人体背部负重行走时足底压力分布研究

Study on Plantar Pressure Distribution of People Walking with Different Backpack Load

针对人体背部不同的负重量对其行走时足底压力的影响,采用三维测力台系统,对20名青年大学生背部负重行走时的地面反力进行数据采集,并做出特征双峰曲线。运用统计学方法对曲线上的7个特征量进行分析。结果表明,随着背部负重量的增加,测试者行走时的足底压力也随之增大,且呈现出一定程度上的性别差异:对于男性测试者,当背部负重量达到体重的17%时,足底压力开始发生变化,至20%负重时,足底压力已存在显著性差异;对于女性测试者,当背部负重量达到体重的14%时,足底压力开始发生变化,至15%负重时,足底压力即已存在较显著的差异。

The purpose of this study was to investigate the effect of different backpack load on the plantar pressure of people during walking. By using three-dimensional force platform system, we collected the ground reaction force data from 20 college students, who were carrying different loads on their backs, and then we transformed the data into a characteristic two-peak curve. Seven characteristic parameters on the curve were selected and analyzed by using sta- tistical methods. The results indicated that the peak ground reaction forces increased as the loads increased. Furthermore, in consideration of different genders, the amount increased was different. For the male subjects, when backpack load reached 17 % body weight, changes in ground reaction force began to take place until the backloads reached 20 % body weight changes in ground reaction force induced a significant difference. For the female subjects, changes in ground reaction force began to take place with loads up to 14% body weight and while it reached 15% body weight it induced a significant difference.