Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Effect of heel Heights of shoe on Muscle Activation of Lower Extremity on the Rocking Surface in older Women

흔들림이 있는 표면에서 여성 노인의 신발 굽 높이가 하지 근육 활성도에 미치는 영향

  • Kim, Kyoung (Dept. of Physical Therapy, Daegu University) ;
  • Cho, Yong-Ho (Graduate School of Rehabilitation Science, Daegu University) ;
  • Cha, Yong-Jun (Graduate School of Rehabilitation Science, Daegu University) ;
  • Song, Byung-Seop (Dept. of Rehabilitation Science & Technology, Daegu University)
  • 김경 (대구대학교 재활과학대학 물리치료학과) ;
  • 조용호 (대구대학교 재활과학대학원) ;
  • 차용준 (대구대학교 재활과학대학원) ;
  • 송병섭 (대구대학교 재활과학대학 재활공학과)
  • Published : 2008.08.30
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Abstract

The purpose of this study was to investigate muscle activation of lower extremity such as rectus femoris, tibialis anterior and soleus according to 0cm(bare foot), 4cm and 7cm heel height of shoe on the rocking surface in older women. 20 older women who did not have any lower musculoskeletal and neurological disorders in the past were participated in this study. Each subject was standing for 15 seconds on the level 8 of Biodex Stability System (BSS) while wearing 4cm and 7cm heel height shoes including bare foot. Electromyography was used to measure muscle activation of lower extremity, and the muscle activation was expressed as a percentage of maximal voluntary isometric contraction (% MVIC). We measured % MVIC of three muscles during 5 seconds except for the first 5 seconds and last 5 seconds. SPSS 12.0 program was used for this study. Repeated one-way analysis of variance(ANOVA) was performed to compare the significant difference among the muscles of lower extremities according to heel heights of shoe on the rocking plate. % MVIC of each muscle such as rectus femoris, tibialis anterior and soleus regarding heel heights of shoe had statistically significant differences (p<0.05). The results of contrast test were as follows; 1) % MVIC of rectus femoris had significant differences between barefoot and 4cm, and barefoot and 7cm. 2) % MVIC of tibialis anterior had significant differences between barefoot and 4cm, barefoot and 7cm, and 4cm and 7cm. 3) % MVIC of soleus had significant differences between barefoot and 7cm, 4cm and 7cm. The results indicate that all commonly responsive muscle on the conditions of barefoot, 4cm, and 7cm shoe height on the rcoking surface is tibialis anterior muscle. We found out that the more heels of shoe high, the more muscle activation increases. High-heeled shoes above 7cm remarkably increase the muscle activation of lower extremity and may result in muscle fatigue. Thus, these shoes may summate risk factors of falls in older women. We can acknowledge that the heels above 4 cm affect each muscle activation in lower extremity on the rocking surface.

Keywords

References

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