Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Effects of Forefoot Rocker Shoes with Metatarsal Bar on Lower Extremity Muscle Activity and Plantar Pressure Distribution

중족골 바 형태의 전족부 라커 신발이 하지 근 활성도 및 족저압력 분포에 미치는 영향

  • Park, In-Sik (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Jung, Ji-Yong (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Jeon, Keun-Hwan (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Won, Yong-Gwan (School of Electronics and Computer Engineering, College of Engineering, Chonnam National University) ;
  • Kim, Jung-Ja (Division of Biomedical Engineering, College of Engineering, Chonbuk National University)
  • 박인식 (전북대학교 대학원 헬스케어공학과) ;
  • 정지용 (전북대학교 대학원 헬스케어공학과) ;
  • 전근환 (전북대학교 대학원 헬스케어공학과) ;
  • 원용관 (전남대학교 공과대학 전자컴퓨터공학부) ;
  • 김정자 (전북대학교 공과대학 바이오메디컬공학부)
  • Received : 2012.01.31
  • Accepted : 2012.03.23
  • Published : 2012.03.31
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Abstract

The purpose of this study was to evaluate the effects of forefoot rocker shoes equipped with a metatarsal bar on lower extremity muscle activity and plantar pressure distribution. Ten healthy women in the age of twenties were participated in this study as the subjects. All subjects walked on a treadmill(Gait Trainer, BIODEX, USA) wearing normal shoes and metatarsal bar shoes, during which the plantar pressure distribution and muscle activity were measured. Using Pedar-X system(Novel Gmbh, Germany), the plantar pressure was measured for six regions of the foot: forefoot, midfoot, rearfoot, 1st metatarsal, 2-3th metatarsal, and 4-5th metatarsal, and for each sub-region, 4 features such as maximum force, contact area, peak pressure, and mean pressure were analyzed based on the plantar pressure. EMG(Electromyography) activity was measured by attaching surface electrodes to the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius medial head, and magnitude of muscle contraction was analyzed in IEMG(Integrated EMG) value. The results show that the maximum force, contact area, peak pressure, and mean pressure in the midfoot all increased while maximum force, peak pressure, contact area, mean pressure in the 1st metatarsal and 2-3th metatarsal all decreased when wearing functional shoes. Also, muscle activities in the four muscles were all decreased when wearing the functional shoes. This paper suggests that forfoot rocker shoes equipped with a metatarsal bar can help disperse the high pressure and absorb the shock to the foot as well as give positive influence on gait pattern and postural stability by reducing muscle fatigue during walking.

Keywords

References

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