한국운동역학회지 (Korean Journal of Applied Biomechanics)

  • 제25권2호
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  • Pages.183-190
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  • 2015
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  • 1226-2226(pISSN)
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  • 2093-9752(eISSN)
한국운동역학회 (Korean Society of Applied Biomechanics)
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중량물 취급 보행 시 하지의 역학적 정렬에 따른 생체역학적 변화 분석

Analysis of Biomechanical Changes According to Mechanical Alignment of the Lower Limbs when Gait with a Material Handling

  • 이경일 (조선대학교 체육대학 체육학과) ;
  • 이철갑 (조선대학교 의과대학 직업환경의학과) ;
  • 송한수 (조선대학교 의과대학 직업환경의학과) ;
  • 홍완기 (조선대학교 체육대학 체육학과)
  • Lee, Kyung-Ill (Department of Physical Education, College of Physical Education, Chosun University) ;
  • Lee, Chul-Gab (Department of Physical Education, Graduate School of Chosun University) ;
  • Song, Han-Soo (Department of Physical Education, Graduate School of Chosun University) ;
  • Hong, Wan-Ki (Department of Physical Education, College of Physical Education, Chosun University)
  • 투고 : 2015.04.30
  • 심사 : 2015.06.30
  • 발행 : 2015.06.30
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초록

Objective : Walking with a Material handling is an activity frequently undertaken by agricultural workers in Korea, due to the nature of their work. This study aimed to investigate differences in biomechanical variables according to the mechanical alignment of the lower limbs when walking with a heavy load, and to use this as basic data in the design of various working environments to reduce the skeletomuscular burden on the knee joint. Method : The study subjects comprised of 22 right-foot dominant adult men and women aged between 20 and 23 years. The subjects were divided into a varus or valgus group according to the mechanical alignment of the lower limb by using radiographic findings. The subjects walked without any load and with a load of 10%, 20%, or 30% of their body weight held in front of them. The Kwon3d XP program was used to calculate biomechanical variables. Results : The flexion/extension moment of the knee joint showed a decreasing trend with increased load, irrespective of the mechanical alignment of the lower limb, while the varus group did not show normal compensatory action when supported by one leg at the point of maximum vertical ground reaction force. In addition, in terms of the time taken, subjects showed no difficulties in one-foot support time up to 20%/BW, but at 30%/BW, despite individual differences, there was an increase in single limb. The increased load resulted in a decrease in the ratio of standing phase to ensure physical stability. The valgus group showed a trend of increasing the stability of their center of mass with increasing load, through higher braking power in the early standing phase. Conclusion : In conclusion, although there was no statistical difference in biomechanical variables according to the mechanical alignment of the lower limbs, the varus group showed a more irregular walking pattern with a Material handling than the valgus group, partially proving the association between lower limb alignment and walking with a Material handling.

키워드

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피인용 문헌

  1. Analysis of the Characteristics of Ground Reaction Force According to the Level of Knee Osteoarthritis During Gait vol.25, pp.4, 2015, https://doi.org/10.5103/KJSB.2015.25.4.393