Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Relationship between Endurance Times and Frequency Parameters in Surface EMG during Isotonic Contraction Exercises

등장성 수축운동시 표피근전도의 주파수파라미터와 근지구력시간과의 상관성

  • Lee, Sangsik (Department of Biomedical Engineering, Kwandong University) ;
  • Go, Jaewook (Department of Social Welfare, Kwandong University) ;
  • Jang, Jeehun (Department of Sports & Leisure, Kwandong University) ;
  • Park, Wonyeop (Department of Mechanical Engineering, Hankyung University) ;
  • Lee, Kiyoung (Department of Biomedical Engineering, Kwandong University)
  • Received : 2012.06.26
  • Accepted : 2012.08.07
  • Published : 2012.09.30
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Abstract

Previous investigators have shown that the frequency compression is related to the muscle fatigue and the decreasing conduction velocity of muscle fibers. The aim of the present study was to investigate the relationship between endurance times and frequency parameters such as mean power frequency and median frequency in the surface EMG signal during isotonic contractions. Eight healthy subjects performed voluntary isotonic contractions of biceps Brachii muscle until their endurance times which were determined when the subject could no longer follow the contraction cycle. The regressive slopes of mean power frequency and median frequency were used to describe the frequency compression of the surface EMG signal, and to test the predictability of endurance time. As results of experiment, significant correlations were found between endurance time and the regressive slopes of mean power frequency and mean frequency computed over 50%Tend of endurance time.

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References

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