Differences in biomechanical characteristics of sit-to-walk motion between younger and elderly males dwelling in the community
Differences in biomechanical characteristics of sit-to-walk motion between younger and elderly males dwelling in the community
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DOI：
10.1589/jpts.20.185
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发表时间：
2008-08-01
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：
Kouta, Munetsugu;Shinkoda, Koichi
[目的]本研究的目的是澄清年轻人（YG）和老年人（EG）之间的坐立行走（STW）运动的差异。[受试者与方法] 27名受试者（YG组9名，EG组18名）被要求进行STW，并以舒适速度和最大速度步行3 m。使用3D运动捕捉系统获得运动学数据，并使用两个测力板获得动力学数据。[结果]两组在舒适速度和最大速度下完成STW所需时间相似，但YG组的重心前移速度（COG-WB）更快，且第一次足跟着地时的重心上移速度更快。地面反作用力分析表明，各组之间存在许多差异。对于YG，COG-WB向前移动并且第一摆动侧比EG长。[结论]离趾前的前向和侧向COG-WB运动产生前进力。我们认为YG受试者的下肢可能有足够的肌肉力量来承受前进的力量，或者EG受试者可能已经学会了预期姿势控制，由于衰老和身体机能下降，这种姿势控制的向前运动时间更短。
[Purpose] The purpose of this study was to clarify the difference in sit-to-walk (STW) motion between young adults (YG) and an elderly persons (EG). [Subjects and Methods] Twenty-seven subjects (9 in YG and 18 in EG) were instructed to perform STW and to walk 3 m at a comfortable speed and at maximal speed. Data were obtained using a 3D motion capture system for kinematic data, and two force plates for kinetic data. [Results] The time required for STW was similar for both groups at both comfortable and maximal speeds, but the forward velocity of the center of gravity of the whole body (COG-WB) was higher for YG, and upward COG-WB at the time of the first heel contact was faster for YG. Ground reaction force analyses showed many differences between the groups. For YG, COG-WB moved forward and the first swing side was longer than for EG. [Conclusion] Forward and lateral COG-WB movements before the toe-off generate a progressive force. We suggest that YG subjects may have sufficient muscle power in their lower extremity to bear the progressive force, or that EG subjects may have learned anticipatory postural control which has shorter forward movement due to aging and declining physical function.