일과성의 편심성 운동이 상지의 근육부종, 기계적 속성 및 영상학적 변화에 미치는 영향: 진동 적용의 효능검증
Effects of a single bout of eccentric exercise on muscle swelling, imaging and mechanical properties in upper limb: Application of vibration
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[목적] 일과성의 편심성 운동에 의한 운동유발성 근손상(EMID) 발현 후 전동처치가 상지근의 기능학적, 영상학적 그리고 근육의 기계적 속성의 변화에 미치는 영향을 평가하려는 목적으로 수행하였다. [방법] 편심성 수축에 익숙하지 않고 스포츠 활동을 하지 않는 20대 남성들을 대상(총 23명)으로 비우세측 팔꿈치 굴근에 대한 편심성 운동을 5세트 6회 수행하였고, 진동처치를 실시하지 않는 그룹 11명과 진동처치그룹 12명으로 나눠 EIMD 지표들의 변화를 관찰하였다. 진동처치는 (12 Hz frequency, 4 mm amplitude) 편심성 운동 후 60초 간 3세트 실시하였다. [결과] 진동처치그룹은 EIMD 지표인 근육부종, 초음파 반향세기 및 기계적 속성에서 그룹 간 통계적으로 유의미한 차이를 나타내었다(p<.05). 그러나 근통증, 관절가동범위 및 최대자발적수축 측면에서는 진동처치로 인한 경향이 나타났지만 통계적으로 유의미한 차이는 나타나지 않았다.[결론] 본 연구의 진동처치는 근육부종, 초음파 반향세기 및 기계적속성과 같이 근육의 quality에 긍정적인 영향을 미치는 것으로 보인다. 차후에는 진동의 세기, 폭, 시간 등의 고려함과 동시에 진동부위에 따른 임상결과를 충분히 타진하여 보다 효율적인 진동처치 적용이 다각적으로 분석 및 평가되어져야 할 것으로 판단된다.
Abstract
[Purpose] The purpose of this study was to investigate the effect of vibration therapy on the functional, imaging, and mechanical properties in elbow flexor after a single bout eccentric exercise. [Methods] Twenty-three untrained adults male participated in this study [CON(control)= 11, VT(vibration)= 12]. Volunteers performed 5-set of 6 maximal (90˚/s) eccentric contractions of the non-dominant elbow flexor on a isokinetic dynamometer. Vibration was applied using a side alternating vibratory platform (12 Hz frequency, 4 mm amplitude) with 3-set of 60 sec during 3-day after eccentric exercise. [Results] The VT group showed a reduction in exercised-induced muscle damage(EIMD) symptoms in the form of attenuating muscle swelling and echo intensity (P<.05) compared with the CON, mechanical properties were improvement (P<.05) compared with the CON. However, muscle soreness, range of motion and maximal voluntary isometric contraction were not significant (P<.05). [Conclusion] As currently practiced, vibration therapy after eccentric exercise may reduce EIMD by improving quality of the muscle, suggesting that this therapy is an effective strategy for EIMD.
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