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首页> 外文期刊>Gait & posture >Center of mass and base of support interaction during gait.
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Center of mass and base of support interaction during gait.

机译：步态中重心和支撑交互作用的基础。

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摘要

During gait the body is in a continuous state of imbalance, with each subsequent step preventing a fall. Gait balance is maintained by regulating the interactions between the center of mass (CoM) and base of support (BoS). The purpose of this study was to investigate the interaction of the CoM position and velocity (CoMv) in relation to the dynamically changing BoS throughout gait. This was quantified using: (1) The shortest distance from the CoM to the boundary of the BoS; (2) The distance from the CoM to the centroid of the BoS; and (3) The distance from the CoM to the BoS along the direction of the CoMv. These interactions were investigated in healthy young adults, healthy older adults, and elderly fallers, who performed level walking at a self-selected speed. Elderly fallers demonstrated a conservative CoM-BoS separation at toe off and reduced balance control ability, specifically a decreased time to contact, when compared to healthy young adults at heel strike. Decreased time available in responding to perturbations might result in a greater number of falls. Understanding foot position and CoM trajectories might allow for appropriate rehabilitation practices.
机译：在步态期间，身体处于不平衡的连续状态，随后的每个步骤都防止跌倒。通过调节质心（CoM）与支撑基础（BoS）之间的相互作用来维持步态平衡。这项研究的目的是调查与整个步态中动态变化的BoS相关的CoM位置和速度（CoMv）的相互作用。使用以下方法对此进行量化：（1）CoM到BoS边界的最短距离; （2）从CoM到BoS质心的距离; （3）从CoM到BoS沿CoMv方向的距离。在健康的年轻人，健康的老年人和老年跌倒者中研究了这些相互作用，他们以自行选择的速度进行水平步行。与健康的年轻成年人相比，脚下摔伤的老年人在脚趾分离时表现出保守的CoM-BoS分离，平衡控制能力降低，尤其是接触时间缩短了。可用于响应扰动的时间减少可能会导致更多的跌倒。了解脚的位置和CoM轨迹可能有助于采取适当的康复措施。

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