摘要
目的:观察骨骼肌不同表层温度对其表面肌电信号的影响,对深入了解人体运动时,尤其运动疲劳时表面肌电信号的变化机制具有重要意义。方法:以11名男性大学生为研究对象,使用热理疗仪加热、冰敷、室温三种不同方法使其左侧肱二头肌表层肌肉在不同温度下进行等长收缩,运用ME6000表面肌电仪采集左臂肱二头肌的表面肌电信号,对时域指标、积分肌电、均方根振幅、频域指标平均功率频率和中位频率进行分析。结果:在时域指标RMS、IEMG在表层平均温度16℃时幅值要比平均35℃、42℃显著升高(P<0.01),而频域指标MF、MPF幅值在16℃时比35℃、42℃显著降低(P<0.01)。结论:随着皮肤表层温度的降低,时域指标IEMG和RMS呈显著上升趋势,而频域指标MPF和MF呈显著下降趋势,可见,骨骼肌温度对肌电的时域和频域指标有影响,这可能会影响到肌肉疲劳对表面肌电信号影响的判断。
Objective:Observing the effect of different surface temperatures of skeletal muscles on the surface EMG signals is of great significance for understanding the mechanism of changes in surface EMG signals during human exercise,especially exercise fatigue.Methods:Taking 11 male college students were used to make the surface muscle of the left biceps brachii muscle contract at different temperatures by three different methods:heating,ice compress and room temperature,use the ME6000 surface electromyograph to collect the surface EMG signal of the left arm biceps.For time domain indicators,integrated electromyography(IEMG),root mean square amplitude(RMS),frequency domain indicators mean power frequency(MPF)and median frequency(MF)For analysis.Results:The amplitude of the time domain indicators RMS and IEMG at the surface temperature of 16℃is significantly higher than the average of 35℃and 42℃(P<0.01),while the amplitude of the frequency domain indicators MF and MPF at 16℃is higher than 35℃,Significantly decreased at 42℃(P<0.01).Conclusion:As the skin surface temperature decreases,the time domain indicators IEMG and RMS show a significant upward trend,while the frequency domain indicators MPF and MF show a significant downward trend.It can be seen that the skeletal muscle temperature has an effect on the time and frequency domain indicators of myoelectricity May affect the judgment of muscle fatigue on the surface EMG signal.
作者
张天宇
林腾飞
ZHANG Tianyu;LIN Tengfei(Shenyang Sport University,Shenyang 110102,Liaoning,China)
出处
《辽宁体育科技》
2020年第2期48-52,共5页
Liaoning Sport Science and Technology
