老年人下肢伸膝肌力对平衡功能的影响

目的 检测老年人下肢伸膝肌力是否对平衡功能有影响。方法 180名老年人根据性别和下肢伸膝肌力的不同分为6组，男性和女性均分为较小肌力组、中等肌力组和较大肌力组，每组30名。采用国产PH—A型平衡功能检测系统为受试者进行睁眼和闭眼状态下，双脚站立时的静态姿势稳定性的评定，取摆幅指数、外周面积、矩形面积、动摇轨迹长、单位面积轨迹长进行分析。结果 较小肌力组在睁眼和闭眼状态下，左右摆幅指数、前后摆幅指数、外周面积、矩形面积、单位面积轨迹长与另两组相比，差异有统计学意义（P＜0．05或P＜0．01），中等肌力组与较大肌力组的各项平衡功能指标差异无统计学意义（P＞0．05）。结论 下肢伸膝肌力会影响平衡功能，肌力较差者平衡功能也较差。

The effects of lower limb strength on balance

Objective To study the effect of lower limb muscle strength on balance.Methods One hun- dred eighty elderly subjects were divided into six groups by sex and muscle strength level.There were low,moderate and high muscle strength groups for males and females.The static standing balance of these subjects was performed u- sing a PH-A computerized stabilometer with their eyes open and closed.Sway index,covered area,rectangle-area, length and length/area of the destabilizing locui were assessed.Results When standing with the eyes either open or closed,sagittal and lateral sway index,covered area and rectangle-area were significantly larger in the lowest mus- cle strength groups when compared with the others.Length/area was also significantly less.There was no significant difference between the moderate muscle strength group and the highest strength group.Conclusion Lower limb strength affects balance.