Displacement of the pelvis during human walking: experimental data and model predictions
Displacement of the pelvis during human walking: experimental data and model predictions
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DOI：
10.1016/s0966-6362(97)00021-0
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发表时间：
1997-12-01
期刊：
影响因子：
2.4
通讯作者：
Hof, AL
中科院分区：
文献类型：
--
作者：
Zijlstra, W;Hof, AL
研究了在跑步机上行走时骨盆的位移与行走速度、步频和步幅的关系。用谐波分析方法描述了每步周期的位移曲线。简单的机械或几何模型的身体的质心（COM）轨迹在行走过程中被用来预测骨盆移位的幅度和时间。根据倒立摆模型预测，骨盆垂直方向位移的幅度与步幅大小有关。通过假设身体的最大势能和正动能相等来预测前后位移。左右位移的预测是基于一个假设步幅恒定和正弦运动模式的模型。与该模型一致的是，左右方向骨盆位移的幅值与步频有关。提出的模型提供了深入了解的机械机制，决定盆腔轨迹在行走。所提出的数据可能对步态障碍的临床评估有用。(C) 1997爱思唯尔科学有限公司
Displacements of the pelvis during treadmill walking were studied in dependence of walking speed, stride frequency and stride length. Displacement curves per stride cycle were described by means of harmonic analysis. Simple mechanical, or geometrical models of the body's center of mass (COM) trajectory during walking were used to predict amplitude and timing of pelvic displacements. As predicted by inverted pendulum models, the amplitude of pelvic displacement in vertical direction depended on stride length. Anterior-posterior displacements were predicted by assuming equal maxima of potential and forward kinetic energy of the body. Predictions for left-right displacements were based upon a model that assumed a constant stride width and a sinusoidal movement pattern. In agreement with this model, the amplitude of pelvic displacement in left-right direction depended on stride frequency. The presented models give insight into mechanical mechanisms which determine the pelvic trajectory during walking. The presented data may be useful in the clinical evaluation of gait disturbances. (C) 1997 Elsevier Science B.V.