MECHANICS OF WALKING
MECHANICS OF WALKING
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DOI：
10.1152/jappl.1966.21.1.271
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发表时间：
1966-01-01
影响因子：
3.3
通讯作者：
MARGARIA, R
中科院分区：
文献类型：
--
作者：
CAVAGNA, GA;MARGARIA, R
用灵敏平台测量了不同速度(3~12公里/小时)步行时脚在地面上的垂直和正面推力分量，计算了反重力功Wv和向前速度变化功Wf。分析了WV和WF随速度变化的特征规律。每一步的外功Wtot=Wv+Wf必须由肌肉活动来维持；相反，Wv和Wf本身都与肌肉活动没有直接关系，因为刚性的骨骼结构使动能转化为势能成为可能，反之亦然。两个阶段，其中肌肉执行外部正向功，在台阶循环中是明显的；这两个阶段被两个插入的阶段，其中执行负向功。
The vertical and the frontal components of the push exerted by the foot on the ground, walking at different speeds (3-12 km/hr), have been measured by means of a sensitive platform, the work against gravity, Wv, and the work due to velocity changes in forward direction, Wf, have been calculated. The characteristic patterns of WV and Wf as a function of speed have been analyzed. The external work per step, Wtot = WV + WF, must be sustained by muscular activity; both WV and WF alone, on the contrary, are not directly related with muscular activity, as the rigid skeletal structures make possible the transformation of kinetic energy into potential, and vice versa. Two phases, in which the muscles perform external positive work, are evidenced in the step cycle; these are separated by 2 interposed phases in which negative work is performed.