Division of Physical and Health Education, Center for General Education, National Sun Yat-Sen University, Kaohsiung, TAIWAN.
Department of Physical Education, National Taiwan Normal University, Taipei, TAIWAN.
Med Sci Sports Exerc. 2018 Aug;50(8):1687-1696. doi: 10.1249/MSS.0000000000001613.
This study aimed to examine the effects of two exercise regimes on physiological and postprandial lipemic responses.
Thirty-six active men (peak oxygen uptake [V˙O2peak], 46.5 ± 6.4 mL·kg·min) were randomly assigned to a high-intensity interval exercise (HIIE), involving 10 × 60 s cycling at 85% V˙O2peak interspersed with 120 s recovery; a moderate-intensity continuous exercise (MICE), involving 50 min continuous exercise at 65% V˙O2peak; and a nonexercise control (Con). In the next morning after evening exercising, fasting blood samples were obtained. Additional blood samples were obtained 1-4 h after eating a given high-fat meal that based on participants' body mass. Carbohydrate and fat oxidation rates were measured before and after the meal.
After exercise, glucose and insulin concentrations decreased by 33% and 70% in MICE compared with those in HIIE (P = 0.00-0.03). During the 1- to 2-h postprandial periods, the fat oxidation rate increased by 24%-37% in HIIE that that in MICE and Con (P = 0.01-0.03); however, the carbohydrate oxidation rate was not significantly different among the conditions (P = 0.28). During the postprandial period, insulin (P = 0.02-0.04) and triglyceride (P = 0.02-0.03) concentrations were lower in HIIE than those in MICE and Con. No difference was observed in free fatty acid or the total areas under the curve of triglyceride and free fatty acid among the conditions (P = 0.24-0.98).
Acute MICE improved glucose and insulin metabolism immediately after exercise. However, HIIE performed in the evening exerts more favorable effects than MICE for decreasing postprandial insulin and triglyceride levels and increasing fat oxidation in the next morning.
本研究旨在探讨两种运动方式对生理和餐后血脂反应的影响。
36 名活跃男性（峰值摄氧量[V˙O2peak]，46.5±6.4 mL·kg·min）被随机分配到高强度间歇运动（HIIE）组、中强度持续运动（MICE）组和不运动对照组（Con）。HIIE 组包括 10 次 85%V˙O2peak 的自行车骑行，每次骑行 60 秒，穿插 120 秒恢复期；MICE 组包括 50 分钟 65%V˙O2peak 的持续运动；Con 组不运动。在晚上运动后的第二天早上，采集空腹血样。在摄入高脂肪餐 1-4 小时后，根据参与者的体重，再次采集血样。在餐前和餐后测量碳水化合物和脂肪氧化率。
与 HIIE 组相比，MICE 组运动后血糖和胰岛素浓度分别降低了 33%和 70%（P=0.00-0.03）。在 1-2 小时的餐后期间，HIIE 组脂肪氧化率比 MICE 组和 Con 组分别增加了 24%-37%（P=0.01-0.03）；然而，在三种条件下，碳水化合物氧化率没有显著差异（P=0.28）。在餐后期间，HIIE 组胰岛素（P=0.02-0.04）和甘油三酯（P=0.02-0.03）浓度低于 MICE 组和 Con 组。三种条件下游离脂肪酸或甘油三酯和游离脂肪酸的总曲线下面积没有差异（P=0.24-0.98）。
急性 MICE 运动可在运动后即刻改善血糖和胰岛素代谢。然而，与 MICE 相比，晚上进行的 HIIE 运动在次日早晨降低餐后胰岛素和甘油三酯水平以及增加脂肪氧化方面具有更有利的效果。
