Reliability and reproducibility of maximal oxygen uptake measurement in children

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Abstract
Xygen uptake (< 2.1 ml/kg$min) during the last work loads before fatigue. The mean values for T1 and T2 were not significantly different for any of the measurements made; the reproducibility was considered to be high. The reliability of the measures varied with the presence or absence of a plateau at maximum, for example; $o2 max, plateau r = 0.74, no plateau r = 0.27; heart rate, plateau r = 0.92, no plateau r = 0.40. The differences between the mean values for the “double plateau” group when compared to the “no plateau” group were not significant for $o2 max, HR or $E. The differences were significant for the post-exercise blood lactate and respiratory exchange values at T2 only; the “double plateau” group reached higher values in each case (R = 1,00 vs 0.92; blood lactate 6.5 vs 5.4 mM/1). ©1977The American College of Sports Medicine...