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Comparison of fat oxidation during exercise in lean and obese pubertal boys: clinical implications.
MedLine Citation:
PMID:  18385189     Owner:  NLM     Status:  In-Process    
OBJECTIVE: To examine fat oxidation rates during exercise in lean and obese pubescent children. DESIGN: A graded leg cycle ergometry test was performed by two groups of pubescent boys (13 lean: mean (SD) age 12.0 (0.5) years, body mass index (BMI) 18.56 (1.12) kg/m(2); 17 obese: mean (SD) age 12.1 (0.1) years, BMI 26.68 (3.37) kg/m(2); p<0.001). The first step of the test was fixed at 30 W and power was gradually increased by 20 W every 3.5 min. The mean ventilatory gas measurement was obtained during the last 30 s of each step for calculation of fat oxidation rate vs exercise intensity. RESULTS: At low intensity (0-30% of peak oxygen consumption) when fat-free mass is considered, the fat oxidation rate was identical for the two groups. At higher intensities (40%, 50% and 60% of peak oxygen consumption) the fat oxidation rate was significantly higher in lean boys than in obese boys. CONCLUSION: These results confirm that obese pubertal boys have fat-free mass decreased capacities to use fat during moderate exercise. The findings suggest that obese boys need to practise physical activity at a lower intensity than healthy boys to enhance lipolysis and diminish adipose tissue and the consequences of obesity.
G Zunquin; D Theunynck; B Sesboüé; P Arhan; D Bouglé
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Publication Detail:
Type:  Journal Article     Date:  2008-04-02
Journal Detail:
Title:  British journal of sports medicine     Volume:  43     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-10-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  869-70     Citation Subset:  IM    
Laboratoire REcherche Littorale en Activités Corporelles et Sportives, Dunkerque, Université du Littoral Côte d'Opale, F 59140, Dunkerque, France.
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