CAJ | 학술논문

为了了解sEMG信号在运动谤发的疲劳恢复期内的规律，本研究以肱二头肌持续最大收缩至肌力下降到初始值的50％以厦恢复期120秒内不同时刻获得的sEMG信号为研究对象，采用线性和非线性分析方法（FFT和RQA）计算出AEMG、MF和Determ％这些指标以厦肌力（MVC）的变化情况。结果发现，在等长收缩过程中，AEMG迅速增加然后呈线性递减，MF从收缩的一开始一直呈现出线性下降的变化模式，而Determ％除了第1个值显著大于第2个外，其余表现出线性递增的变化模式。在恢复期内，AEMG的变化没有明显的规律性，MF随着和Determ％均表现出良好的恢复趋势。MF和Determ％为半时恢复期为12．9和5．2秒，显著低于MVC的19．2秒。在恢复期内没有出现在等长收缩过程中的第1段信号的Determ％大于第2段信号的情形。研究提示，sEMG信号可能更主要受CNS对肌肉控制策略的影响，Determ％的变化可能揭示包含肌肉功能状态的生物学信息。
위료료해sEMG신호재운동방발적피로회복기내적규률，본연구이굉이두기지속최대수축지기력하강도초시치적50％이하회복기120초내불동시각획득적sEMG신호위연구대상，채용선성화비선성분석방법（FFT화RQA）계산출AEMG、MF화Determ％저사지표이하기력（MVC）적변화정황。결과발현，재등장수축과정중，AEMG신속증가연후정선성체감，MF종수축적일개시일직정현출선성하강적변화모식，이Determ％제료제1개치현저대우제2개외，기여표현출선성체증적변화모식。재회복기내，AEMG적변화몰유명현적규률성，MF수착화Determ％균표현출량호적회복추세。MF화Determ％위반시회복기위12．9화5．2초，현저저우MVC적19．2초。재회복기내몰유출현재등장수축과정중적제1단신호적Determ％대우제2단신호적정형。연구제시，sEMG신호가능경주요수CNS대기육공제책략적영향，Determ％적변화가능게시포함기육공능상태적생물학신식。
In order to investigate the regularity of SEMG signal in recovery phase after sustained maximal contraction till force decreased less than 50% MVC, this study analyed MVC changes and sEMG signal of BB during contraetion and recovery phase of 120 ,seconds use linear and non- linear methods （FFT and RQA） to get AEMG, MF, Determ%. We founded that AEMG increased rapidly then decreased linearly during contracting phase while MF decreased all the time. Determ% showed a linear increasing trend except that the first value was significantly greater than the second one. But this phenomena were not seen in the recovery phase. In the recovery phase MF and Determ% showed good regularity except AEMG. T1/2 of MF and Determ% were 12.9s and 5.2s respectively and were significantly smaller than 19.2s of MVC. The study suggested that sEMG signal was mainly affected by controlling strategy of CNS, and the changes of Determ% may contain some biological messages of muscle function.