不同年龄正常人步行后足底压力中心轨迹的变化

Changes of the center of plantar pressure at different ages after walking

目的探讨不同年龄组正常人步行后足底压力中心轨迹的变化。方法选取正常受试者50例,分为青年组和老年组,每组25例。采用AL-600型步态与平衡功能训练评估系统对2组受试者进行步态测试,分别测试2组受试者步行前、步行10 min后及步行15 min后步态相关参数变化,步态检测指标包括各时间段足底压力中心总轨迹长(COPD)、足底压力中心在左右(COPD-X)及前后(COPD-Y)方向的平均偏移。结果与组内步行前比较,老年组步行10 min及15 min后的COPD、COPD-X、COPD-Y均增大(P<0.05),青年组仅步行15 min后COPD[(37.73±2.16)cm]、COPD-X[(1.95±0.22)cm]、COPD-Y[(2.11±0.27)cm]增大(P<0.05)。老年组各时间点的COPD、COPD-X及COPD-Y均较青年组大(P<0.05)。结论老年人步行后的足底压力中心轨迹值增大;青年人步行初始阶段的足底压力中心轨迹值变化不大,但延长步行时间后,相关参数值增大,且步态稳定性下降。

Objective To explore any changes with age in the center of plantar pressure among normal people after walking.Methods Fifty healthy subjects were divided into a young group and an elderly group,each of 25.Gait descriptors were collected for each subject using a model AL-600 gait and balance training and evaluation apparatus.The gait descriptors were the center of pressure displacement(COPD),and the COPD in the medial-lateral(COPD-X)and anterior-posterior(COPD-Y)directions before and after 10 and 15 minutes of walking.Results The average COPD,COPD-X and COPD-Y of the elderly group increased after both 10 and 15 minutes of walking,but among the young group increases were observed only after 15 minutes.The average COPD,COPD-X and COPD-Y of the elderly group were always significantly larger than the young group′s averages.Conclusions Gait stability among the elderly decreases after as little as 10 minutes of walking,but among the young decreases are observed only after 15 minutes.