12주간의 고강도 저항성 운동훈련이 건강한 남성의 혈중 Irisin 농도 및 근기능에 미치는 효과
Effects of 12-Week High-Intensity Resistance Training on Blood Irisin Level and Muscular Function in Healthy Males
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본 연구의 목적은 12주간의 저항성 운동이 건강한 남성의 irisin 수준과 근기능 및 건강에 미치는 영향을 규명하는 것이다. 이 연구를 위하여 건강한 젊은 남성 8명이 12주 동안 웨이트 트레이닝을 실행하였다(1일 90분, 주 6회). Irisin과 testosterone의 수준은 ELISA kits를 이용하여 측정하였다. 체성분 분석은 Inbody 4.0을 이용하였고, 등속성 근기능 측정은 Humac Norm을 이용하여 대퇴부위의 각속도 60 °/s에서 peak torque를 180 °/s와 240 °/s에서 total work done을 측정하였다. 12주간의 운동 전에 비하여 운동 후에 irisin의 레벨은 유의하게 증가하였지만(p=.042, 32%) 운동 후에 testosterone의 수준은 변하지 않았다. 운동 전에 비하여 운동 후에 골격근은 유의하게 증가되었지만(p=.039, 3%) 체지방량은 변화하지 않았다. 대퇴부 근기능의 peak torque는 신전에서 28%, 굴곡에서 52%로 유의하게 증가하였으며 180 °/s의 총 일량은 신전과 굴곡이 각각 44%, 64%로 유의하게 증가하였고, 240 °/s의 총 일량 또한 신전과 굴곡이 각각 37%, 47%로 유의한 증가를 보였다(p=.001). 결론적으로 고강도의 저항성 운동은 혈중 irisin의 수준을 증가시켰고 또한 근력 및 근육량도 함께 증가하였지만 지방량은 변하지 않았다.
Abstract
The purpose of the present study was to examine the effects of 12-week resistance training on blood irisin level and muscular function in healthy males. For this study, 8 healthy males participated in and performed weight training for 12 weeks (90 min/day, 6 times/week). The levels of irisin and testosterone in blood were analyzed using commercial ELISA kits. Inbody 4.0 was used for measuring body composition. Isokinetic muscular function at 60 °/s, 180 °/s and 240 °/s was measured by Humac Norm. The level of irisin was significantly increased, (p=.042, 32%) however the level of testosterone was not changed after training. Skeletal muscle mass was significantly increased (p=.039, 3%) but body fat was not changed. The peak torque at 60 °/s was significantly increased in the leg extensor (28%) and flexor (52%) (p=.001). The total work done at 180 °/s was significantly increased in the leg extensor (44%) and flexor (64%), also 240 °/s was significantly increased in the leg extensor (37%) and flexor (47%) after training (p=.001). In conclusion, 12-week high-intensity resistance training increases the level of irisin and improves muscle strength and mass, however fat mass was not changed.
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