| 等长负荷诱发腰部脊竖肌疲劳时sEMG的变化 |
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| 引用本文： | 王健.等长负荷诱发腰部脊竖肌疲劳时sEMG的变化[J].中国体育科技,2000,36(12):17-18. |
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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,体育系,浙江,杭州,310028 |
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| 摘 要： | 本研究探讨了等长负荷诱发腰部脊竖肌疲劳过程中 s EMG信号的时、频指标变化规律和特点。研究发现 :时域指标在肌肉疲劳过程变化的特异性较差 ,而频域指标的特异性较好 ,且其时间序列曲线的斜率与等长负荷持续时间呈明显统计相关。研究结果表明 ,s EMG频域指标时间序列曲线的斜率是评价腰部脊竖肌功能的较好指标
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| 关 键 词： | 等长负荷 脊竖肌 疲劳 表面肌电图 时频分析 |
| 修稿时间： | 2000-03-22 |
sEMG Median and Mean Frequency Changes during Isometric Contraction of Back Extensors to Fatigue |
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| WANG Jian.sEMG Median and Mean Frequency Changes during Isometric Contraction of Back Extensors to Fatigue[J].China Sport Science and Technology,2000,36(12):17-18. |
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| Authors: | WANG Jian |
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| Abstract: | The purpose of this study was to examine the shift characteristics of sEMG signal and to identify some sEMG predictors of muscle functional level. All subjects performed muscle isometric loading test. The results showed that 1) both rate of MF and MPF decline showed a linear type decrease; 2) both MF, MPF decline rate have a significant correlation to endurance time. In conclusion, MF and MPF decline rate used in present study were a reliable noninvasive predictor of muscle functional level. |
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| Keywords: | isometric load extensor fatigue sEMG spectrum shift characteristics |
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