The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Influence of Aging on Surface EMG Signals Generated Under Sustained Fixed Load Contraction

고정 부하 수축시 기록한 표면근전도 신호에 대한 노화의 영향

  • 이진 (강원대학교 삼척캠퍼스 제어계측공학과) ;
  • 김성환 (서울시립대학교 전자전기컴퓨터공학부)
  • Received : 2010.04.22
  • Accepted : 2010.06.25
  • Published : 2010.08.01
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Abstract

The present study was performed to investigate the effect of aging on muscular activity of older subjects under the condition of fixed load muscle contraction. SEMG signals were recorded from old (46 women) and young (45 women) groups performing sustained isometric elbow flexion contraction with a fixed load during 30 seconds. Linear regression and mean square error (MSE) analysis with four characteristic variables (ARV, RMS, MDF, MNF) were used to compare the age-related difference (of local muscle fatigue and fluctuation of the amplitude and frequency) in the SEMG signal. The main results can be summarized as follows: During sustained muscle contraction with a fixed load: i) the MSE values of amplitude (ARV, RMS) and frequency (MDF, MNF) variables were more than 30% higher for the young than for the old adults; ii) the measures of local muscle fatigue (slope of the MDF and MNF) indicated greater fatigue in the old; and iii) the rate of increase of the SEMG amplitude was higher for the young than the old.

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References

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