The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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The Change of Muscle Activities of Trunk Muscles during Various Leg-Crossing Positions in Low Back Pain Patients

다양한 다리 꼬기 자세가 요통환자의 체간근 활성도에 미치는 영향

  • Kim, Tae-Ho (Department of Physical Therapy, Daegu Health College) ;
  • Seo, Hyun-Kyu (Department of Physical Therapy, Daegu Health College) ;
  • Gong, Won-Tae (Major in Physical Therapy, Dept. of Rehabilitation Science Graudate School, Daegu University)
  • 김태호 (대구보건대학 물리치료과) ;
  • 서현규 (대구보건대학 물리치료과) ;
  • 공원태 (대구대학교 대학원 재활과학과 물리치료)
  • Published : 2007.10.25
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Abstract

Purpose: Leg-crossing sitting is very common for men and woman. No solid evidence exists for either a beneficial or a detrimental effect of this posture. This study investigated the change of activities of trunk muscles between the normal group and the low back pain group during various leg-crossing positions. Methods: The subjects were consisted of 10 subjects who don't have low back pain and 10 subjects who have low back pain. In this study, we used electromyography(EMG) to evaluate the activities of both the trunk muscles (rectus abdominis, external oblique, internal oblique, and multifidus) during various leg-crossing positions (up-right, leg-crossing, tailor-crossing, and ankle-crossing). We analyzed the data by using repeated one way ANOVA. Results: In normal group, there were increased in EMG activities of trunk muscles, but no significant differences during leg-crossing positions. In back pain group, there were increased in EMG activities of right external oblique, left. internal oblique, and both multifidus muscles in leg-crossing and tailor-crossing position, but no significant differences during leg-crossing positions. There was no significant difference of muscle activity of trunk muscles between the back pain group and the normal group. Conclusion: We suggest that low back pain people who have weak muscles of rectus abdominis, external and internal oblique are often experienced in leg-crossing posture than normal. To compensate this unstability of trunk, leg-crossing posture is substituted passive structure for activities of active muscle.

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