![]() Identifying the ideal body size and shape characteristics associated with children’s physical performance tests in Peru. Developing a new curvilinear allometric model to improve the fit and validity of the 20-m shuttle run test as a predictor of cardiorespiratory fitness in adults and youth. Nevill AM, Ramsbottom R, Sandercock G, Bocachica-González CE, Ramírez-Vélez R, Tomkinson G. Validation of equations to estimate the peak oxygen uptake in adolescents from 20 metres shuttle run test. Menezes-Junior FJ, Jesus ÍC, Mota J, et al. Twenty-metre shuttle run: (mis)representation, (mis)interpretation and (mis)use. These observations provided powerful evidence that allometric models are more than satisfactory in terms of both criterion and construct validity when predicting CRF (V˙O2peak) using the 20mSRT.Ĭopyright © 2021 by the American College of Sports Medicine.Īrmstrong N, Welsman J. This will more accurately reflect the nonlinear rise in energy demand of shuttle running as the test progresses to exhaustion. The allometric model also revealed that the rise in energy cost (V˙O2peak) with increasing laps was exponential. However, the allometric model identified a height-to-mass ratio, not dissimilar to the inverse body mass index (known to be a measure of leanness), to be associated with CRF. The criterion validity values of both the linear and the allomeric models were found to be acceptable, with R2 = 82.5% and 82.7% respectively, providing reassuring evidence that the 20mSRT can be used with confidence to predict CRF. Alternative allometric models were also proposed/fitted using the 20mSRT (laps), height, and body mass. Multiple linear regression methods were applied to develop the linear models using the 20mSRT (laps), body mass index, and body fat percentage. V˙O2peak was measured using a gas analyzer in both maximal exercise tests in the laboratory and the 20mSRT. Adolescents were randomly assigned to validation (n = 91) and cross-validation (n = 57) groups. The study included 148 adolescents (43% girls) age 13.37 ± 1.84 yr. Therefore, we aimed to compare a new linear model with an alternative allometric model to predict CRF (peak oxygen uptake, V˙O2peak) using the 20mSRT. Despite these doubts, authors continue to provide powerful evidence that CRF can be predicted reliably using the 20mSRT albeit using contrasting models. ![]() Recently, doubts have been raised concerning the validity of the 20-m shuttle run test (20mSRT) to predict cardiorespiratory fitness (CRF) in youth. ![]()
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