膝关节屈伸肌力比对平衡能力的影响研究

On Effect of Ratio of Flexor and Extensor on Balance Control of Knee Joint

为探讨膝关节屈伸肌力比对人体平衡能力的影响,选取北京体育大学运动康复系无运动训练经验的60名学生作为研究对象,对其膝关节在高、中、低3种测试速度模式下的屈伸肌力及动、静态平衡能力进行测试.实验结果表明:膝关节屈伸肌力比值随着运动速度的增大而增大,动态与静态平衡能力随着膝关节屈伸肌力比的增大而增强,且超过一定的比值后趋于稳定(低速测试下动态平衡能力随着膝关节屈伸肌力比值的增大先增强后降低).在静态下,人体纵向平衡能力优于横向,在动态下,人体横向平衡能力优于纵向.膝关节屈伸肌力比应达到群体中等以上水平时较为适宜.

In order to investigate the effect of knee flexion and extension muscle strength on the balance ability of the human body,60 students with no sports training experience in the Sports Rehabilitation Department of Beijing Sport University have been selected as the research object in this paper,and the knee joints in the high,medium and low test speed modes.The flexor and extensor muscle strength and dynamic and static balance ability have been tested.The experimental results show that the knee flexion and extension muscle strength ratio increases with the increase of the movement speed.The dynamic and static balance ability increases with the increase of knee flexor and extension muscle strength ratio,and tends to be stable after a certain ratio(the dynamic balance ability under low speed test increases first and then decreases with the increase of knee flexion and extension muscle strength ratio).Under static conditions,the human body's longitudinal balance ability is better than the horizontal direction.Under dynamic conditions,the human body's lateral balance ability is superior to the vertical direction.It is more appropriate for the knee flexion and extensor muscle strength ratio to reach the middle and upper levels of the group.