Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Reproduction of Walking Asymmetry in Knee Osteoarthritis with Split-Belt Conditions

분할 벨트 조건을 이용한 무릎 관절 이상군의 보행 비대칭성 모사

  • Lee, Myunghyun (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Heewon (Graduate School of Convergence Science and Technology, Seoul National University) ;
  • Park, Sukyung (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • 이명현 (카이스트 기계공학과) ;
  • 박희원 (서울대학교 융합과학기술대학원) ;
  • 박수경 (카이스트 기계공학과)
  • Received : 2015.08.03
  • Accepted : 2015.09.02
  • Published : 2015.10.01
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Abstract

Walking on split-belt treadmill has been applied to study walking disabilities, such as osteoarthritis (OA), to show asymmetric walking characteristics. In this study, we compared asymmetric walking in OA patients with healthy subjects under split-belt conditions and examined the reproduction of walking asymmetry in OA. Seven OA patients were instructed to walk at four frequencies, while four healthy subjects walked on a treadmill with tied-belt and split-belt conditions. To compare walking asymmetries, kinetic and kinematic measurements were made using force-plates and motion capture cameras, and subsequently center of mass (CoM) velocity, mechanical work and potential energy were calculated. Horizontal velocity change during split-belt walking of healthy subjects was similar to OA patients. Difference of mechanical work during single support phase occurred due to fall of CoM in fast belt. OA walking asymmetry could be reproduced by reducing differences of belt speeds to prevent rapid fall of CoM.

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References

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