Mellick Paul F, Feger Bryan J, Oberlin Douglas J, Davis Paul G, Wideman Laurie
Department of Health and Human Performance, The University of St. Thomas , St. Paul, MN, USA.
Department of Psychiatry and Behavioral Sciences, Duke University Medical Center , Durham, NC, USA.
J Sports Sci Med. 2017 Mar 1;16(1):69-76. eCollection 2017 Mar.
The purpose of the study was to examine the effect of high-intensity exercise and carbohydrate supplementation (CHO) on plasma visfatin. On 2 separate days, 10 sprint-trained males (age = 26.4 ± 5.3 yr; Ht = 1.77 ± 0.03 m; Wt = 78.78 ± 9.10 kg; BF% = 13.96 ± 7.28%) completed 4, 3-min bouts of cycling at 50% mean anaerobic power, with 6 min of rest between bouts. On CHO day, subjects ingested 50g of CHO 30 min before exercise. On control day, subjects ingested a sugar-free drink (CON) 30 min before exercise. Blood was drawn before supplementation, 15 min before exercise, before and after each exercise bout, and 15 and 30 min post exercise. Visfatin, glucose, and insulin were determined. Truncal fat was assessed by dual energy x-ray. Visfatin was not significantly different between treatments (CHO vs CON) at any time point (p = 0.163), and was not significantly altered by exercise (p = 0.692). Insulin [25.65 vs 8.35 mU/l, CHO vs CON, respectively] and glucose [138.57 vs 98.10 mg/dl, CHO vs CON, respectively] were significantly elevated after CHO ingestion and remained elevated throughout the first half of exercise. Baseline visfatin was significantly correlated with truncal fat (r = 0.7782, p < 0.05). Visfatin was correlated to truncal fat in sprint-trained males, but was not altered by exercise or CHO supplementation.
本研究的目的是探讨高强度运动和碳水化合物补充（CHO）对血浆内脂素的影响。在两个不同的日子里，10名短跑训练的男性（年龄 = 26.4 ± 5.3岁；身高 = 1.77 ± 0.03米；体重 = 78.78 ± 9.10千克；体脂百分比 = 13.96 ± 7.28%）以平均无氧功率的50%完成4组3分钟的骑行，每组之间休息6分钟。在CHO日，受试者在运动前30分钟摄入50克CHO。在对照日，受试者在运动前30分钟摄入无糖饮料（CON）。在补充前、运动前15分钟、每次运动前后以及运动后15分钟和30分钟采集血液。测定内脂素、葡萄糖和胰岛素。通过双能X射线评估躯干脂肪。在任何时间点，两种处理（CHO与CON）之间的内脂素均无显著差异（p = 0.163），且运动对内脂素无显著影响（p = 0.692）。摄入CHO后，胰岛素[分别为25.65 vs 8.35 mU/l，CHO与CON]和葡萄糖[分别为138.57 vs 98.10 mg/dl，CHO与CON]显著升高，并在运动的前半段一直保持升高。基线内脂素与躯干脂肪显著相关（r = 0.7,782，p < 0.05）。在短跑训练的男性中，内脂素与躯干脂肪相关，但不受运动或CHO补充的影响。
