Equações para a previsão da potência aeróbia (VO2) de jovens adultos Brasileiros

Abstract

Background: VO2 may be predicted with base on anthropometric and physiological parameters for determined populations. Objective: To propose models for submaximal and maximal VO2 prediction in young Brazilian adults. Methods: A total of 137 volunteers (92 men) underwent graded maximal exercise test (GXT) in a cycle ergometer (Monark™, Br). Gas exchange and respiratory measurements were performed in an open circuit (Aerosport™ TEEM 100, USA). In another group, 13 volunteers underwent GXT and a square wave test (SWT) in order to evaluate the external validity of Neder et al's formula, ACSM's formula, and of Åstrand-Ryhming nomogram. The study design chosen was a cross-validation and the significance level was set at p ≤ 0.05. Results: For men during submaximal exercises, a mathematical model was deduced with base on workload, body mass, and age, which explained 89% of the VO 2 variation, with SEE (standard error of the estimate) = 0.33 l.min-1. For the maximum load in the male group, another model with the same variables explained 71% of VO2 variation, with SEE = 0.40 l.min-1. For women, 93% of VO2 variation could be explained, with SEE = 0.17 l.min-1, both in submaximal and maximal exercise, with only one equation by use e of the same independent variables. Conclusion: The models derived in the present study proved to be accurate to predict submaximal and maximal VO2 in young Brazilian adults.