THE DETERMINANTS OF THE STEP FREQUENCY IN WALKING IN HUMANS
THE DETERMINANTS OF THE STEP FREQUENCY IN WALKING IN HUMANS
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DOI：
10.1113/jphysiol.1986.sp016044
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发表时间：
1986-04-01
影响因子：
5.5
通讯作者：
FRANZETTI, P
中科院分区：
文献类型：
--
作者：
CAVAGNA, GA;FRANZETTI, P
行走过程中提升和加速质心所消耗的机械能。在保持在不同步进频率下的三个给定速度下测量：在任何给定速度下，所使用的步进频率越大，在以给定速度但具有不同步频的步行过程中，从自由步行过程中获得的先前数据计算相对于质心加速肢体所花费的机械功率，或Wint（Cavagna和Kaneko，1977）。在给定的步行速度下，Wint随步频而增加。总功率W tot = W ext + W int在比在相同速度下自由选择的步进频率小20-30%的步进频率处达到最小值。最小的步频Wtot以与自由行走期间的自然步频类似的方式随速度增加。
The mechanical power spent during walking in lifting and accelarating the centre of mass. .ovrhdot.Wext, has been measured at three given speeds maintained at different step frequencies: at any given speed, .ovrhdot.Wext is smaller the greater the step frequency used. The mechanical power spent in accelerating the limbs relative to the centre of mass during walking at a given speed, but with different step frequencies, .ovrhdot.Wint was calculated from previous data obtained during free walking (Cavagna and Kaneko, 1977). At a given walking speed, .ovrhdot.Wint increases with the step frequency. The total power, .ovrhdot.Wtot = .ovrhdot.Wext + .ovrhdot.Wint, reaches a minimum at a step frequency which is 20-30% less than the step frequency freely chosen at the same speed. The step frequency at which .ovrhdot.Wtot is minimum increases with speed in a similar way to the natural step frequecy during free walking.