Abstract
Introduction: Cardiorespiratory fitness is one of the leading health indicators. Its evaluation can be carried out by a maximal test in which the maximum oxygen consumption (VO2max) is measured. Although fitness is a good predictor of cardiometabolic risk, it is not evaluated in the health control of children and adolescents.
Objective: The purpose of this study was to investigate whether a short 3-minute step protocol can be used to estimate maximal oxygen consumption in the pediatric population.
Materials and Methods: Adolescents without pathological antecedents Their nutritional status was evaluated according to WHO standards. A step test-retest and a maximal treadmill test were applied to measure VO2max. Subsequently, concordance, correlation and linear regression analyses were performed to identify the reproducibility of the test and the VO2max predictors obtained from the step test and develop the VO2max estimation model. The ethics committee approved the study; the tutors signed informed consent and the subject’s consent.
Results: 15 subjects entered the study. In the test-re test, the concordance analysis yielded a Bias -5.3 (CI: -18.36 / 8.036). Correlation between final heart rate at three minutes in both tests was r = 0.9247 (p < 0.0001). The linear regression generated a predictive value of Y = -0.2868X + 77.34 (R = -0.6396, p = 0.0102).
Conclusions: In the studied sample, the step test turned out to be a valid test to estimate oxygen consumption in a paediatric population. Its validation serves as a low cost and valuable tool in a clinical context.
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