Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Analysis on Biomechanical Differences Depending on Changes in Postures during Farm Work

  • Lee, Chulgab (Chosun University, Department of Occupational and Environmental Medicine) ;
  • Hong, Wanki (Chosun University, Department of Physical Education)
  • Received : 2015.10.21
  • Accepted : 2016.04.22
  • Published : 2016.10.31
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Abstract

Objective: This study looks into biomechanical variables occurring when one moves in a sitting posture, and presents objective references to make improvements in work environments of farm workers. Background: The farmers have more common musculoskeletal disorders compared to other professions, because they are much more exposed to biomechanical risk factors. The sitting posture that is the representative form of the squatted, can cause typical knee joint diseases, such as osteoarthritis or patellofemoral pain syndrome of the knee joint. Therefore, a quantitative study of knee load upon the movement in a squatting posture is required. Method: In order to proceed with its investigation, the study examined movements in a sitting posture with and without a lower body supporter through a threedimensional image analysis and by using Surface EMG. The study compared and analyzed the average muscle activity and the maximum muscle activity as well. Results: Every movement in a sitting posture is related to loads onto the knee joints and, when the farm workers move to sides, the study observed a high level of bowlegged moment. The study also noticed differences in muscle activity of medial gastrocnemius with and without the lower body supporter. Conclusion and Application: The study argues that what has been discussed so far is evidence to prove how the farm working environments should be improved in consideration of these movements observed when the farm workers move in a sitting posture.

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References

  1. Abdel-Aziz, Y.L. and Karara, H.M., Direct linear transformation from comparator coordinates in object-space coordinates in closerange photogrammetry. Proceedings of the ASP Smpoium of Close-Range Photogrammetry. Urbana, IL. 1971.
  2. Burgess, R., Squat, Stoop, or Something in Between. International Journal of Industrial Ergonomics, 31(3), 143-148, 2003. https://doi.org/10.1016/S0169-8141(02)00190-7
  3. Cram, J.R. and Kasman, G.S., Introduction the Surface Electromyography, Aspen Publishers Inc, Gaithersburg, Maryland, 1998.
  4. Chung, M.K., Lee, I. and Kee, D., Effect of Stool Height Holding Time on Postural Load of Squatting Postrues. International Journal of Industrial Ergonomics, 32(5), 307-309, 2003.
  5. Jung, H.S. and Jung, H.H., Evaluation of Proper Height for Squatting Stool and the Ergonomic Design of Wearable Stool. Journal of the Ergonomics Society of Korean, 18(5), 307-309, 2005.
  6. Kim, I., Kim, H.A., Seo, Y.I., Song, Y.W., Jeong, J.Y. and Kim, D.H., The pre-valence of knee osteoarthritis in elderly community residents in Korea. Journal of Korean Medicine Science, 25(2), 293-298, 2010. https://doi.org/10.3346/jkms.2010.25.2.293
  7. Kim, Y.C. and Jang, E.J., The study used Brog's Scale on the Lower Extremity Supporter. Journal of the KOSOS, 23(5), 105-110, 2008.
  8. Kim, Y.C. and Ryu, Y.S., Ergonomic Evaluation of The Hazardous Jobs in Squatting Work Posture. Journal of the Ergonomics Society of Korea, 24(1), 37-41, 2005. https://doi.org/10.5143/JESK.2005.24.1.037
  9. Lee, I.S., Jung, K.M. and Ki, D.H. Evaluation of Postural load of Varying leg Posture using the Psychophysical Scaling. Journal of the Ergonomics Society of Korea, 21(4), 47-65, 2002.
  10. Lee, K.I., Hong, W.K. and Lee, C.G., Biomechanical Analysis on Locomotion with Lower Extremity Supporter. Korean Journal of the Sports Biomechanics, 21(2), 215-222, 2011. https://doi.org/10.5103/KJSB.2011.21.2.215
  11. National Institute for Occupational Safety and Health (NIOSH), Musuloskeletal 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) Publisher, 1981.
  12. Neumann, D.A., Kinesiology of the Musculoskeletal System; Foundations for Physical Rehabilitation. St. Louis. Mosby, 2004.
  13. Plagenhoef, S., Gaynor, E. and Abdelnour, T., Anatomical data for analysis human motion. Research Quarterly for Exercise and Sports, 54(20), 169-178, 1983. https://doi.org/10.1080/02701367.1983.10605290
  14. Straker, L., Evidence to Support using Squat, Semisquat and Stoop Techniques to Lift Low-lying Objects. International Journal of Industrial Ergonomics, 31(3), 149-160, 2003. https://doi.org/10.1016/S0169-8141(02)00191-9
  15. Rural Development Administration (RDA), http://farmer.rda.go.kr/pro/index.do?g_cd=999001001002 (retrieved December 12, 2015).
  16. Tylkowski, C.M., Simon, S.R. and Mansour, J.M., Internal rotation gait in spastic cerebral palsy in the hip. In Nelson, J. P.(Ed), Proceedings of 10 th Open Scientific Meeting of the Hip Society, 89-125, 1982.