Danion F, Varraine E, Bonnard M, Pailhous J
UMR 6152 Mouvement et Perception, Faculté des Sciences du Sport, CNRS, Université de la Méditerranée, 163 avenue de Luminy, 13 288 Marseille, France.
Gait Posture. 2003 Aug;18(1):69-77. doi: 10.1016/s0966-6362(03)00030-4.
This study focused on spatial and temporal variability of the stride in human gait. We determined the role of stride frequency (F) and stride length (L) on those parameters. Eight healthy subjects walked on a treadmill using 25 different FL combinations (0.95<L<1.5 m, and 0.8<F<1.26 Hz). The results showed that spatial and temporal variabilities tend to increase in concert with respect to change in stride parameters. In addition, stride variability was found (1) to be minimal at F=1 Hz; and (2) to increase with smaller L. During additional trials, subjects walked freely at various speeds. Although it is generally hypothesized that freely chosen behaviors are optimal in terms of variability, our data show that this is not always the case in human gait.
本研究聚焦于人类步态中步幅的空间和时间变异性。我们确定了步频（F）和步长（L）对这些参数的作用。八名健康受试者在跑步机上以25种不同的FL组合行走（0.95<L<1.5米，0.8<F<1.26赫兹）。结果表明，空间和时间变异性往往会随着步幅参数的变化而协同增加。此外，发现步幅变异性（1）在F = 1赫兹时最小；（2）随着L变小而增加。在额外的试验中，受试者以各种速度自由行走。尽管一般假设自由选择的行为在变异性方面是最优的，但我们的数据表明，在人类步态中情况并非总是如此。
