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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국전문물리치료학회 한국전문물리치료학회지 한국전문물리치료학회지 제5권 제1호
발행연도
1998.1
수록면
30 - 43 (14page)

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초록· 키워드

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The purposes of this study were to examine the effect of two different pelvicalignments and the Valsalva maneuver on electromyographic <EMG) activity of theerector spinae during squat lifting and lowering, and to find an efficient method forsquat lifting and lowering. Twenty healthy men in their twenties lifted and loweredloads using four different methods: 1) anterior pelvic tilt position with the Valsalvamaneuver, 2) anterior pelvic tilt position without the Valsalva maneuver, 3) posteriorpelvic tilt with the Valsalva maneuver, 4) posterior pelvic tilt without the Valsalvamaneuver. The EMG activity of erector spinae was recorded during both lifting andlowering with each method. The EMG activity of each individual was normalized toEMG activity produced by muscle during maximal voluntary contraction. Two-wayanalysis of variance for repeated measures (2 x 2) was used to analyze the effect ofthe two factors: 1) pelvic tilt position (anterior pelvic tilt, posterior pelvic tilt) , 2) theValsalva maneuver (with and without). Analysis was performed separately for thelifting and lowering. The results were as follows:1) EMG activity of erector spinae was greater when the pelvis was tilted anteriorlythan when the pelvis was tilted posteriorly during squat lifting and squat lowering. 2) There was no difference between EMG activity of erector spinae with theValsalva maneuver and EMG activity of erector spinae without the Valsalvamaneuver during squat lifting and squat lowering. These results suggest that thegreater EMG activity of erector spinae with an anterior pelvic tilt position duringsquat lifting and squat lowering may ensure optimal muscular support for the spinewhile handling loads, but the Valsalva maneuver may have less effect on erectorspmae.

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