Miyashita M
Division of Sports Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan.
Int J Obes (Lond). 2008 Aug;32(8):1271-8. doi: 10.1038/ijo.2008.73. Epub 2008 May 27.
There is limited information regarding the effects of short (<10 min) bouts of activity on postprandial lipaemia and no studies are available regarding the effects of short bouts of activity on postprandial lipaemia in obese men. The objective of this study was to compare the effects of accumulating ten, 3-min bouts of exercise versus one 30 min bout of exercise on postprandial serum triacylglycerol (TAG) concentrations in obese men.
Each subject completed three 2-day trials at least 1 week apart in a randomized, repeated-measures design. On day 1, subjects rested (no exercise) or cycled at 60% of maximum heart rate in either ten, 3-min bouts (30 min rest between each), or one continuous 30-min bout. On day 2 of each trial, after an overnight fast, the subjects consumed a standardized test meal for breakfast. Venous blood samples were obtained in the fasted state (0 h), and 2, 4 and 6 h postprandially on day 2.
Eight sedentary men (age: 27+/-2 years) with body mass index between 25 and 37 kg/m(2).
Postprandial TAG, non-esterified fatty acids, 3-hydroxybutyrate, insulin and glucose were determined.
Total area under the postprandial serum TAG concentrations versus time curve was 18% (P=0.042) and 15% (P=0.032) lower throughout day 2 of both the accumulated exercise trial and the continuous exercise trial, respectively, compared with the control trial with little difference between exercise trials.
At 30 min of moderate cycling (0.87 MJ per 30 min) accumulated in short bouts is equally effective in reducing postprandial serum TAG concentrations as one continuous 30 min bout of cycling in obese men.
关于短时间（<10分钟）运动对餐后血脂的影响，相关信息有限，且尚无关于短时间运动对肥胖男性餐后血脂影响的研究。本研究的目的是比较累积进行十次3分钟运动与一次30分钟运动对肥胖男性餐后血清甘油三酯（TAG）浓度的影响。
每位受试者以随机重复测量设计，至少间隔1周完成三次为期2天的试验。在第1天，受试者休息（不运动）或在最大心率的60%下进行骑行，方式为累积进行十次3分钟运动（每次运动之间休息30分钟）或持续进行一次30分钟运动。在每次试验的第2天，经过一夜禁食后，受试者食用标准化测试餐作为早餐。在禁食状态（0小时）以及第2天餐后2小时、4小时和6小时采集静脉血样。
八名久坐不动的男性（年龄：27±2岁），体重指数在25至37kg/m²之间。
测定餐后TAG、非酯化脂肪酸、3-羟基丁酸、胰岛素和葡萄糖。
与对照试验相比，累积运动试验和持续运动试验第2天全天餐后血清TAG浓度与时间曲线下的总面积分别降低了18%（P=0.042）和15%（P=0.032），运动试验之间差异不大。
对于肥胖男性，短时间累积进行30分钟中等强度骑行（每30分钟0.87兆焦）与持续进行一次30分钟骑行在降低餐后血清TAG浓度方面效果相当。
