Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Evaluation of the Effects of Lower-limb Postures on the Subjective Discomfort, Heart Rate and EMGs of Lower Extremity Muscles

하지 자세가 근전도, 심박수 그리고 불편도에 미치는 영향분석

  • Kong, Yong-Ku (Department of Industrial Engineering, Sungkyunkwan University) ;
  • Kim, Dae-Min (Department of Industrial Engineering, Sungkyunkwan University) ;
  • Lee, Soo-Jin (Department of Occupational and Environmental Medicine, Hanyang Uiversity) ;
  • Lee, Jae-Hoon (Department of Occupational and Environmental Medicine, Hanyang Uiversity) ;
  • Lee, Yong-Ho (Department of Occupational and Environmental Medicine, Hanyang Uiversity) ;
  • Lee, Kyung-Suk (Rural Resources Development Institute, Rural Development Administration) ;
  • Sohn, Seong-Tae (Department of Industrial Engineering, Sungkyunkwan University)
  • 공용구 (성균관대학교 산업공학과) ;
  • 김대민 (성균관대학교 산업공학과) ;
  • 이수진 (한양대학교 산업의학교실) ;
  • 이재훈 (한양대학교 산업의학교실) ;
  • 이용호 (한양대학교 산업의학교실) ;
  • 이경숙 (농촌진흥청 농촌자원개발연구소) ;
  • 손성태 (성균관대학교 산업공학과)
  • Published : 2009.02.28
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Abstract

Repetitive movement, inadequate working posture, overuse of force, physical contact with sharp edge, vibration and temperature were well known risk factors of WMSDs (Work-related Musculoskeletal Disorders). Many researchers have investigated the relationship between inadequate working postures and incidences of WMSDs of the upper extremities, whereas relatively few researchers have tried to evaluate workload associated with the lower-body postures. The effects of lower-limb postures including various knee flexion angles on the subjective discomfort, heart rate and EMG of lower-limb muscles were investigated in this study. Thirty graduate students were asked to maintain thirteen different body postures, and heart rate and EMG data of five muscle groups (electro spine, biceps femoris, vastus medialis, gastrocnemius and tibialis anterior) from each posture were collected during fifteen minutes sustaining tasks. All participants were also asked to report their discomfort ratings of body parts. Results showed that high subjective discomfort ratings and heart rates were reported at the postures of knee angles of $60^{\circ}$ and $90^{\circ}$, whereas low discomfort ratings were founded at the postures of chair heights with 20cm, 40cm, and sitting with crossed legged. The change of median frequency for each muscle group during fifteen minutes tasks was investigated for each body posture to evaluate the relationship between muscle fatigue and body posture. It was found that the trends of changes of median frequency were different based on muscle group as well as lower-limb body posture from this study.

Keywords

References

  1. 권영국, 이상훈, 지주옥, 백화점 근로자의 근 피로도 측정 및 정량화를 위한 근전도 평가, 대한인간공학회 학술대회논문집, 216-222, 1999.
  2. 김유창, 류영수, 쪼그려 앉은 작업에서 신체부담작업의 평가, 대한인간공학회지, 24(1), 37-41, 2005. https://doi.org/10.5143/JESK.2005.24.1.037
  3. 김정룡, 허리 폄 동작시 발생하는 근육피로 회복시간 연구, 대한인간공학회지, 21(2), 25-33, 2002. https://doi.org/10.5143/JESK.2002.21.2.025
  4. 농림어업인의 주요 상병 및 건강행태 비교분석, 농업인건강안전정보센터, 2004.
  5. 민병찬, 김전환, 전광진, 이동형, 김진수, 근전도에 의한 계단 상하행시 근 피로 비교, 한국산업경영시스템학회 학술대회지, 73-76, 2006.
  6. 박지수, 이승주, 김정룡, 앉은 작업자세에서 어깨의 동작에 따른 최대 근력, 근육피로도와 주관적 작업부하 측정, 대한인간공학회 춘계 학술대회, 국립금오공과대학교, 2008.
  7. 박희석, 공태식, 사무작업의 인간공학적 평가를 위한 자가 기입 체크리스트의 타당성 검토, 대한인간공학회지, 25(2), 77-84, 2006.
  8. 산업재해원인조사 재해보고서, 산업재해현황(2003-2006)보고서, 한국산업안전공단, 2006.
  9. 이인석, 정민근, 쪼그려 앉은 작업자세에서의 작업부하 평가, 대한인간공학회 학술대회논문집, 제1권, 90-94, 1997.
  10. 이인석, 정민근, 기도형, 심물리학적 방법을 이용한 다양한 하지자세의 부하 평가, 대한인간공학회지, 21(4), 47-65, 2002.
  11. 이상도, 심정훈, 작업조건의 변화에 따른 상지의 피로 특성 분석, 산업경영시스템학회지, 28(3), 75-86, 2005.
  12. 이태용, 김정룡, 신현주, 들기/내리기 빈도와 회복시 변화에 따른 몸통 근육의 피로도 분석, 대한인간공학회지, 25(2), 197-204, 2006.
  13. 정명철, 김정룡, 근육피로도 분석시 사용되는 매개변수들간의 민감도 비교 연구, 대한인간공학회 학술대회논문집, 제2권 406-313, 1997.
  14. 한정수, 김영은, 민기식, 안재용, 근피로도의 측정 및 정량화를 위한 근전도의 고찰, 대한기계학회 추계학술대회 논문집, 342-347, 1997.
  15. 현수돈, 김정룡, High Heel이 허리 근육피로에 미치는 영향에 관한연구, 대한인간공학회지, 16(3), 37-48, 1997.
  16. Aras, A., Westgaard, R. and Stranden, E., Postural angles as an indicator ofpostural load and muscular injury in occupational work situations, Ergonomics, 31, 915-933, 1988. https://doi.org/10.1080/00140138808966731
  17. Armstrong, T., Buckle, P., Fine, L., Harberg, M., Jonsson, B., Kilbom, A., Kuorinka, I., Silverstein, B., Sjogaard, G. and Viikari-Juntura, E., A conceptual model for work-related neck and upper-limb musculoskeletal disorders. Scandinavian Journal of Work, Environment and Health, 19, 73-74, 1993. https://doi.org/10.5271/sjweh.1494
  18. Arphorn, S., Limmongkok, Y., Pruktharathikul, V., Jalayondeja, W. and Chaikittiporn, C., The modified sculptors' workstation in pottery handicraft for reducing muscular fatigue and discomfort, The 8th IIES International Symposium, the 1st East Asian Ergonomics Federation Symposium, UOEH, Japan, 2008.
  19. Bernard, B. (Ed.), Musculoskeletal disorders and workplace factors: A critical review of epidemiological evidence for work-related musculoskeletal disorders of the neck, upper extremity, and lower back. DHHS(NIOSH) Publication No. 97-141, US Department of Health and Human Services, 1997.
  20. Chung, M., Lee, I., Kee, D. and Kim, S., A postural workload evaluation system based on a macro-postural classification, Human Factors and Ergonomics in Manufacturing, 12(3), 267-277, 2002. https://doi.org/10.1002/hfm.10017
  21. Corlett, E., Wilson, J. and Manenica, I., The ergonomics of working postures: Models, methods and cases, London: Taylor & Francis, 1986.
  22. Lee, I. and Chung, M., Workload evaluation of squatting work postures.In: L. Straker, and C. Pollock, (Eds.), Workload evaluation of squatting work postures: The second International Cyberspace Conference onErgonomics, The International Ergonomics Association Press, CurtinUniversity of Technology, Perth, Australia, 597-607, 1999.
  23. Lee, S., http://www.arthritiscenter.co.kr/, Unpublished Clinical Report, 2004.
  24. Minning, S., Eliot, C., Uhi, T. and Malone, T., EMG analysis of shoulder muscle fatigue during resisted isometric shoulder elevation, Journal of Electromyography and Kinesiology, 17, 153-159, 2007. https://doi.org/10.1016/j.jelekin.2006.01.008
  25. Perotto, A., Anatomical Guide for the Electromyographer: The Limbs and Trunk, 4th Edition, Charles C Thomas Publisher, Ltd., Springfield, Illinois, USA, 2004.

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