VALIDITY OF EQUATIONS FOR ESTIMATING (V) over dotO2PEAK FROM THE 20-M SHUTTLE RUN TEST IN ADOLESCENTS AGED 11-13 YEARS

Batista, MB, Cyrino, ES, Arruda, M, Dourado, AC, Coelho-E-Silva, MJ, Ohara, D, Romanzini, M, and Ronque, ERV. Validity of equations for estimating V.o(2)peak from the 20-m shuttle run test in adolescents aged 11-13 years. J Strength Cond Res 27(10): 2774-2781, 2013The aim of this study was to analyze the validity of 4 regression equations to estimate the peak oxygen consumption (V.o(2)peak) from the 20-m shuttle run test in adolescents aged 11-13 years. One hundred and fifteen adolescents, 61 boys (mean +/- SD: age = 12.3 +/- 0.9 years) and 54 girls (age = 12.1 +/- 0.7 years) performed the 20-m shuttle run test and an incremental progressive maximal test for direct V.o(2)peak analysis. Four linear regression equations were used to estimate the V.o(2)peak: Barnett et al. (equation 1), Leger et al. (equation 2), Mahar et al. (equation 3), and Matsuzaka et al. (equation 4). For boys, only the V.o(2)peak estimated by EQ3 did not differ from the value directly measured (p > 0.05). The EQ1, EQ2, and EQ4 underestimated the V.o(2)peak, whereas the EQ3 overestimated, particularly in girls (p < 0.05). Large limits of agreement were found between the reference method and the 4 equations, with higher estimated values by EQ2 for boys (8.36 +/- 15.24 mLkg(-1)min(-1)) and girls (2.45 +/- 12.63 mLkg(-1)min(-1)). The highest correlation values were observed by EQ4 for boys (r = 0.80), EQ1 for girls (r = 0.72), and EQ3 for total sample (r = 0.80). The equations analyzed were not precise for individual V.o(2)peak prediction; however, the EQ3 revealed better agreement, particularly for boys. Considering the data obtained in the boys and total sample, our results suggest that the EQ3 may provide the best predictive measure of V.o(2)peak from the 20-m shuttle run test in adolescents aged 11-13 years.