天津体育学院学报
天津體育學院學報
천진체육학원학보
Journal of Tianjin Institute of Physical Education
2012年
4期
282~286
,共null页
王帮德 田庆平 孙金燕 孙白雷 徐国栋 张立 骆清铭 龚辉
王幫德 田慶平 孫金燕 孫白雷 徐國棟 張立 駱清銘 龔輝
왕방덕 전경평 손금연 손백뢰 서국동 장립 락청명 공휘
近红外光谱术 表面肌电图 生理拐点 股外侧肌 递增等长收缩 肌氧 心率
近紅外光譜術 錶麵肌電圖 生理枴點 股外側肌 遞增等長收縮 肌氧 心率
근홍외광보술 표면기전도 생리괴점 고외측기 체증등장수축 기양 심솔
near infrared spectroscopy; surface electromyography; local physiological thresholds; vastus lateralis, incremental isometric contractions; muscle oxygenation; heart rate
目的:研究递增静力性收缩中,反映局部肌肉氧供平衡被打破的肌氧拐点(阈)的存在性及肌氧变化与肌电活动变化、心率变化之间的联系。方法:对递增等长伸膝运动中股外侧肌处近红外肌氧、表面肌电变化及心率变化过程进行监测和分析。结果:递增等长伸膝运动中肌氧氧指标(OI)变化过程存在拐点现象,并且0I、肌电均方根值(sEMGrms)、心率(HR)3种生理参数之间呈现显著相关性(r2〉0.951,P〈0.001)。另外,sEMGrms及HR的上升变化过程也存在拐点现象,而且肌氧拐点(OIBp,46.4±2.1(SE)%MVC)、肌电拐点(EMGBp,50.8±1.9%MVC)和心率拐点(HRBp)三者之间没有显著差别(伶0.05)。结论:递增静力性收缩运动中也存在肌氧拐点现象,而且肌氧拐点的出现与肌电幅值及心率的急剧增加密切相关。
目的:研究遞增靜力性收縮中,反映跼部肌肉氧供平衡被打破的肌氧枴點(閾)的存在性及肌氧變化與肌電活動變化、心率變化之間的聯繫。方法:對遞增等長伸膝運動中股外側肌處近紅外肌氧、錶麵肌電變化及心率變化過程進行鑑測和分析。結果:遞增等長伸膝運動中肌氧氧指標(OI)變化過程存在枴點現象,併且0I、肌電均方根值(sEMGrms)、心率(HR)3種生理參數之間呈現顯著相關性(r2〉0.951,P〈0.001)。另外,sEMGrms及HR的上升變化過程也存在枴點現象,而且肌氧枴點(OIBp,46.4±2.1(SE)%MVC)、肌電枴點(EMGBp,50.8±1.9%MVC)和心率枴點(HRBp)三者之間沒有顯著差彆(伶0.05)。結論:遞增靜力性收縮運動中也存在肌氧枴點現象,而且肌氧枴點的齣現與肌電幅值及心率的急劇增加密切相關。
목적:연구체증정력성수축중,반영국부기육양공평형피타파적기양괴점(역)적존재성급기양변화여기전활동변화、심솔변화지간적련계。방법:대체증등장신슬운동중고외측기처근홍외기양、표면기전변화급심솔변화과정진행감측화분석。결과:체증등장신슬운동중기양양지표(OI)변화과정존재괴점현상,병차0I、기전균방근치(sEMGrms)、심솔(HR)3충생리삼수지간정현현저상관성(r2〉0.951,P〈0.001)。령외,sEMGrms급HR적상승변화과정야존재괴점현상,이차기양괴점(OIBp,46.4±2.1(SE)%MVC)、기전괴점(EMGBp,50.8±1.9%MVC)화심솔괴점(HRBp)삼자지간몰유현저차별(령0.05)。결론:체증정력성수축운동중야존재기양괴점현상,이차기양괴점적출현여기전폭치급심솔적급극증가밀절상관。
Objective: To study (1) the existence of breakpoints (Bp) in muscle oxygenation (an indicator of the breaking up of the balance between muscle oxygen supply and consumption); (2) the relationship between muscle oxygenation and muscular neuro-electrical activity, heart rate during incremental isometric knee extensions. Methods: The muscle oxygenation by near infrared spectroscopy (NIRS) and neuro-electrical activity by surface electromyo- graphy (sEMG) in vastus lateralis, and the heart rate(HR) were monitored and analyzed comprehensively. Results: There were significant correlations among muscle oxygenation index (OI), root mean square of sEMG signal(sEMGmas), and heart rate (r2〉0.951 ,P〈0.001); There were Bp in the trends of muscle oxygenation index, sEMGrms, HR changes, and no significant difference among the Bp of muscle OI (OIBp, 46.4±2.1 (SE) %MVC ), Bp of sEMGrms (EMGBp, 50.8±1.9 %MVC) and Bp of HR (HRBp) (/9〉0.05). Conclusion: There are Bp of muscle oxygenation changes during incremental isometric contractions, and the OIBp is associated with the significant increase in sEMGrms and HR.