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Effects of medium-chain triaclyglycerol ingested with carbohydrate on metabolism and exercise performance.

机译:摄入碳水化合物的中链甘油三酸酯对代谢和运动表现的影响。

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摘要

The effects of ingesting different amounts of medium-chain triacylglycerol (MCT) and carbohydrate (CHO) on gastric symptoms, fuel metabolism, and exercise performance were measured in 9 endurance-trained cyclists. Participants, 2 hr after a standardized lunch, cycled for 2 hr at 63% of peak oxygen consumption and then performed a simulated 40-km time trial (Ttrial). During the rides, participants ingested either 10% 14C-glucose (GLU), 10% 14C-GLU + 1.72% MCT (LO-MCT), or 10% 14C-GLU +3.44% MCT (HI-MCT) solutions: 400 ml at the start of exercise and then 100 ml every 10 min. MCT ingestion did not affect gastrointestinal symptoms. It only raised serum free fatty acid (FFA) and beta-hydroxybutyrate concentrations. Higher FFA and beta-hydroxybutyrate concentrations with MCT ingestion did not affect fuel oxidation or T-trial performance. The high CHO content of the pretrial lunch increased starting plasma insulin levels, which may have promoted CHO oxidation despite elevated circulating FFA concentrations with MCT ingestion.
机译:在9名受过耐力训练的自行车手中,测量了摄入不同量的中链三酰甘油(MCT)和碳水化合物(CHO)对胃部症状,燃料代谢和运动表现的影响。参与者在标准午餐后2小时,以峰值氧气消耗量的63%循环2小时,然后进行了40公里的模拟时间试验(试验)。在乘车过程中,参与者摄入10%14C-葡萄糖(GLU),10%14C-GLU + 1.72%MCT(LO-MCT)或10%14C-GLU + 3.44%MCT(HI-MCT)溶液:400毫升在运动开始时,然后每10分钟100毫升。摄入MCT不会影响胃肠道症状。它仅提高血清游离脂肪酸(FFA)和β-羟基丁酸酯的浓度。摄入MCT时,较高的FFA和β-羟基丁酸酯浓度不会影响燃料的氧化或T试验性能。餐前午餐中的高CHO含量增加了起始血浆胰岛素水平,尽管随着MCT摄入循环FFA浓度升高,这可能促进了CHO氧化。

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