Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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An Analysis of Plantar Foot Pressure Distribution and COP Trajectory Path in Lifting Posture

들기 자세에서 족저의 압력 분포와 압력중심 이동거리의 분석

  • Lee, Myoung-Hee (Department of Rehabilitation Science, Graduate School, Daegu University) ;
  • Han, Jin-Tae (Department of Physical Therapy, Sunlin College) ;
  • Bae, Sung-Soo (Department of Physical Therapy, Daegu University)
  • 이명희 (대구대학교 대학원) ;
  • 한진태 (선린대학 물리치료과) ;
  • 배성수 (대구대학교 재활과학대학 물리치료학과)
  • Received : 2008.10.27
  • Accepted : 2009.03.05
  • Published : 2009.03.31
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Abstract

The purpose of this study was to investigate the effect of two different lifting posture on the plantar foot pressure, force and COP(center of pressure) trajectory path during object lifting. Fourteen healthy adults who had no musculoskeletal disorders were instructed to lift with two postures(stoop and squat) and two object weights(empty box and 10 kg box). Plantar foot pressures, forces and COP trajectory path were recorded by the F-mat system(Tekscan, Boston, USA) during object lifting with barefoot. Plantar foot surface was defined as seven regions for pressure measurement; two toe regions, three forefoot regions, one midfoot region and one heel region. Paired t-test was used to compare the outcomes of peak pressure and maximum force with different two lifting postures and two object weights. Plantar peak pressure and maximum force under hallux was significantly greater in squat posture than stoop posture during the two different boxes lifting(p<.05). During the empty box lifting, maximum force under lessor toes was significantly less and plantar peak pressure under second metatarsal region was significantly greater in squat than stoop(p<.05). Maximum force under heel was significantly less in squat than stoop posture during 10kg box lifting(p<.05). Finally, COP trajectory path was significantly greater in squat than stoop(p<.05). These findings confirm that there are significantly change in the structure and function of the foot during the object lifting with different posture. Future studies should focus on the contribution of both structural and functional change to the development of common foot problems in adults.

Keywords

References

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