운동 강도의 차이가 회복기 혈중 랩틴 농도에 미치는 영향
The Effects of Exercise Indensity on plasma leptin concentration in exercise recovery
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운동 강도의 차이가 회복기 혈중 랩틴 농도에 미치는 영향. 운동과학, 제13권 제1호, 35-42, 2004. 본연구의 목적은 운동의 강도가 혈중 랩틴에 미치는 영향을 알아보는 것이다. 8명의 건강한 남자대학생을 대상으로 최대산소섭취량의 50% (LT)와 75% (HT)의 운동강도로 자전거타기를 실시하였다. 이때 운동량은 두강도 모두 약 250 kcal가 되게 하였다. 연구결과 혈중 랩틴 농도는 운동강도별 유의한 차이는 나타나지 않았으나, HT에서 운동전에 비해 유의하게 감소한 것으로 나타났다(p<.05). EPOC는 두강도 모두 운동후 유의하게 높게 나타났고, 운동직후 LT에 비해 HT에서 유의하게 높게 나타났다(p<.05). 혈중 인슐린 농도는 시간별, 운동강도별 유의한 차이가 나타나지 않았다. 혈중 유리지방산과 글루코스 수준은 HT에서만 회복시 유의하게 높게 나타났다(p<.05). 혈중 글리세롤 수준은 두 운동강도 모두에서 운동직후 유의하게 높게 나타났다 (p<.05). 그러나 운동강도별 차이는 없었다. 혈중 젖산 수준은 운동후 두강도 모두 유의하게 높게 나타났고, HT에서 LT보다 높게 나타났다(p<.05). 이러한 결과를 통해 일회성 운동후 회복기 3시간 동안 동일한 운동량의 운동시 높은 강도의 운동이 혈중 랩틴 농도에 유의한 영향을 미치는 것을 알 수 있다.
Abstract
The Effects of Exercise Indensity on plasma leptin concentration in exercise recovery. Exercise Science, 13(1): 35-42, 2004. leptin is an adipocyte-derived hormone that has been shown to regulate body weight and thermogenesis in human and animal (Kraemer et al, 2000). The objective of this study was to investigate the effects of exercise intensity on plasma leptin responses. The 8 college male students were participated in acute bout exercise with two different intensities; 50% (LT) and 75% (HT) of maximal oxygen consumption. The energy expenditure was equal to both intensity (≒ 250 kcal). Plasma leptin levels were significantly reduced after HT (pre > 120 min> 180 min), but there was no significant difference between HT and LT. EPOC were significantly increased after acute bout exercise with two different intensity, and HT was higher than LT. Plasma insulin levels were not significantly changed in two groups. Plasma FFA levels were significantly increased after acute bout exercise only HT (p<.05). Plasma glycerol levels were significantly increased after acute bout exercise with two different intensities (p<.05). Plasma glucose levels were significantly increased after acute bout exercise only HT (pre<post, 15min, p<.05). Plasma lactate levels were significantly increased after acute bout exercise with two intensity group, and HT was higher than LT. These data indicate that high intensity exercise did significantly affect plasma leptin levels during the 3h-recovery.
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