Kito Tomonori, Yoneda Tsugutake
Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiragagakuendai, Inba, Chiba 270-1606, Japan.
Hum Mov Sci. 2006 Jun;25(3):383-92. doi: 10.1016/j.humov.2006.01.001. Epub 2006 Mar 24.
In gait research, casual walking has been considered to be walking at a casual speed. However, it is unclear that walking speed is the most stable factor in casual walking compared to other factors such as cycle duration and stride length. Although walking speed can be calculated from cycle duration and stride length, it is not necessarily the case that these parameters are "stable" in the same manner. We therefore conducted an experiment to determine which of these three parameters is most stable, regarding walking speed as cycle speed and using the coefficient of variation across gait cycles as index of stability. Ten participants were invited to walk in their own casual manner, once a week for a period of four weeks. Cycle duration was measured by means of a foot switch attached to the right heel. To measure the moving distance, participants towed a distance meter. Stride length and cycle speed were measured using this device. Over the four-week period, cycle duration and stride length were stable, whereas cycle speed was the most variable parameter. Furthermore, in the results for each single day, the cycle duration was significantly more stable than the other parameters. These results suggest that, when we walk casually, cycle duration is the dominant factor, rather than stride length or walking speed.
在步态研究中，随意行走被认为是以随意的速度行走。然而，与诸如周期时长和步幅等其他因素相比，行走速度是否是随意行走中最稳定的因素尚不清楚。虽然行走速度可以从周期时长和步幅计算得出，但这些参数不一定以相同的方式“稳定”。因此，我们进行了一项实验，将行走速度视为周期速度，并使用步态周期的变异系数作为稳定性指标，以确定这三个参数中哪个最稳定。邀请了10名参与者以自己随意的方式行走，每周一次，为期四周。周期时长通过连接在右脚后跟的脚踏开关进行测量。为了测量移动距离，参与者拖着一个测距仪。使用该设备测量步幅和周期速度。在四周的时间里，周期时长和步幅是稳定的，而周期速度是最可变的参数。此外，在每天的结果中，周期时长比其他参数明显更稳定。这些结果表明，当我们随意行走时，周期时长是主导因素，而不是步幅或行走速度。
