냉치료가 등속성 수축 후의 지연성 근통증 관련 변인과 체력에 미치는 영향 = Effects of cryotherapy on variables related to delayed onset of muscle soreness and physical fitness after isokinetic exercise

국문 초록 (Abstract)

등속성 수축의 경우, 등장성 수축과 달리 단축성 수축 후에 지연성 근통증이 유의하게 나타나는 것으로 보고되었다. 그러나 등속성 수축 후 나타난 DOMS에 대한 냉치료의 효과를 밝히는 연구가 매우 미흡하였다. 이에 본 연구에서는 냉치료가 등속성 수축 후의 DOMS 관련 변인과 체력에 미치는 영향을 규명하고자 하였다. 20대 남자 9명을 대상으로, 한 쪽 하지로 등속성 수축을 실시하도록 하여 근통증을 유발시킨 후, 냉치료 처치에서는 운동 후 3일에 걸쳐 하지에 매일 15분씩 냉치료를 실시하였고, 14일 간격으로 실시된 통제 처치에서는 동일한 기간 동안 아무런 처치를 하지 않았다. 모든 피검자는 이 두 가지 처치의 실험에 반복적으로 참여하였다. 두 처치 기간 중 운동 전, 운동 후 24시간, 48시간, 그리고 72시간 시점에서 DOMS와 관련된 변인인 CPK와 통증 자각도, 그리고 체력과 관련된 변인인 무릎관절의 ROM과 한발 제자리멀리뛰기를 측정하여, 두 처치 간·네 시점 간에 비교하였다. CPK는 냉치료 처치 후 통제 처치에 비하여 더 빠르게 낮아지는 경향을 보였고, 통증 자각도는 두 처치 간에 유의한 차이가 없는 것으로 나타났다. 냉치료는 무릎관절 ROM에는 유의한 영향을 미치지 못하였으나, 한발 제자리멀리뛰기 기록은 냉치료 처치 후에 유의하게 빠르게 회복되었다. 결론적으로, 등속성 수축에 따라 유발된 DOMS가 냉치료에 의하여 효과적으로 완화된 것으로 보인다.

다국어 초록 (Multilingual Abstract)

This study was designed to examine the effects of cryotherapy on variables related to delayed onset of muscle soreness (DOMS) and physical fitness occurred after isokinetic exercise. Nine male subjects, aged 24.0±0.72 yrs, underwent two sets of experiments, such as cryotherapy trial and control trial, repeatedly according to counterbalanced order. Each subject performed isokinetic exercise using concentric contraction, followed by cryotherapy at lower extremities for 15 minutes for following three days in the cryotherapy trial, and no treatment was applied in the control trial. Before the exercise, 24 hrs, 48 hrs, and 72 hrs after the exercise, the variables related to DOMS, i.e., CPK and soreness rating scale, and the variables related to physical fitness, i.e., ROM at knee joint and long jump with one leg standing, were measured. The data of the two trials were compared utilizing two-way ANOVA with repeated measures. The results of the present study were as follows: 1) CPK was tended to be lower in the cryotherapy test than the control test from 48 hrs after exercise. 2) Soreness rating was significantly lower in cryotherapy test than control test at 72 hrs after the exercise. 3) Long jump with one leg standing of the cryotherapy test increased more than the control test at 72 hrs after the exercise. It was concluded that the cryotherapy was beneficial to relieve DOMS and to maintain the physical fitness after isokinetic and concentric exercise.

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