| 动态运动诱发腰部脊竖肌疲劳过程中sEMG信号变化特征 |
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| 引用本文： | 王健.动态运动诱发腰部脊竖肌疲劳过程中sEMG信号变化特征[J].中国体育科技,2001,37(4):9-11. |
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| 作者姓名： | 王健 |
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| 作者单位： | 浙江大学 教育学院 体育学系,浙江大学应用心理研究所, |
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| 摘 要： | 本研究的目的在于观察动态运动诱发腰部脊竖肌疲劳过程中sEMG信号线性分析指标MPF和非线性分析指标Lempel-Ziv复杂度和近似熵的动态变化规律，确定能够较好地运用于脊竖肌功能评价的sEMG指标。研究结果表明，动态运动过程中，腰部脊竖肌sEMG信号的MPF和Lempel-Ziv复杂度均呈明显的线性规律下降；70%的受试者的近似熵呈先升后降型变化;以MPF下降来预测腰部脊竖肌功能水平的外部效度优于Lempel-Ziv复杂度。研究结果提示，sEMG信号的上述变化可能是神经肌肉系统自组织调节活动的表现。
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| 关 键 词： | 脊竖肌 肌电信号 功率谱分析 非线性分析 等张收缩 疲劳 特征 |
| 文章编号： | 1002-9826（2001）04-0009-03 |
| 修稿时间： | 2000年10月31 |
sEMG Signal Change Characteristics of Lumbar Paraspinal Muscle during Dynamic Voluntary Contractions |
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| WANG Jian.sEMG Signal Change Characteristics of Lumbar Paraspinal Muscle during Dynamic Voluntary Contractions[J].China Sport Science and Technology,2001,37(4):9-11. |
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| Authors: | WANG Jian |
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| Abstract: | The purpose of this study is to determine the sEMG signal power spectral and nonlinear characteristics of lumbar paraspinal muscle during dynamic voluntary contractions and to select a more effective sEMG indices for muscle functional level prediction. The result shows that both decline in MPF and Lempei-Ziv complexity serial curve show a linear type decrease. Approximate entropy of 70% subjects shows down type change. Both slopes of MPF and Lempel-Ziv complexity serial curve have a significant correlation to trail number, but the former is better. The result shows that the nature of sEMG signal changes during dynamic voluntary contractions may be the results of self-organization of neuron-muscle system. |
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| Keywords: | lumbar paraspinal sEMG signal power spectrum nonlinear analysis isotonic contraction fatigue characteristics |
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