대한산업공학회지 (Journal of Korean Institute of Industrial Engineers)

  • 제33권1호
  • /
  • Pages.44-51
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  • 2007
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  • 1225-0988(pISSN)
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  • 2234-6457(eISSN)
대한산업공학회 (Korean Institute of Industrial Engineers)
권호 표지

작업 중 여유시간 변화에 따른 몸통 근육 누적 피로도

The Cumulative Trunk Muscle Fatigue Depending on The Length of Recovery Time

  • 신현주 (한양대학교 산업공학과 인체공학연구센타) ;
  • 김정룡 (한양대학교 산업공학과 인체공학연구센타)
  • Shin, Hyun-Joo (Ergomechanics Lab, Department of Industrial Engineering, Hanyang University) ;
  • Kim, Jung-Yong (Ergomechanics Lab, Department of Industrial Engineering, Hanyang University)
  • 발행 : 2007.03.31
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초록

The purpose of this study was to identify the relationship between the cumulative fatigue of trunk muscles andthe period of recovery time during repetitive lifting and lowering tasks with symmetric and asymmetric postures.Ten subjects participated in the experiment. Subjects had 1, 2, 3, 4 and 5 minutes recovery time respectivelywhile they were performing the lifting and lowering task repeatedly for 3 minutes with the weight equivalent to25% level of MVC. EMG signals from ten trunk muscles were collected and the fatigue level was analyzedquantitatively. In results, the local muscle fatigue was no longer accumulated when 5 minutes recovery time wasgiven in symmetric position. For asymmetric position, it took longer minutes to prevent the fatigue accumul-ation. Different trunk muscles indicated slightly different recovery patterns in terms of MPF (Mean Powerfrequency) value.This result would help ergonomist design the length of recovery time to control the cumulative fatigue of trunkmuscles in industry with repetitive lifting and lowering task.

키워드

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