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The Effects of Lower Limb Muscle Activity on Postural Stability and Ground Type During Gait in Elderly Women

보행 시 여성노인의 자세안정성과 지면형태가 하지 근활성도에 미치는 영향

  • Woo, Byung-Hoon (Major of Sport & Leisure Studies, College of Physical Education, Kyonggi University) ;
  • Park, Yang-Sun (Department of Physical Education, College of Performing Arts and Sport, Hanyang University)
  • 우병훈 (경기대학교 체육대학 사회체육학과) ;
  • 박양선 (한양대학교 예술체육대학 체육학과)
  • Received : 2015.01.30
  • Accepted : 2015.03.27
  • Published : 2015.03.31

Abstract

Objective : The purpose of this study was to analyze the effects of lower limb muscle activity on postural stability and ground type in elderly women subjects. Method : Forty two subjects participated in the experiment (high group - age: $74.29{\pm}4.13yr$, height: $152.44{\pm}5.54cm$, weight: $57.43{\pm}6.16kg$, BMI: $24.77{\pm}2.99$, low group - age: $77.67{\pm}5.16yr$, height: $151.40{\pm}3.93cm$, weight: $60.92{\pm}6.40kg$, BMI: $26.59{\pm}2.57$). Wireless EMG with eight channels was used. Ground types were classified as flat and cushion. Results : In the double-support phase, left and right rectus femoris, left biceps femoris, left and right tibialis anterior, and left gastrocnemius did not show a significant difference in postural stability according to ground type. However right biceps femoris and gastrocnemius showed higher muscle activity in the elderly women group with lower postural stability. In the single-support phase, left and right rectus femoris, right biceps femoris, and left and right tibialis anterior did not show a significant difference in postural stability according to ground type. In addition, left biceps femoris had higher muscle activity in the elderly women group with lower postural stability. Left gastrocnemius had higher muscle activity in the elderly women group with higher postural stability and right gastrocnemius had higher muscle activity in the elderly women group on cushion ground. Conclusion : In a dynamic postural stability and cushion ground, biceps femoris and gastrocnemius muscle activity were high. As a result, biceps femoris and gastrocnemius muscle strengthening exercise on cushion ground could be beneficial in the prevention of falling.

Acknowledgement

Supported by : 한국연구재단

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