
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Istituto Auxologico Italiano, IRCCS, Laboratorio Sperimentale di Ricerche Auxo-Endocrinologiche, Via Ariosto, 13 - 20145 Milan, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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