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

ObjectiveWe undertook to evaluate the effects of training and hypocaloric diet on fat oxidation and weight loss in obese adolescents within a two-month program.MethodsThe longitudinal intervention of a two-month program was performed in 54 adolescents, whose body mass index was 30.3 ± 4.0 kg/m². 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.ResultsThe 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 < 0.001), 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.