Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Correlation between Box Size and Fatigue of the Back Muscles During Lifting Action

들어올리기 동작에서 상자크기와 척추근의 상관관계

  • Koo H. R. (Dept. of Biomechatronic Engineering, Faculty of Life Science & Technology, Sungkyunkwan University) ;
  • Lee S. S. (Dept. of Biomechatronic Engineering, Faculty of Life Science & Technology, Sungkyunkwan University) ;
  • Mun J. H. (Dept. of Biomechatronic Engineering, Faculty of Life Science & Technology, Sungkyunkwan University)
  • Published : 2004.12.01
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Abstract

This study examined the muscle fatigue of the erector spinae according to box size during lifting activity. Ten healthy adult man participated in the experiment for lifting the boxes 10 times with 0.2 lift/s frequency. Bilateral surface EMG (Electomyogtamphy) recordings were made regarding M. (Muscle) Longissimus, M. Iliocostal and M, Multifidus activity throughout lifting working. The median frequency in back muscle fatigue was investigated using power spectral analysis of surface EMG. When the box larger than shoulder width was lifted, the muscle fatigue of M, Multifidus was shown larger than one of the other muscles. Accordingly, the result far M. Multifidus can be applied in optimizing design parameter of box. Also, the standard of box width for box makers have to be below about 420 mm, being average shoulder width of adult male.

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