Biomechanical analysis of gait termination in 11-17 year old youth at preferred and fast walking speeds
Biomechanical analysis of gait termination in 11-17 year old youth at preferred and fast walking speeds
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DOI：
10.1016/j.humov.2016.07.001
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发表时间：
2016-10-01
影响因子：
2.1
通讯作者：
Richards, James G.
中科院分区：
文献类型：
--
作者：
Ridge, Sarah Trager;Henley, John;Richards, James G.
在行走和/或停止可能困难的人群中，例如脑瘫儿童，快速停止行走的能力可能超出了儿童的能力。物理治疗可以改善步态终止。然而，如果不更好地了解这项技能的机械要求，治疗计划就很困难。这项研究的目的是了解健康儿童在快速行走时如何成功一步终止步态，即使对于健康儿童来说这也是一项挑战。收集了 15 名青少年在执行步行、计划内和计划外停止任务时的下肢运动学和动力学数据。每次停止任务都是在受试者以他/她喜欢的速度和较快的速度行走时执行的。同一停止任务的速度条件（首选和快速）之间最显着的力学变化是更大的膝关节屈曲角度（计划外：+16.49 +/- 0.54 度，p = 0.00；计划：+15.75 +/- 1.1 度，p = 0.00）和膝关节伸展力矩（计划外：+0.67 +/- 0.02 N/kgm，p = 0.00；计划： +0.57 +/- 0.23 N/kgm, p = 0.00) 以更快的速度。维持停止位置所需的额外关节活动范围和额外肌肉力量表明，伸展和加强下肢关节（尤其是膝盖）周围的肌肉可能是一种有用的干预措施。 (C) 2016 年由 Elsevier B.V. 出版
In populations where walking and/or stopping can be difficult, such as in children with cerebral palsy, the ability to quickly stop walking may be beyond the child's capabilities. Gait termination may be improved with physical therapy. However, without a greater understanding of the mechanical requirements of this skill, treatment planning is difficult. The purpose of this study was to understand how healthy children successfully terminate gait in one step when walking quickly, which can be challenging even for healthy children. Lower extremity kinematic and kinetic data were collected from 15 youth as they performed walking, planned, and unplanned stopping tasks. Each stopping task was performed as the subject walked at his/her preferred speed and a fast speed. The most significant changes in mechanics between speed conditions (preferred and fast) of the same stopping task were greater knee flexion angles (unplanned: +16.49 +/- 0.54 degrees, p = 0.00; planned: +15.75 +/- 1.1 degrees, p = 0.00) and knee extension moments (unplanned: +0.67 +/- 0.02 N/kgm, p = 0.00; planned: +0.57 +/- 0.23 N/kgm, p = 0.00) at faster speeds. The extra range of motion in the joints and extra muscle strength required to maintain the stopping position suggests that stretching and strengthening the muscles surrounding the joints of the lower extremity, particularly the knee, may be a useful intervention. (C) 2016 Published by Elsevier B.V.