间断递增负荷条件下肌肉活动的力-电关系  

The Relationship between sEMG Parameters and Force Levels during Step Contraction of Biceps Brachii

作　　者：宋超[1] 王健[2] 方红光[2] 

机构地区：[1]浙江理工大学心理学研究所,浙江杭州310018 [2]浙江大学,浙江杭州310028

出　　处：《体育科学》2006年第3期50-52,共3页China Sport Science

基　　金：国家自然科学基金资助项目(30170447);中-芬政府间科学技术合作项目(AM10:21)

摘　　要：目的:探讨非疲劳状态下肱二头肌在静态间断性递增负荷下sEMG信号的线性和非线性指标变化规律;方法:记录19名被试肱二头肌在10%、20%、40%、60%、80%MVC负荷水平下sEMG信号,分析线性时、频指标AEMG、MPF、MF和非线性指标C(N)、DET%的变化规律;研究结果:在负荷水平从10%上升到80%MVC过程中,线性分析指标AEMG、MPF和MF均呈单调递增性改变。非线性分析指标DET%呈单调递减性改变,C(N)基本保持稳定;结论:以上sEMG信号变化的原因可能与递增负荷运动过程中型肌纤维募集比例和数量的增加有关。Objective This paper studied the linear and nonlinear sEMG signal changes of biceps brachii in different load level during non- fatigue contraction state. Method 19 subjects participated in the experiment, sEMG signals were recorded at different force level to analyze its changes of linear indices AEMG,MPF, MF and non linear indices C （N） ,DET %. Result All the linear indices increased and nonlinear index DET% decreased monotonously while C（N） kept stable during muscle contraction from 10%MVC to 80%MVC level. Conclusion The change of sEMG parameters during different levels in non-fatigue contraction may be related to the type Ⅱ fibres recruitment.

关 键 词：非疲劳状态 肱二头肌 间断递增负荷 SEMG 

分 类 号：G804.8[文化科学—运动人体科学]