School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, United Kingdom.
Med Sci Sports Exerc. 2013 Jul;45(7):1277-84. doi: 10.1249/MSS.0b013e31828452c1.
Acute moderate-intensity exercise reduces postprandial lipemia in boys. However, the effect of high-intensity exercise has not been investigated. This study examined the effect of low-volume, high-intensity interval running (HIIR) on postprandial plasma triacylglycerol (TAG) concentrations.
Fifteen healthy, active boys (means ± SD; age = 11.8 ± 0.4 yr, body mass = 42.8 ± 8.0 kg, peak oxygen uptake [VO2] = 55 ± 6 mL · kg(-1) · min(-1)) completed two 2-d trials in a counterbalanced, crossover design separated by 14 d. On day 1, participants rested (CON) or completed 10 × 1 min running intervals at 100% maximal aerobic speed, determined from an incremental peak VO2 test, with 1 min recovery between intervals (HIIR). On day 2, capillary blood samples were taken in the fasted state and at predetermined intervals throughout the 6.5-h postprandial period while participants rested. A standardized breakfast was consumed at 0800 h, immediately after the fasting sample, and a standardized lunch meal was consumed at 1200 h.
Differences in fasting plasma TAG concentration were small to moderate (95% confidence interval [CI] = -0.11 to 0.01, effect size [ES] = 0.40). Postprandial TAG concentration was lower during HIIR compared with CON (95% CI = -0.19 to -0.02, ES = 0.58). The total area under the TAG concentration versus time curve was lower after HIIR compared with CON (5.2 ± 1.1 vs 5.8 ± 1.5 mmol(-1) · L 6.5 h; 95% CI = -1.18 to -0.12, ES = 0.50).
This is the first study to show that low-volume HIIR attenuates postprandial TAG concentration in healthy, active 11- to 12-yr-old boys.
急性中等强度运动可降低男孩的餐后血脂。然而，高强度运动的效果尚未得到研究。本研究旨在检验低容量高强度间歇跑（HIIR）对餐后血浆三酰甘油（TAG）浓度的影响。
15 名健康活跃的男孩（平均值±标准差；年龄=11.8±0.4 岁，体重=42.8±8.0kg，峰值摄氧量[VO2]=55±6mL·kg(-1)·min(-1)）以交叉设计的方式在 14 天的间隔内完成了两项 2 天的试验。第 1 天，参与者休息（CON）或完成 10×1 分钟的跑步间隔，速度为递增峰值 VO2 测试中确定的 100%最大有氧速度，间隔间休息 1 分钟（HIIR）。第 2 天，参与者空腹状态下以及餐后 6.5 小时内的预定时间间隔内采集毛细血管血样，同时休息。标准化早餐于 0800h 食用，即空腹样本后立即食用，标准化午餐于 1200h 食用。
空腹时血浆 TAG 浓度的差异较小（95%置信区间[CI]为-0.11 至 0.01，效应大小[ES]为 0.40）。与 CON 相比，HIIR 期间餐后 TAG 浓度较低（95%CI=-0.19 至-0.02，ES=0.58）。与 CON 相比，HIIR 后 TAG 浓度时间曲线下总面积较低（5.2±1.1 与 5.8±1.5mmol·L·6.5h；95%CI=-1.18 至-0.12，ES=0.50）。
这是第一项表明低容量 HIIR 可降低健康活跃的 11 至 12 岁男孩餐后 TAG 浓度的研究。
