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Effects of an eight-month weight-control program on body composition and lipid oxidation rate during exercise in obese children

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Abstract

Objective: To investigate the effects of an 8-month multidisciplinary weight-control program, including 2 h/week of moderate physical activity, nutritional education lessons and psychological follow-up, on body composition and lipid oxidation rate during exercise in obese children. Design: Nineteen (7 boys and 12 girls) obese children, aged 8–12 yr [mean body mass index (BMI) z-score: 2.3 and fat mass: 35.8%] participated in this study. Before and at the end of the weight-control period body composition was assessed by bioelectrical impedance, lipid oxidation rate by indirect calorimetry during a graded exercise test, and time devoted to various activities and energy intake in free-living conditions by questionnaire. Results: All children completed the study, at the end of which BMI decreased significantly by mean 0.6±0.5 and 0.5±0.8 kg/m2, in boys and girls, respectively (p<0.05), and fat mass (FM) decreased by 1.7±2.8 and 1.4±1.3 kg in boys and girls, respectively (p<0.05). In addition, lipid oxidation rate during exercise increased significantly throughout the graded exercise test up to 21% at maximal lipid oxidation rate which happened at 48±5% of maximal oxygen uptake (VO2max), corresponding to 64±5% of maximal heart rate. Time spent at sedentary and very light physical activities decreased (p<0.001) to the benefit of recreational activities at home. Conclusions: Multi-disciplinary weight-control program, with moderate-intensity physical activities, induced decreases in FM without decreases in free FM, increases in VO2max, lipid oxidation rate during exercise, and time devoted to recreational activities in free-living conditions.

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Authors and Affiliations

  1. Department of Biomedical Sciences and Technologies, University of Udine, P.le Kolbe 4, 33100, Udine, Italy

    S. Lazzer, M. Molin & M. P. Francescato

  2. Divisione di Auxologia, Istituto Italiano di Auxologia, IRCCS, Verbania

    S. Lazzer

  3. Department of Paediatrics, Ospedale Santa Maria degli Angeli, Pordenone, Italy

    D. Stramare & S. Facchini

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  1. S. Lazzer
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Correspondence to S. Lazzer.

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Lazzer, S., Molin, M., Stramare, D. et al. Effects of an eight-month weight-control program on body composition and lipid oxidation rate during exercise in obese children. J Endocrinol Invest 31, 509–514 (2008). https://doi.org/10.1007/BF03346399

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