Fukuoka Y, Gwon O, Sone R, Ikegami H
Institute of Health and Sport Sciences, University of Tsukuba, Japan.
Acta Physiol Scand. 1995 Feb;153(2):117-24. doi: 10.1111/j.1748-1716.1995.tb09842.x.
The purpose of this study was to evaluate the specificity of maximal oxygen uptake (VO2max) and the dynamic response of oxygen uptake (VO2) to sinusoidal work load in distance runners and in American-football players. Sinusoidal work load during ergometer cycling was carried from 30 W to 60% to VO2max (60% VO2max) for a 2 min period. VO2 was measured by the breath-by-breath method. The subjects were 10 distance runners (DRs), 10 American-football players (AFPs), and 11 untrained men (UTM). Mean VO2max was 64.4 mL kg-1 min-1 in the DRs, 53.1 mL kg-1 min-1 in the AFPs and 47.3 mL kg-1 min-1 in the UTM. The fundamental amplitudes of the VO2 response, normalized by dividing by steady state VO2 at 60% VO2max, were similar in the AFPs (20.3%) and the UTM (19.5%), and both were significantly less than in the DRs (25.5%). Phase shift to work load expressed in degrees was similar in the AFPs (87.7 degrees) and UTM (88.0 degrees), but significantly greater than in the DRs (80.4 degrees). HR dynamics in all three groups were similar to a dynamic VO2 response. These findings suggest that development of the dynamic VO2 response and higher VO2max is achieved in the DRs. They also suggest that despite the higher VO2max in the AFPs there is no improvement in the dynamic VO2 response. The results of the present study demonstrate that athletes participating in different sports have characteristic dynamic VO2 responses during cycling exercise.
本研究旨在评估长跑运动员和美式橄榄球运动员最大摄氧量（VO2max）的特异性以及摄氧量（VO2）对正弦波工作负荷的动态反应。在测力计骑行过程中，正弦波工作负荷从30瓦增至60%VO2max，持续2分钟。采用逐次呼吸法测量VO2。受试者包括10名长跑运动员（DRs）、10名美式橄榄球运动员（AFPs）和11名未受过训练的男性（UTM）。DRs的平均VO2max为64.4 mL·kg-1·min-1，AFPs为53.1 mL·kg-1·min-1，UTM为47.3 mL·kg-1·min-1。VO2反应的基本振幅，通过除以60%VO2max时的稳态VO2进行归一化，在AFPs（20.3%）和UTM（19.5%）中相似，且均显著低于DRs（25.5%）。以度表示的工作负荷相移在AFPs（87.7度）和UTM（88.0度）中相似，但显著大于DRs（80.4度）。三组的心率动态与动态VO2反应相似。这些发现表明，DRs实现了动态VO2反应的发展和更高的VO2max。它们还表明，尽管AFPs的VO2max较高，但动态VO2反应并无改善。本研究结果表明，参与不同运动的运动员在骑行运动中具有特征性的动态VO2反应。
