Andersen Eivind, Høstmark Arne T
Department of Sport Medicine, Norwegian School of Sport Sciences, Oslo, Norway.
J Strength Cond Res. 2007 May;21(2):487-91. doi: 10.1519/R-20105.1.
Postprandial blood glucose and insulin levels are both risk factors for developing obesity, type-2 diabetes, and coronary heart diseases. To date, research has shown that a single bout of moderate- to high-intensity aerobic exercise performed <or=24 hours before a carbohydrate ingestion has a positive effect on the postprandial glucose and insulin response, but the reports on the effect of a single bout of resistance exercise are scarce. The purpose of this study was to examine if a bout of resistance exercise performed 14 hours before ingestion of a carbohydrate-rich meal might reduce the postprandial increment in blood glucose and plasma insulin concentration. Ten healthy, strength-trained, young men participated in a meal and resistance exercise experiment. All subjects ingested a carbohydrate-rich meal (1 g carbohydrate per kg body weight) after fasting for 12 hours either with no exercise the preceding 3 days or after a bout of resistance exercise performed 14 hours earlier. Blood glucose and plasma insulin were measured every 15 and 30 minutes, respectively, for 2 hours. The postprandial blood glucose response measured as the peak value, the slope (from time 0 to peak value), and the incremental area under the curve 0-60 min (IAUC(0-60 min)) was significantly (p <or= 0.05) reduced 14 hours after the resistance exercise compared with the control experiment (no exercise). However, total IAUC was not significantly influenced by a bout of previous resistance exercise. Also, the plasma insulin response did not differ between the 2 experiments. From the present study it would appear that a bout of resistance exercise can reduce the postprandial glucose elevation for at least 14 hours.
餐后血糖和胰岛素水平都是导致肥胖、2型糖尿病和冠心病的危险因素。迄今为止，研究表明，在摄入碳水化合物前≤24小时进行单次中高强度有氧运动，对餐后血糖和胰岛素反应有积极影响，但关于单次抗阻运动效果的报道较少。本研究的目的是检验在摄入富含碳水化合物的餐食前14小时进行一次抗阻运动是否能降低餐后血糖和血浆胰岛素浓度的升高。10名健康、经过力量训练的年轻男性参与了一项饮食和抗阻运动实验。所有受试者在禁食12小时后摄入富含碳水化合物的餐食（每千克体重1克碳水化合物），要么在之前3天没有运动，要么在14小时前进行一次抗阻运动之后。分别在2小时内每隔15分钟和30分钟测量血糖和血浆胰岛素。与对照实验（无运动）相比，抗阻运动14小时后，以峰值、斜率（从0时间点到峰值）和曲线下0至60分钟增量面积（IAUC(0 - 60 min)）衡量的餐后血糖反应显著降低（p≤0.05）。然而，总的IAUC并未受到之前一次抗阻运动的显著影响。此外，两个实验之间的血浆胰岛素反应没有差异。从本研究来看，一次抗阻运动似乎可以使餐后血糖升高至少降低14小时。
