Klentrou P P, Montpetit R R
Département d'Education Physique, Université de Montréal, Québec, Canada.
Med Sci Sports Exerc. 1992 Mar;24(3):371-5.
The aims of this study were to compare the oxygen demand of back crawl in male and female competitive swimmers and to examine the effect of stroke mechanics on these costs. Twenty-two male and 16 female swimmers participated in the study. The VO2 increased with v2 to a peak of approximately 4.03 l.min-1 in males and of approximately 2.88 l.min-1 in females. Mean VO2 of the males at a given v was significantly higher than that of the female swimmers, but the slopes of the regression lines were identical. Increases of velocity in both groups were related to increases in f and a decrease in distance. Costs per stroke (ml O2.str-1) in males were significantly higher than in females at a v = 1.0, 1.1, and 1.2 m.s-1. The relationship between VO2 and body mass at v = 1.1 m.s-1 was evaluated by deriving the exponent b in the allometric equation VO2 = a Mb. The exponent b was found to be 0.55. These results indicate that submaximal VO2 in back crawl swimming does not increase in proportion to body mass and may explain why VO2 (l.min-1) has been found to be higher in males than in females.
本研究的目的是比较男女竞技游泳运动员仰泳的需氧量，并研究划水力学对这些消耗的影响。22名男性和16名女性游泳运动员参与了该研究。男性的摄氧量随速度平方增加，峰值约为4.03升/分钟，女性约为2.88升/分钟。在给定速度下，男性的平均摄氧量显著高于女性游泳运动员，但回归线的斜率相同。两组速度的增加都与划频增加和划距减小有关。在速度为1.0、1.1和1.2米/秒时，男性每划水的消耗（毫升氧气/划）显著高于女性。通过推导异速生长方程VO2 = a Mb中的指数b，评估了速度为1.1米/秒时摄氧量与体重之间的关系。发现指数b为0.55。这些结果表明，仰泳中次最大摄氧量与体重不成比例增加，这可能解释了为什么男性的摄氧量（升/分钟）高于女性。
