골격근의 신장성 근수축 운동에 따른 휴식시간의 차이가 혈중물질, 근손상 및 근재생 관련 지표에 미치는 영향
Effects of Rest Interval Following Eccentric Muscle Contraction Exercise on Circulating Substance, Parameters Related to Damage and Regeneration in Skeletal Muscle
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초록
[서론] 이 연구는 신장성근수축 (Eccentric muscle contraction; ECC)운동 시 휴식시간의 차이가 염증물질, 면역세포, 근육재생관련 지표와 어떠한 관련성이 있는가를 검증하는데 그 목적이 있다. [방법] 연구대상은 최근 6개월간 저항성 운동 프로그램을 실시하지 않은 건강한 일반 성인남자 15명을 선정하였다. 각 피험자는 체성분 검사를 실시하고, 2주후에 팔꿈치 굽힘근(elbow flexors)의 ECC 운동을 세트 사이에 1분, 3분, 5분의 휴식시간을 적용하여 6회 10세트 실시하였다. ECC 운동 및 측정은 혈중 백혈구의 일일 주기의 변화를 최소화하기 위하여 동일한 시간에 실시하였다. 혈중물질(백혈구수, 호중구수), 골격근손상 지표(ROM, VAS, 혈장 CK) 및 골격근 재생지표(CD34+)는 운동전, 운동 직후, 운동 시기의 1일, 2일, 3일, 및 4일 후에 측정하였다. [결과] VAS 및 혈장 CK는 1분 휴식시간에 비해 3분과 5분 휴식시간에서 유의하게 감소하였으며(p<.05), ROM은 1분 휴식시간에 비해 3분과 5분 휴식시간에서 회복이 빠른 것으로 나타났다(p<.05). 염증물질 및 CD34+는 휴식시간에 따른 영향을 미치지 않았다. [결론] 이 연구에서는 ECC 운동 시 휴식시간의 차이는 근육손상 관련지표에 영향을 미치는 것으로 확인하였다.
Abstract
[INTRODUCTION] The purpose of this study was to measure changes of rest interval following eccentric muscle contraction exercise on circulating substance, parameters related to damage and regeneration in skeletal muscle. [METHOD] Fifteen healthy men who had not been involved in a resistance-training program at least 6 months prior to the present study were recruited as subjects. All subjects performed maximal eccentric exercise of the elbow flexors with their dominant arm. The exercise consisted of 10 sets of 6 maximal voluntary eccentric contractions of the elbow flexors with 1-min, 3-min and 5-min rest between sets. Circulating substance (leukocytes, neutrophils), Muscle damage index (ROM, VAS, Plasma CK) and muscle regeneration (CD34+) were examined before, immediately after, 1, 2, 3, and 4 days following the exercise. [RESULT] VAS and Plasma CK were significantly decreased in the 3-min and 5-min rest than in the 1-min (p<.05). ROM was significantly faster in the 3-min and 5-min rest than in the 1-min (p<.05). Circulating substance (leukocytes, neutrophils and CD34+ were not significantly different at time course between rest. [CONCLUSION] These results confirmed that difference in rest time affects a muscle damage related index.
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