The Clarification of the Strategy during Sit-to-Stand Motion from the Standpoint of Mechanical Energy Transfer
The Clarification of the Strategy during Sit-to-Stand Motion from the Standpoint of Mechanical Energy Transfer
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DOI：
10.1589/jpts.24.231
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发表时间：
2012-04-01
影响因子：
--
通讯作者：
Shinkoda, Koichi
中科院分区：
文献类型：
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作者：
Anan, Masaya;Ibara, Takuya;Shinkoda, Koichi
[目的]从机械能流的角度，探讨健康青年人在坐立运动（STS）中的运动策略，以及躯干和小腿前倾运动（被认为是重心前移的原因）与下肢关节所承受负荷之间的关系。[受试者]受试者是10名年轻健康男性，没有疾病和/或有影响STS的病史。[方法]采用3种任务条件：正常STS（条件N）、躯干尽可能前倾STS（条件TM）和躯干尽可能垂直STS（条件TV）。STS过程中的运动学数据采用三维运动分析系统采集，动力学数据采用测力板采集。[结果] TV条件下胫骨近端平均负功率显著高于N和TM条件。[结论]小腿前倾主要是一种促进膝关节伸展的反应性运动，而不是促进重心前移。因此，躯干前倾运动量越少，对小腿前倾运动能力的要求就越高。
[Purpose] This study aimed to clarify the motion strategy used by young healthy adults during sit-to-stand motion (STS) and to investigate the relationship between forward tilt movement by the trunk and shanks, which is considered to contribute to the forward shift of COG, and the load on the lower extremity joints accept, from the standpoint of mechanical energy flow. [Subjects] The subjects were 10 young healthy males without disease and/or present history of illnesses that would affect STS. [Methods] Three kinds of task conditions were adopted: normal STS (condition N), STS with the trunk tilted as forward as possible (condition TM), and STS with the trunk as vertical as possible (condition TV). The kinematic data during STS were collected using a three-dimensional motion analysis system, and the kinetic data were collected by force plates. [Results] The average negative power in the proximal portions of the shank under condition TV was significantly higher than that under conditions N and TM. [Conclusion] Shank forward tilt appears to be primarily a reactive movement facilitating knee extension rather than contributing to moving COG forward. Thus, less trunk forward tilt movement results in the requirement of higher ability of shank forward tilt movement.