Impact of training and hypocaloric diet on fat oxidation and body composition in obese adolescents

Objective. - We undertook to evaluate the effects of training and hypocaloric diet on fat oxidation and weight loss in obese adolescents within a two-month program. Methods. - The longitudinal intervention of a two-month program was performed in 54 adolescents, whose body mass index was 30.3 +/- 4.0 kg/m(2). They were divided into three groups: hypocaloric diet program (D), individualized training program at the level of maximal lipid oxidation Lipox(max) (T) and hypocaloric diet combined with training program (D + T). The body composition, the substrate "crossover" point and the Lipox(max) point were determined before and after each protocol. Results. - The decreases in body weight and fat mass were more significant in the D + T group (p < 0.01) than in the D (p < 0.05) or T (p = 0.07) groups. In the D + T group, the crossover point was observed at a higher intensity at the end of the program (+ 19.7% +/- 2.4 of W-max; p < 0.00 1), and the fat oxidation at Lipox(max) has increased by 83.2 +/- 15.3 mg/min (p < 0.01). A significant correlation between Lipox(max) and weight was also observed after the program in D + T subject. (C) 2008 Elsevier Masson SAS. All rights reserved.