Kirby R L, Price N A, MacLeod D A
J Biomech. 1987;20(4):423-7. doi: 10.1016/0021-9290(87)90049-2.
To test the hypothesis that variations in foot position would significantly affect standing balance, we studied ten normal subjects on a Kistler force platform which measured the travel and center of pressure displacement. With the feet together there was substantially more mediolateral (ML) travel than with the axes of the feet 15, 30 or 45 cm apart and the mean ML position of the center of pressure was displaced toward the right; there was no consistent effect on anteroposterior (AP) travel or position. As the right foot was placed 10 and 30 cm forward or back, the least amount of ML and AP travel occurred with the feet even or at 10 cm either direction; the mean AP and ML position moved toward the foot which was placed more posteriorly. Of the five foot angles ranging from toes-out 45 degrees to toes-in 45 degrees, the extent of ML and AP travel was lowest in the toes-out 25 degrees position and greatest in the toes-in 45 degrees position; the mean AP and ML position was farthest forward and to the right with toes-in 45 degrees. These findings have implications for the prosthetic replacement of the lower limbs, sports, ergonomics and postural sway studies.
为了验证足部位置变化会显著影响站立平衡这一假设，我们在一个测量行程和压力中心位移的奇石乐测力平台上对10名正常受试者进行了研究。双脚并拢时，与双脚轴线相距15厘米、30厘米或45厘米相比，左右（ML）行程明显更多，并且压力中心的平均ML位置向右偏移；对前后（AP）行程或位置没有一致的影响。当右脚向前或向后放置10厘米和30厘米时，双脚平齐或向任一方向相距10厘米时，ML和AP行程最少；平均AP和ML位置向放置得更靠后的脚移动。在从外八字45度到内八字45度的五个足部角度中，ML和AP行程的范围在25度外八字位置最低，在45度内八字位置最大；45度内八字时，平均AP和ML位置最靠前且最靠右。这些发现对下肢假肢置换、运动、人体工程学和姿势摆动研究具有启示意义。
