原创《慢性踝关节不稳定患者踝关节肌力变化特征》：这是一篇与肌力论文范文相关的免费优秀学术论文范文资料,为你的论文写作提供参考。
摘 要：目的：探讨慢性踝关节不稳患者的外翻肌/内翻肌和背屈肌/跖屈肌离心峰值力矩比值是否发生变化.方法：选取24名慢性踝关节不稳受试者作为实验组,同时选取24名年龄、身高、体重、性别和身体活动水平和实验组相匹配的受试者作为对照组.运用等速测力系统,对两组受试者右侧踝关节外翻肌、内翻肌、背屈肌和跖屈肌在不同角速度下（60°/s和120°/s）离心收缩的峰值力矩进行测量,并计算出外翻/内翻和背屈/跖屈离心峰值力矩的比值.结果：在角速度为60°/s和120°/s下,实验组的外翻、内翻和跖屈峰值力矩明显低于对照组（P<0.05）,而背屈离心峰值力矩无显著差异（P>0.05）；此外,实验组的外翻/内翻离心峰值力矩比值明显低于对照组（P<0.05）,而实验组的背屈/跖屈离心峰值力矩比值显著高于对照组（P<0.05）.结论：在角速度为60°/s和120°/s下,慢性踝关节不稳患者的外翻/内翻离心峰值力矩比值显著降低,而背屈/跖屈離心峰值力矩比值显著增加,其机制可能是慢性踝关节不稳患者的外翻、内翻和跖屈的离心峰值力矩下降所致.所以,外翻肌、内翻肌和跖屈肌的离心肌力减弱可能会导致踝关节外侧韧带的重复性损伤.
关键词：离心收缩；慢性踝关节不稳；踝关节肌肉力量；等速肌力
中图分类号：G804.53；G804.66文献标识码：A文章编号：1006-2076（2017）04-0053-05
Abstract： Objective： To investigate if the ratios of eccentric peak torque of evertor/invertor and dorsiflexor/plantar-flexor are altered in subjects with chronic ankle instability. Methods： 24 chronic ankle instability subjects as an experimental group, and 24 healthy subjects as a control group, were matched in age, height, weight, gender, and activity level. The eccentric peak torque of right ankle evertor, invertor, dorsiflexor, plantar-flexor muscles of the two groups were measured with isokinetic dynamometer at angular velocities 60 deg/s and 120 deg/s, and the ratios of eccentric peak torque of evertor/invertor and dorsiflexor/plantar-flexor were calculated. Results： The eccentric peak torque of eversion, inversion and plantarflexion of experimental group were significantly lower than control group （P<0.05） and no significant differences in eccentric peak torque of dorsiflexion （P>0.05）. Moreover, the ratios of eccentric peak torque of eversion/inversion of experimental group was significantly lower than control group （P<0.05） and the ratios of eccentric peak torque of dorsiflexion/plantarflexion of experimental group was significantly higher than control group （P<0.05）. Conclusion： The ratios of eccentric peak torque of eversion/inversion of patient with chronic ankle instability significantly decreases and the ratios of eccentric peak torque of dorsiflexion/plantarflexion significantly increases at angular velocities 60 deg/s and 120 deg/s. The mechanism may be that eccentric peak torques of eversion, inversion and plantarflexion of patient with chronic ankle instability decrease. So, eccentric strength weakness of evertor, invertor, and plantar-flexor could lead to repeated injury of lateral ligament of the ankle.
Key words：eccentric contraction； chronic ankle instability； muscle strength of ankle joint； isokinetic strength
慢性踝关节不稳常用于描述踝关节外侧不稳定的发生率[1],是运动过程中常见的损伤,约占所有运动损伤的10%～15%[2].踝关节不稳定的慢性症状会限制普通人的日常活动,也会对运动员的运动能力产生一定的影响.踝关节依靠周围的肌群共同收缩维持关节的动态稳定性,在一些下肢活动过程中,如走、跑和跳,运动员依靠肌肉的共同收缩,尤其是离心收缩来控制足和地面之间的作用力[3].对于踝关节肌力不平衡的人群来说,肌肉共同收缩能力可能会受到影响,进而肌肉不能以协调的方式消除外来的作用力,这些过度的应力会作用在关节周围的组织上,极易导致踝关节损伤[4].
肌力论文参考资料：
结论：慢性踝关节不稳定患者踝关节肌力变化特征为关于本文可作为肌力方面的大学硕士与本科毕业论文肌力和肌张力的区别论文开题报告范文和职称论文论文写作参考文献下载。
