不同年龄健康人平地行走时足底压力对比分析

针对年龄因素对成年人平地自然行走时足底压力的影响进行研究．采用三维测力台系统，对20名不同年龄段的健康成年人在平地自然行走时的地面反力进行数据采集，经归一化处理后得到足底压力在前后、左右、竖直3个方向上的力一时间曲线图，运用统计学方法对步态特征量进行统计分析，把不同年龄段人平地自然行走时的足底压力分布进行对比分析．结果表明，不同年龄段人在平地自然行走时的足底压力分布存在一定程度上的差异性：老年组在竖直方向和前后方向上的步态时间参量要小于青年组，这可能是由于老年人行走时步长较小，使得身体重心经过髋关节的时刻要早于青年人．

Comparative Analysis of Plantar Pressure in Normal People of Different Age During Level Walking

To investigate the influence of age on plantar pressure in normal people during level walking, ground reaction force data from 20 normal people of different age were collected through the employment of three-dimensional force plat- form system, and the force data in anterior-posterior, medio-lateral and vertical directions were normalized and transformed into force-time curves. Characteristic parameters were selected and analyzed by using statistical methods. The plantar pres- sure in normal people of different age was comparatively analyzed. Results show that a certain degree of difference was found in the plantar pressure distribution in normal people of different age during level walking： for the old group, the time parameters of gait in vertical and anterior-posterior direction came earlier than those in the young group. It may be due to the fact that the step length of the old person is smaller than that of the young person and the gravity center of the body crosses the hip earlier in the old group than in the young group.