Knowlton R G, Fitzgerald P I, Sedlock D A
Can J Appl Sport Sci. 1981 Dec;6(4):187-90.
Few previous studies have attempted to study the response of disabled women to work in a wheelchair. The purpose of this study was to investigate the mechanical efficiency of wheelchair dependent women (WCD) during progressively loaded wheelchair ergometry. Five WCD subjects with an average confinement of 17.8 years were compared to five able bodied women (AB). Neither maximal oxygen uptake, 1.121 WCD and 1.485 AB (L X min-1) or maximal power outputs, 41.6 WCD and 44.1 AB (watts) were significantly different for the groups. The WCD group, however, demonstrated significantly higher mechanical efficiencies at comparable power outputs, p greater than 0.05. This difference remained when comparisons at about 60, 80, and 90% of VO2 max were made. The average efficiencies over these metabolic levels were 14% WCD and 10.6% AB. Stroke length consistently reduced as power outputs increased with the values lower for the WCD subjects. Average values for the submaximal workloads were 3.17 WCD and 3.76 AB (m x stroke-1) which meant a difference that was 18.6% greater in length for the AB group. The possible influence of this upon the efficiency of wheelchair locomotion was discussed.
以往很少有研究试图探讨残疾女性使用轮椅工作时的反应。本研究的目的是调查依赖轮椅的女性（WCD）在逐渐增加负荷的轮椅测力计测试过程中的机械效率。将5名平均受限制17.8年的WCD受试者与5名健全女性（AB）进行比较。两组的最大摄氧量（WCD组为1.121，AB组为1.485，升/分钟）或最大功率输出（WCD组为41.6，AB组为44.1，瓦特）均无显著差异。然而，在相当的功率输出下，WCD组的机械效率显著更高，p大于0.05。当在约60%、80%和90%的最大摄氧量水平进行比较时，这种差异仍然存在。在这些代谢水平上的平均效率分别为WCD组14%和AB组10.6%。随着功率输出增加，步幅长度持续减小，WCD受试者的值更低。次最大工作量的平均值分别为WCD组3.17和AB组3.76（米/步），这意味着AB组的步幅长度差异大18.6%。讨论了这一点对轮椅移动效率的可能影响。
