中频电刺激对膝关节肌群等速肌力相关指标影响的实验研究

目的：探讨中频电刺激疗法对人体膝关节等速肌肉力量相关指标的影响。方法：将12名健康男青年随机分为对照组6人、中频电刺激干预组6人,干预组进行一个疗程中频电刺激。分别于实验前、后使用等速肌力测试仪测试受试者右侧膝关节肌群肌力相关指标,测试强度定为以下两组：角速度60°/s重复运动5次组和角速度180°/s重复运动15次组。结果：（1）与实验前相比,干预组角速度为60°/s时,膝关节屈、伸肌群相对平均峰力矩APT%BW显著升高（P〈0.05）,相对平均功率AP%BW明显增加（P〈0.01）;（2）干预组角速度为180°/s时,实验前后伸、屈肌群疲劳指数均FI减小且有统计学意义（P〈0.05）;（3）实验前、后干预组屈、伸肌群峰力矩角度变化均无显著性差异（P〉0.05）;（4）与实验前相比,对照组各项测试指标变化均无显著性差异。结论：中频电刺激疗法对提高人体膝关节肌群相对平均峰力矩、相对平均功率和降低疲劳指数有明显的效果,对提高膝关节肌群爆发力和耐力起到一定的作用。

The Influence of Medium Frequency Electric Stimulation to Related Targets of Knee Joint Isokinetic Muscle Strength

Aim：To explore the influence of medium frequency electric stimulation to related targets of knee joint isokinetic muscle strength.Metheds：Randomly separate 12 healthy young students from College of Physical Education and Sports Science of Fujian Normal University into two groups,control group（6cases）and intervention group（6cases）.Intervention group takes a cure of medium frequency electric stimulation.Test related targets of right knee joint isokinetic muscle strength before and after the experiment.The exercise intensy set as following two ：repeat motion 5 times,angular velocity 60°/s group and repeat motion 15 times,angular velocity 180°/s group.Result：（1） Compared with that before experiment,as the angular velocity of intervention group is 60°/s,APT%BW and AP%BW of flexors and extensors muscle of knee joint are increased significantly（P0.05）;（2）As the angular velocity of intervention group is 180°/s,FI of flexors and extensors muscle is decreased significantly（P0.05）;（3） The changes of JAPT have no significant differents（P0.05）.（4） Compared with that before experiment,all targets of control group have no significant differents.Conclutions：Medium frequency electric stimulation have significant effects on the improvement of APT%BW and AP%BW and the decreased of FI,it is useful to improve explosive power and endurence of knee joint muscles group.