Peak Oxygen Uptake Responses to Training in Obese Adolescents: A Multilevel Allometric Framework to Partition the Influence of Body Size and Maturity Status

• Main Authors: Humberto M. Carvalho, Gerusa E. Milano, Wendell A. Lopes, António J. Figueiredo, Rosana B. Radominski, Neiva Leite
• Format: Article
• Language: English
• Published: Hindawi Limited 2013-01-01
• Series: BioMed Research International
• Online Access: http://dx.doi.org/10.1155/2013/618595

The influence of body size and maturation on the responses in peak oxygen uptake (VO2) to a 12-week aerobic training and nutritional intervention in obese boys (; 10–16 years) was examined using multilevel allometric regressions. Anthropometry, sexual maturity status, peak VO2, and body composition were measured pre- and postintervention. Significant decrements for body mass, body mass index z-score, and waist circumference and increments for stature, fat-free mass, and peak oxygen uptake were observed after intervention. Partitioning body size on peak VO2, the responses of the individuals to training were positive (11.8% to 12.7% for body mass; 7.6% to 8.1% for fat-free mass). Body mass and fat-free mass were found as significant explanatory variables, with an additional positive effect for chronological. The allometric coefficients () in the initial models were and for body mass and fat-free mass, respectively. The coefficients decreased when age was considered ( for body mass; for fat-free mass). Including maturity indicator in the models was not significant, thus the influence of variability in sexual maturity status in responses to exercise-based intervention in peak VO2 may be mediated by the changes in body dimensions.