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Effects of Manual Postural Correction on the Trunk and Hip Muscle Activities During Bridging Exercises

한국전문물리치료학회지 2014년 21권 3호 p.38 ~ 44
김소영, 김선엽, 장현정,
소속 상세정보
김소영 ( Kim So-Young ) - 바로선병원 물리치료실
김선엽 ( Kim Suhn-Yeop ) - 대전대학교 자연과학대학 물리치료학과
장현정 ( Jang Hyun-Jeong ) - 대전대학교 자연과학대학 물리치료학과

Abstract


The aim of this study was to investigate the effects of different postural correction in the electromyographic (EMG) activity of the trunk and hip muscles during bridging exercises. Twenty-four healthy subjects volunteered for this study. The muscle activity was recorded with surface electrodes over the erector spinae, multifidus, gluteus maximus (GM), and hamstring (Ham) muscles; it was measured by using surface EMG equipment under the following 3 experimental conditions: manual postural correction, verbal correction, and no correction. The maximal voluntary isometric contraction (MVIC) was determined for each muscle group in order to represent each exercise as a percentage of MVIC and allow for standardized comparison between subjects. A one-way analysis of variance was used to determine significant differences in the EMG activities of each muscle between the 3 experimental groups. During bridging exercises, the manual postural correction on normalized EMG activity of the GM muscle during manual guiding was significantly higher than during verbal guiding and without guiding (p<.05). Furthermore, the GM/Ham ratio was significantly higher during manual guiding than during verbal guiding and without guiding (p<.05). These findings suggest that the activities of the hip and trunk muscles may be favorably modified with manual guiding during bridging exercises.

키워드

Bridging exercise; Electromyography; Manual postural correction; Trunk muscle

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