【摘要】 通过高速摄影、表面肌电图(sEMG)测量以及等速肌力测试等方法对12名体育专业男生进行研究,获取踝关节主要屈伸肌(胫骨前肌和腓肠肌)等速肌力与sEMG之间的关系,以此说明用sEMG来直接评价肌肉用力情况时需进行标准化的必要性及最佳标准化方式。结果表明:相同肌肉收缩过程中,肌力矩值与平均振幅(MA)的变化趋势呈现高度相关,相关系数r在0.6以上;不同收缩形式、不同收缩速度下,均方根振幅(RMS)、积分肌电(iEMG)值会随着收缩速度的增加而减小;跳深动作下肢肌肉sEMG标准化后的值与跳深腾起速度之间均有一定的相关性,标准化后以最大随意等长收缩(MVIC)的标准化值与跳深腾起速度的相关性最高。更多还原

【Abstract】 Twelve professional sportsmen were studied to obtain the relationship between sEMG and isokinetic muscle strength of the major flexors and extensors of ankle joint(tibialis anterior and gastrocnemius) through high-speed photography, surface electromyography(sEMG) measurement, and isokinetic strength test. The purpose was to explain the need for standardization and the best standardization method for sEMG to directly evaluate muscle strength. The results showed that during the same muscle contraction, the muscle torque value is highly correlated with the mean amplitude(MA), and the correlation coefficient is above 0.6. The root mean square amplitude(RMS) and integrated electromyogram(iEMG) values decrease with increasing contraction speed under different contraction modes and contraction speeds. There is a certain correlation between the standardized value of the sEMG of the lower limb muscles and the jumping speed under deep jumping movement with the correlation being highest between the maximal voluntary isometric contraction(MVIC) and the jumping speed.更多还原