Thackray Alice E, Barrett Laura A, Tolfrey Keith
Paediatric Exercise Physiology Research Group, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UNITED KINGDOM.
Med Sci Sports Exerc. 2016 Mar;48(3):402-11. doi: 10.1249/MSS.0000000000000788.
This study examined the potency of combining acute high-intensity exercise and energy intake restriction on postprandial triacylglycerol concentrations ([TAG]) in healthy girls.
Sixteen 11- to 13-yr-old girls (mean (SD) body mass, 45.1 (7.6) kg; peak oxygen uptake (V˙O2), 43 (6) mL·kg(-1)·min(-1)) completed three 2-d conditions in a counterbalanced crossover design separated by 14 d. On day 1, participants completed 10 × 1-min interval runs (HIIR) or 5 × 1-min interval runs combined with 0.82 (0.19) MJ energy intake restriction (HIIR-ER) or rested (CON). Exercise was completed at 100% maximal aerobic speed determined from an incremental peak V˙O2 test, with 1-min recovery between intervals. On day 2, capillary blood samples were taken in the fasted state and at predetermined intervals throughout the 6.5-h postprandial period. A standardized breakfast and lunch were consumed immediately and 4 h after the fasting sample, respectively.
Based on ratios of the geometric means (95% confidence intervals (CI) for ratios), fasting [TAG] was 16% and 8% lower than CON in HIIR (-24% to -7%; effect size (ES), 0.49; P = 0.002) and HIIR-ER (-17% to 1%; ES, 0.24; P = 0.09), respectively; HIIR was 8% lower than HIIR-ER (-17% to 1%; ES, 0.25; P = 0.08). The total area under the [TAG] versus time curve was 10% and 9% lower than CON in HIIR (-16% to -3%; ES, 0.30; P = 0.01) and HIIR-ER (-15% to -2%; ES, 0.28; P = 0.01), respectively; HIIR-ER and HIIR were similar (-1%; -8% to 6%; P = 0.80).
Manipulations of HIIR and ER reduce postprandial [TAG] in girls. The magnitude of effect was marginally, although not meaningfully, greater after HIIR than that after HIIR-ER.
本研究探讨急性高强度运动与能量摄入限制相结合对健康女孩餐后三酰甘油浓度（[TAG]）的影响。
16名11至13岁女孩（平均（标准差）体重，45.1（7.6）kg；峰值摄氧量（V˙O2），43（6）mL·kg-1·min-1）采用平衡交叉设计，分三个2天的阶段进行，间隔14天。第1天，参与者完成10次1分钟间歇跑（HIIR）或5次1分钟间歇跑并结合0.82（0.19）MJ能量摄入限制（HIIR-ER）或休息（CON）。运动以递增峰值V˙O2测试确定的100%最大有氧速度完成，两次间歇之间休息1分钟。第2天，在空腹状态下以及餐后6.5小时内的预定时间采集毛细血管血样。分别在空腹样本采集后立即和4小时后食用标准化早餐和午餐。
根据几何均值的比值（比值的95%置信区间（CI）），空腹[TAG]在HIIR组（-24%至-7%；效应量（ES），0.49；P = 0.002）和HIIR-ER组（-17%至1%；ES，0.24；P = 0.09）分别比CON组低16%和8%；HIIR组比HIIR-ER组低8%（-17%至1%；ES，0.25；P = 0.08）。[TAG]随时间曲线下的总面积在HIIR组（-16%至-3%；ES，0.30；P = 0.01）和HIIR-ER组（-15%至-2%；ES，0.28；P = 0.01）分别比CON组低10%和9%；HIIR-ER组和HIIR组相似（-1%；-8%至6%；P = 0.80）。
HIIR和ER干预可降低女孩餐后[TAG]。HIIR后的效应幅度略大于HIIR-ER，但无显著差异。
