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A VELOCIDADE CRÍTICA COMO PREDITOR DE DESEMPENHO AERÓBIO EM CRIANÇAS CRITICAL SPEED AS A PREDICTOR OF AEROBIC PERFORMANCE IN CHILDREN

To compare times achieved in a 1,600m rural road run with the times predicted from critical speed, in addition to verify any association between critical speed and VO 2 max with the aerobic performance (1,600m time) of children. The sample consisted of 25 boys and 39 girls, aged 9 to 11 years. Their critical speeds were determined using the work versus time model, performed in the 200m and 800m maximum runs. The value of VO 2 max was measured using a 20-meter shuttlerun test. Endurance performance was determinate from the time obtained in a rural 1,600m road run. Statistical procedures used were descriptive analyses, Student’s t test and Pearson’s moment correlation, with signifi cance level set at p<0.05. The times achieved for aerobic performance were signifi cantly lower than the performance predicted from critical speed, for both sexes (males: 8.43 ± 0.78 min versus 10.16 ± 1.37 min; females: 9.09 ± 0.75 min versus 10.30 ± 1.09 min) (p=0.0001). Signifi cant inverse relationships were observed between critical speed and aerobic performance for both subsets (males: r= -0.52; females: r= -0.70), and between VO 2 max and aerobic performance in the case of females (r= -0.48). In this study critical speed was not shown to be a predictor of performance in a 1,600m road run. However, the signifi cant correlations observed suggest that critical speed could be used as a tool to control endurance training in children.