Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Biomechanical Analysis on Locomotion with Lower Extremity Supporter

하체서포터 착용 이동 시의 운동역학적 분석

  • Lee, Kyung-Il (Department of Physical Education, College of Physical Education, Chosun University) ;
  • Hong, Wan-Ki (Department of Physical Education, Graduate School of Chosun University) ;
  • Lee, Chul-Gab (Department of Occupational and Environmental Medicine, School of Medicine, Chosun University)
  • 이경일 (조선대학교 체육대학 체육학부) ;
  • 홍완기 (조선대학교 대학원 체육학과) ;
  • 이철갑 (조선대학교 의과대학 산업의학과)
  • Received : 2011.03.22
  • Accepted : 2011.06.22
  • Published : 2011.06.30
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Abstract

The purpose of this study was to analyze the effects of the use of the lower extremity supporter to ground reaction force(GRF) & EMG in women. Five women participated in the experiment conducted in the study(age: $46.7{\pm}3.5$ yrs, weight: $52.3{\pm}2.2$ kg, lower extremity height: $74.1{\pm}0.9$ cm, knee height: $40.7{\pm}1.4$ cm). The Ground reaction force was measured by AMTI ORG-6 and the Muscle activity of the lower extremity was measured by an 8-channel surface EMG system(Noraxon Myoresearch, USA, 1000Hz). We statistically compared muscle activity and ground reaction force with and without the lower-extremity supporter by one-way repeated ANOVA. The results were as follows. First, the use of the lower extremity supporter affects the ground reaction force along the anterior-posterior axis(Y). Second, the vertical(Z-axis) reaction force on the upper part of the lower extremity supporter increase because of the difference between the interval of vertical movement. Third, the muscle activity of the lateral gastrocnemius and rectus femoris was higher in the upper part of the lower extremity supporter. Further research for example, on a comparative analysis of joint moments, the effects of direct stressor on joints. and the relationship between muscle activity and joint movement, is necessary for a better understanding of the effects of the lower-extremity supporter.

Keywords

References

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