Kinematics of center of mass and center of pressure predict friction requirement at shoe-floor interface during walking.
Kinematics of center of mass and center of pressure predict friction requirement at shoe-floor interface during walking.
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质心和压力中心的运动学预测步行期间鞋与地板界面的摩擦需求。
DOI：
10.1016/j.gaitpost.2012.11.007
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发表时间：
2013
期刊：
影响因子：
2.4
通讯作者：
K. Hokkirigawa
中科院分区：
文献类型：
--
作者：
Takeshi Yamaguchi;Masaru Yano;Hiroshi Onodera;K. Hokkirigawa
我们的目的是确定连接整个身体质心（COM）与压力中心（COP）的连线的倾斜角度（COM-COP角）是否有助于预测年轻成年男性在瞬时运动（如转身、步态终止和启动）以及稳态运动（如直走）的重量接受和推开阶段所需的摩擦系数（RCOF）。要求 17 名健康的年轻成年男性 (1) 沿直线行走，(2) 用任一脚旋转 60°（步进和旋转），以及 (3) 在干燥的水平地板上开始和终止行走。计算重量接受和推出阶段期间合成的水平和垂直地面反作用力之间的比率的峰值绝对值（分别为RCOF和RCOFt）。还分别计算了 RCOF 和 RCOFt 瞬间的 COM-COP 角度θ和θt。双变量回归分析表明|θh|和|θt|切线分别是 RCOFh（R= 0.878；R2= 0.770；p < 0.001）和 RCOFt（R= 0.918；R2= 0.843；p < 0.001）的显着预测因子。结果表明，COM 和 COP 运动学（即 COM-COP 角度）可以预测稳态运动（例如直走）和瞬态运动（例如转弯以及步态终止和启动）中重量接受和推离阶段的摩擦需求。
We aimed to determine whether inclination angles of the line connecting the whole body center of mass (COM) to the center of pressure (COP) (COM–COP angle) help predict the required coefficient of friction (RCOF) in young adult males during the weight acceptance and push-off phases in transient movements such as turning, gait termination and initiation, and steady-state movements such as straight walking. Seventeen healthy young adult males were asked to (1) walk in a straight line, (2) turn 60° with either foot (step and spin turns), and (3) initiate and terminate walking on a dry level floor. Peak absolute values of the ratio between resultant horizontal and vertical ground reaction forces during the weight acceptance and push-off phases (RCOFhand RCOFt, respectively) were calculated. COM–COP anglesθhandθtat the instant of RCOFhand RCOFt, respectively, were also calculated. Bivariate regression analysis demonstrated that the |θh| and |θt| tangents were significant predictors of RCOFh(R= 0.878;R2= 0.770;p< 0.001) and RCOFt(R= 0.918;R2= 0.843;p< 0.001), respectively. The results suggest that COM and COP kinematics (i.e., the COM–COP angle) serve as a predictor of friction requirement during the weight acceptance and push-off phases in steady-state movements such as straight walking and transient movements such as turning as well as gait termination and initiation.