The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Effects of the Support Surface Condition on Muscle Activity of Trunk Muscles during Weight Shifting Exercise

지지면에 따른 체중 이동 시 체간 근육의 근활성도에 미치는 영향

  • Jung, Kyoung-Sim (Department of Physical Therapy, Graduate School, Sahmyook University) ;
  • Chung, Yijung (Department of Physical Therapy, Sahmyook University)
  • 정경심 (삼육대학교 대학원 물리치료학과) ;
  • 정이정 (삼육대학교 물리치료학과)
  • Received : 2012.09.13
  • Accepted : 2012.10.11
  • Published : 2012.10.25
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Abstract

Purpose: This study examined the muscle activity of the trunk muscles during weight shifting exercises on a stable and unstable surface. Methods: Ten healthy young subjects (4 males, 6 females) with no medical history of lower-extremity or lumbar spine disease were enrolled in this study. The muscle activity was recorded using surface electromyography (EMG) electrodes from the both sides of the external obliques and erector spinae muscles. Results: The EMG activities of the both rectus abdominalis, both external obliques and erector spinae muscles were significantly higher when the weight shifting exercise was performed on a firm surface than when a balance pad with a balance ball was used. In weight shifting exercises, the EMG activity of the contralateral external obliques and erector spinae muscles was significantly higher than that of the ipsilateral external obliques and erector spinae muscles under all three support surface conditions. Conclusion: Performing weight shifting exercise using an unstable surface is a useful method for facilitating the trunk-muscle strength and trunk stability.

Keywords

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