CAJ | 학술논문

对12名男子赛艇运动员采用近红外测定方法探测股外侧肌肌氧含量的变化，用sEMG测量1／3MVC和2／3MVC静力性肌肉收缩时肌电参数。动力性运动采取功率自行车逐级递增负荷同步记录肌氧含量和肌电图EMG参数，并采血测定血乳酸浓度。结果：研究发现1／3MVC、2／3MVC静力性运动时肌氧含量的降低程度与E／T值及放电次数显著增加呈非常显著性相关。动力性运动时积分肌电值（IEMG）增加发生在肌氧含量下降之后，并与BLa值非常显著性相关。结论：肌肉静力性收缩时不管强度大小，肌肉收缩疲劳期IEMG的增加与肌氧含量的下降有关。动力性运动中IEMG的改变可受到血乳酸浓度增加和肌肉氧含量减少两方面因素的影响。
대12명남자새정운동원채용근홍외측정방법탐측고외측기기양함량적변화，용sEMG측량1／3MVC화2／3MVC정력성기육수축시기전삼수。동력성운동채취공솔자행차축급체증부하동보기록기양함량화기전도EMG삼수，병채혈측정혈유산농도。결과：연구발현1／3MVC、2／3MVC정력성운동시기양함량적강저정도여E／T치급방전차수현저증가정비상현저성상관。동력성운동시적분기전치（IEMG）증가발생재기양함량하강지후，병여BLa치비상현저성상관。결론：기육정력성수축시불관강도대소，기육수축피로기IEMG적증가여기양함량적하강유관。동력성운동중IEMG적개변가수도혈유산농도증가화기육양함량감소량방면인소적영향。
NIRS is employed to determine change of lateral femur muscle oxygen content and sEMG is employed to test the muscle electricity indexes 1/3MVC and 2/3MVC static exercises. In dynamic exercises, power bicycles with load gradually increased are used and muscle oxygen content and EMG indexes are simultaneously recorded and BL is tested. Result： the reduction level of muscle oxygen content in 1/3MVC and 2/3MVC static exercises is markedly relevant to the E/T values and the increase of electricity release times. The increase of IEMG in dynamic exercises takes place after the decrease of muscle oxygen content and is markedly relevant to BLa values. Conclusion： Regardless of the intensity of muscle static exercises, the increase in IEMG during the muscle fatigue period is related to the decrease of muscle oxygen content. Change of IEMG in the dynamic exercises can be affected by the increase in BL and decrease of muscle oxygen content.