递增静力性收缩中肌氧拐点与肌电活动、心率变化之间的联系  被引量:1

Relationships between Breakpoints of Muscle Oxygenation and Muscular Neuro-electrical Activity,Heart Rate Changes during Incremental Isometric Contractions

在线阅读下载全文

作  者:王帮德[1,2] 田庆平[1,2] 孙金燕[1,2] 孙白雷[1,2] 徐国栋[3,4] 张立[3] 骆清铭[1,2] 龚辉[1,2] 

机构地区:[1]华中科技大学武汉光电国家实验室(筹)Britton Chance生物医学光子学研究中心,湖北武汉430074 [2]华中科技大学生命科学与技术学院生物医学光子学教育部重点实验室,湖北武汉430074 [3]武汉体育学院健康科学学院,湖北武汉430079 [4]江汉大学体育学院,湖北武汉430056

出  处:《天津体育学院学报》2012年第4期282-286,共5页Journal of Tianjin University of Sport

基  金:国家自然科学基金委员会创新研究群体科学基金(项目编号:61121004);教育部“长江学者与创新团队发展计划”

摘  要: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OI、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(P>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。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.

关 键 词: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 

分 类 号:G804.21[文化科学—运动人体科学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象