Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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A Comparison of Compensatory Muscle Activation of Gluteus Maximus and Gluteus Medius in Subjects With and Without Chronic Ankle Instability During Three Functional Postures

세 가지 기능적 자세에서 만성발목불안정성의 대상자와 정상인의 대둔근과 중둔근 보상적 근활성도 비교

  • Oh, Hee-Joo (Dept. of Physical Therapy, College of Natural Science, Daejeon University) ;
  • Kim, Mi-Sun (Dept. of Physical Therapy, The Graduate School, Daejeon University) ;
  • Choi, Jong-Duk (Dept. of Physical Therapy, College of Natural Science, Daejeon University)
  • 오희주 (대전대학교 자연과학대학 물리치료학과) ;
  • 김미선 (대전대학교 일반대학원 물리치료학과) ;
  • 최종덕 (대전대학교 자연과학대학 물리치료학과)
  • Received : 2014.08.07
  • Accepted : 2014.11.17
  • Published : 2015.02.19
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Abstract

The purpose of this study was to compare the change in electromyography (EMG) activity in the gluteus maximus (G-max) and the gluteus medius (G-med) in subjects with and without chronic ankle instability (CAI) during three functional postures. Twenty four females were recruited for this study. Subjects were assigned into two groups: with CAI ($n_1=12$) and without CAI ($n_2=12$). The assessment postures were rotational squat, one leg stand above a gradient and crossed leg-sway. Electromyographic activities of the G-max and the G-med were recorded using surface EMG and was normalized using the maximal voluntary isometric contraction elicited using a manual muscle testing. Independent t-test was used to determine the statistical differences between two groups during the three functional postures. The comparisons of the three posture between two groups were performed using a one-way repeated analysis of variance. A Bonferroni adjustment used for post hoc analysis. The activation of EMG on G-max performing the one leg stand above a gradient and crossed leg-sway in subjects with CAI is significantly higher than normal group (p<.05). The activation of EMG on the G-max during the rotational squat was significantly increased, compared to those of the one leg stand above a gradient and crossed leg-sway (p<.05). The activation of EMG on G-med performing three exercise at CAI is significantly higher than normal group (p<.05). The activation of EMG on the G-med during the crossed leg-sway was significantly increased, compared to the rotational squat (p<.05). This study provides valuable information for clinician who research CAI.

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References

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