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首页> 外文期刊>Journal of electromyography and kinesiology: Official journal of the International Society of Electrophysiological Kinesiology >How does lever length and the position of its axis of rotation influence human performance during lever wheelchair propulsion?
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How does lever length and the position of its axis of rotation influence human performance during lever wheelchair propulsion?

机译：杠杆轮椅推进过程中杠杆的长度及其旋转轴的位置如何影响人类的表现？

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摘要

The purpose of this study was to investigate empirically how lever length and its axis of rotation position influences human performance during lever wheelchair propulsion. In order to fulfill this goal, a dedicated test stand allowing easy implementation of various lever positions was created. In the experiment, 10 young, healthy, male subjects performed 8 tests consisting of propulsion work with levers of different lengths and lever axis of rotation positions. During tests heart rate, oxygen consumption and EMG assessment of 6 muscles was carried out. Measurements of power output on the test stand were done as well. Together with oxygen consumption analysis, this allowed calculation of human work efficiency. The results show significant (p < 0.05 and p < 0.001) differences between lever configurations when comparing various parameters values. From the carried out experiments, the authors conclude that levers' length and their axis of rotation position significantly influence human performance during lever wheelchair propulsion. For the examined subjects, placing the levers' axis of rotation close behind the back wheels axis of rotation offered advantageous work conditions. (C) 2015 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是凭经验研究杠杆长度及其旋转轴位置如何影响杠杆轮椅推进过程中的人的表现。为了实现这一目标，创建了一个专用的测试台，可以轻松实现各种杠杆位置。在该实验中，有10位年轻，健康的男性受试者进行了8次测试，包括对不同长度的杠杆和杠杆旋转轴位置的推进工作。在测试期间，对6块肌肉进行心率，耗氧量和EMG评估。测试台上的功率输出也已完成测量。结合耗氧量分析，可以计算人员的工作效率。结果表明，在比较各种参数值时，杠杆配置之间存在显着差异（p <0.05和p <0.001）。从进行的实验中，作者得出结论，杠杆的长度及其旋转轴的位置在杠杆轮椅推进过程中会显着影响人类的表现。对于检查对象，将杠杆的旋转轴紧靠后轮的旋转轴后方可提供有利的工作条件。 （C）2015 Elsevier Ltd.保留所有权利。

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