Abstract
This study was designed to determine the validity and reliability of the 9-min distance run in assessing cardiorespiratory fitness in third-grade children. Fifty-one children (27 girls and 24 boys) participated in at least one maximal cycle ergometer test to determine peak oxygen consumption (V̇O2peak) and in two 9-min runs. Significant (p < .01) test-retest intraclass correlations indicated that both the peak cycle ergometer test and the 9-min run were reliable measures in boys and girls and when the total sample was combined. Interclass correlations of r = .62 and r = .64 were attained between V̇O2peak (ml·kg−1·min−1) and 9-min Run 1 and 9-min Run 2, respectively. When data were separated by gender, 9-min Run 1 and 9-min Run 2 correlated to V̇O2peak (r = .56 and r = .48 for the girls and r = .65 and r = .71 for the boys, respectively). These results suggest that the 9-min distance run is a reasonably valid and highly reliable field test for estimating cardiorespiratory fitness in third-grade children.
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