대한인간공학회지 (Journal of the Ergonomics Society of Korea)

  • 제25권2호
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  • Pages.197-204
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  • 2006
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  • 1229-1684(pISSN)
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  • 2093-8462(eISSN)
대한인간공학회 (Ergonomics Society of Korea)
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들기/내리기 빈도와 회복시간 변화에 따른 몸통 근육의 피로도 분석

Analysis of Trunk Muscle Fatigue as the Frequency of Lifting/Lowering and Recovery Time Change

  • 발행 : 2006.05.31
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초록

The purpose of this study was to investigate the relationship between the cumulative fatigue of trunk muscles and the period of recovery time during repetitive lifting and lowering task with two different frequencies(4 times/min and 6 times/ min). Eight healthy males with no prior history of LBD(low back disorders) volunteered for this study. Subjects had 2, 3, 4, and 5 minutes recovery time respectively while they were preforming the lifting and lowering task at 15% level of MVC. EMG signals from six trunk muscles were collected and the fatigue level was analyzed quantitatively. In results, the fatigue levels of LES(left elector spinae), RLD(right lattissimus dorsi), LLD(left lattissimus dorsi), RRA(right rectus abdominis) and LRA(left rectus abdominis) were recovered when 3 minutes recovery time was given at 4 times/min frequency. However, the fatgue level of RES(right elector spinae) was recovered when 4 minutes recovery was given. On the other hand, when 6 times/min frequency was used, the RLD, LLD, RRA and LRA were recovered at 5 minutes of recovery time. But for RES and LES, it took longer than 5 minutes to be recovered. This results can be applied to design the adequate length of recovery time to control the cumulative fatigue of trunk muscles in industry with repetitive lifting and lowering task.

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피인용 문헌

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  2. Effects of low-frequency electrical stimulation on cumulative fatigue and muscle tone of the erector spinae vol.27, pp.1, 2015, https://doi.org/10.1589/jpts.27.105
  3. Ergonomics' Role for Preventing Musculoskeletal Disorders vol.29, pp.4, 2010, https://doi.org/10.5143/JESK.2010.29.4.393
  4. Biomechanical Evaluation of the Neck and Shoulder When Using Pillows with Various Inner Materials vol.30, pp.2, 2011, https://doi.org/10.5143/JESK.2011.30.2.339