| 划船运动员静力及动力性肌肉运动疲劳时肌氧含量的变化特征及对EMG参数的影响 |
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| 引用本文： | 张立,宋高晴.划船运动员静力及动力性肌肉运动疲劳时肌氧含量的变化特征及对EMG参数的影响[J].体育科学,2006,26(3):53-57. |
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| 作者姓名： | 张立 宋高晴 |
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| 作者单位： | 1. 武汉体育学院,运动生理生化教研室,湖北,武汉,430071
2. 郑州大学,体育学院,运动人体科学教研室,河南,郑州,450044 |
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| 基金项目： | 湖北省教育厅自然科学基金 |
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| 摘 要： | 研究目的：1）研究静力和动力性肌肉运动疲劳时肌肉氧含量的变化特点厦其规律；2）了解静力性、动力性递增强度运动时EMG参数变化；3）探讨肌氧含量与EMG参数变化之间的关系，为肌肉疲劳时影响肌电肌氧机制提供可能的理论基础。研究方法：1）肌氧含量的测试：探头纵向旋转让光源和检测器的轴线平行于股外侧肌外侧头大腿测定运动时肌氧含量的变化；2）肌电的测试：采用表面肌电图的测量，得出表面电图各指标参数；3）静力负荷等长收缩：通过力量传感器测出其最大肌肉收缩所对应的MVC；4）动力性负荷运动：采取功率自行车逐级递增负荷的测试方法作为肌肉的动力性运动，同步记录EMG参数，并在每一级负荷朱30S采血测定血乳酸浓度。结论：静力性运动时E／T值大幅度增大的时间大多出现在肌氧停止下降之后，肌氧的降低程度与肌肉疲劳程度有关。动力性运动时血乳酸值随负荷而增加，IEMG的变化趋势与血乳酸相似，IEMG、Oxy-Hb、BI值三者呈非常显著性相关，表明肌肉疲劳时肌肉氧供和内环境的改变也是影响EMG信号的重要因素。
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| 关 键 词： | 赛艇 肌肉 氧含量 EMG信号 疲劳 影响 |
| 文章编号： | 1000-677X（2006）03-0053-05 |
| 收稿时间： | 2005-09-21 |
| 修稿时间： | 2005-09-212006-01-16 |
Characteristics of Oxy-Hb Changes and Its Influence to EMG Parameters of Fatigue Muscle during Isotonic and Isometric Exercise of Rowers |
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| ZHANG Li,SONG Gao-qing.Characteristics of Oxy-Hb Changes and Its Influence to EMG Parameters of Fatigue Muscle during Isotonic and Isometric Exercise of Rowers[J].China Sport Science,2006,26(3):53-57. |
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| Authors: | ZHANG Li SONG Gao-qing |
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| Institution: | 1.Wuhan Institute of Physical Education, Wuhan 430071, China; 2. Zhengzhou University, Zhengzhou 450044 ,China. |
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| Abstract: | Objective:to investigate the concentration changes of Oxy-Hb of fatigue muscle during isotonic and isometric exercise,observe the changes of EMG parameters both in isotonic and isometric exercise,studies the relation among IEMG,Oxy-Hb and Bl variables.Methods:1) measurement is made with a continuous-light source dual-wavelength spectrometer for Oxy-Hb on lateral quadriceps.2) sEMG measurement is performed for EMG parameters.3) Isotonic exercise is measured by torque transducer.4) Cycle-ergometer is utilized for isometric exercise.Conclusion:The increasing of E/T ratio occurred after Oxy-Hb dissociation decrease during the isotonic exercise and BL increasing during isometric exercise demonstrates that the change of Oxy-Hb dissociation may play an important role in affecting EMG parameters of muscle fatigue and internal environment of the body. |
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| Keywords: | muscle oxygen content EMG Signal fatigue |
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