Adaptations in physiology and propulsion techniques during the initial phase of learning manual wheelchair propulsion
Adaptations in physiology and propulsion techniques during the initial phase of learning manual wheelchair propulsion
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DOI：
10.1097/01.phm.0000069941.77921.aa
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发表时间：
2003-07-01
影响因子：
3
通讯作者：
van der Woude, LHV
中科院分区：
文献类型：
--
作者：
de Groot, S;Veeger, HEJ;van der Woude, LHV
目的：本研究的目的是分析适应在毛机械效率和轮椅推进技术在新手健全的科目在学习手轮辋wheelchair propulsion.Design的初始阶段：9个健全的科目进行了3个4分钟的实践块上的轮椅测力计。所有块的外部功率输出和速度分别为0.25 W/kg和1.11 m/sec。总机械效率，力的应用，定时，和intercycle变异measured.Results：总机械效率没有变化被发现，但是，在推动频率发生下降，这是伴随着增加的工作，每周期和减少的百分比推动时间。每循环功的增加与更高的峰值扭矩相关。没有变化，周期间的变异性是可见的随着时间的推移。结论：学习手动轮椅推进的初始阶段的时间变量已经改变。然而，对于其他变量，如力的生产，总机械效率，和周期间的可变性，一个较长的实践周期可能是必要的，以引起变化。从学习开始，有效的力量方向似乎就被优化了。
Objective: The purpose of this study was to analyze adaptations in gross mechanical efficiency and wheelchair propulsion technique in novice able-bodied subjects during the initial phase of learning hand-rim wheelchair propulsion.Design: Nine able-bodied subjects performed three 4-min practice blocks on a wheelchair ergometer. The external power output and velocity of all blocks was, respectively, 0.25 W/kg and 1.11 m/sec. Gross mechanical efficiency, force application, timing, and intercycle variability were measured.Results: No change in gross mechanical efficiency was found. However, a decrease in push frequency occurred, which was accompanied by an increase in work per cycle and a decrease in percentage push time. The increase in work per cycle was associated with a higher peak torque. No changes in intercycle variability were visible over time.Conclusions: The timing variables had already changed during the initial phase of learning manual wheelchair propulsion. However, for, other variables, such as force production, gross mechanical efficiency, and intercycle variability, a longer practice period might be necessary to induce a change. The effective force direction seemed to be optimized from the start of the learning process onward.