Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Evaluation for Biomechanical Effects of Metatarsal Pad and Insole on Gait

보행 중 중족골 패드와 인솔의 생체역학적 영향성 평가

  • Choi, Jung-Kyu (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Park, In-Sik (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Lee, Hong-Jae (Department of Rehabilitation Medicine, Inje University, Ilsan Paik Hospital) ;
  • 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)
  • 최정규 (전북대학교 대학원 헬스케어공학과) ;
  • 박인식 (전북대학교 대학원 헬스케어공학과) ;
  • 이홍재 (일산백병원 재활의학과) ;
  • 원용관 (전남대학교 공과대학 전자컴퓨터공학부) ;
  • 김정자 (전북대학교 공과대학 바이오메디컬공학부)
  • Received : 2011.07.29
  • Accepted : 2011.12.22
  • Published : 2011.12.31
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Abstract

The purpose of this study was to evaluate the effects of metatarsal pad (MP) compared with barefoot and MP with using different insoles on gait. 15 healthy females who had no history of injury in the lower extremity with an average age of 22.7 year(SD=1.35), height of 160 cm(SD=3.4), weight of 48.8 kg(SD=5.52) and average foot size of 232.5 mm(SD=6.8) participated in this study as the subjects. The subjects walked on a treadmill under four different experimental conditions: 1) walking with barefoot, 2) walking wearing MP 3) walking wearing a soft insole with MP(SIMP), 4) walking wearing a rigid insole with MP(HIMP). During walking, foot pressure data such as force, contacting area, peak pressure, and mean pressure was collected using Pedar-X System(Novel Gmbh, Germany) and EMG activity of lower limb muscles such as tibialis anterior(TA), lateral gastrocnemius(LG), rectus femoris(RF), and musculus biceps femoris(MBF) was gathered using Delsys EMG Work System(Delsys, USA). Collected data was then analyzed using paired t-test in order to investigate the effects of each of experimental conditions. As a result of the analysis, when MP and HIMP were equipped, overall contacting area was increased while the force, peak pressure and the mean pressure were decreased. Especially, when the SIMP was equipped, every data were significantly decreased. In case of EMG, wearing MP, SIMP and HIMP made three muscles(TA, LG, RF)'s activity decrease. A result of the analysis will be able to apply for manufacturing functional shoes, diabetes shoes, senior shoes and lower extremity orthosis. Significance of the study due to a metatarsal pad and the insole is to analyze the changes in muscle strength.

Keywords

References

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