Study on evaluation of the center of foot pressure during standing and stepping by using a stabilometer

本研究历时3年，1992-1994年，目的是建立一种测量人体在站立、踏步等体育运动中摇摆的方法，并利用稳定仪和微型计算机对其数据进行分析。使用稳定计（1G06）测量每位受试者站立、行走、躯干或头部运动时足压中心（CFP）的X和Y分量的一系列位置数据。这些数据被转换为PC-9801微型计算机上的数字数据并进行分析。还设计了一种直接校准稳定计数据的方法。在北内大学医院就诊的285名正常受试者（198名男性，87名女性）中，研究了人类双脚站立、睁眼和闭眼时出现的衰老效应。通过比较每10年组总摇摆路径长度的平均值和标准差与20年组的值，发现男性60岁和70岁受试者在睁眼站立时身体摇摆增加（P<0.05），女性70岁受试者在睁眼站立时身体摇摆增加（P<0.01）。使用稳定计研究了CFP在行走和几种直立姿势运动中的运动。在踏步的摇摆阶段，CFP快速向前后向后移动，并伴有快速的侧向移动到另一侧；在站立阶段，CFP的侧向移动最多，然后是少量的向前内侧，然后是向后的侧向偏移。躯干前倾和后倾时的身体摆动，躯干侧向和扭转分别在水平方向、垂直方向和水平-垂直方向上主导CFP运动。

This study has been performed for 3 years, 1992-1994, for the purpose to establish a method to measure human body sways during standing, stepping and other physical exercises and to analyze their data by using a stabilometer and micro-computer.1. A series of position data of both X and Y components of the center of the foot pressure(CFP) in each subject, standing, stepping and doing truncal or head movements, were measured by using a stabilometer(1G06). Those data were transformed to a PC-9801 microcomputer as digital data and were analyzed. A direct method to calibrate the data from a stabilometer was also devised.2. Aging effects, appeared in human standing on both feet with eyes open and closed, were investigated in normal 285 subjects who had visited Kitasato Univ. Hospital(198 males and 87 females). By comparing the mean value and standard deviation of the length of total sway path in the group of each decade with the values in the group of 2 decades, increase of body sway was demonstrated in male subjects of 6 and 7 decades (P<0.05) and in females of 7 decades (P<0.01) during standing with eyes open but not with eyes closed.3. Movements of the CFP during stepping and several exercises on erect posture were investigated by using a stabilometer. At the swing phase of stepping, CFP moved quickly forward and then backward in association with rapid lateral shift to the other side and at the stance phase the most lateral shift of CFP, which followed by a little forward medial, and then, backward lateral deviations were demonstrated. Body sways during inclination of the trunk in fore and backward, and lateral directions and twist of the trunk gave dominant movements of CFP in the horizontal, vertical and horizontal-vertical directions, respectively.