Péronnet F, Adopo E, Massicotte D, Hillaire-Marcel C
Université de Montréal, Canada.
Int J Sports Med. 1992 Oct;13 Suppl 1:S123-5. doi: 10.1055/s-2007-1024614.
This presentation summarizes the experimental data on the oxidation of exogenous substrates using isotopic labelling: glucose, fructose, maltodextrins, glucose polymers, starch and FFA. The two main determining factors for the oxidation of exogenous substrates are in this order: power output and amount of ingested substrates. The largest oxidation of exogenous substrate is observed for glucose, maltodextrins, Polycose, and starch. For exercises of one hour duration or more, the average rate of oxidation of these compounds can reach up to 0.5 g/min, which agrees with the indirect estimation of Coyle et al. Fructose is oxidized at a lower rate, except when it is taken before the exercise period. FFA are only oxidized to a small extent.
本报告总结了使用同位素标记法对外源底物（葡萄糖、果糖、麦芽糊精、葡萄糖聚合物、淀粉和游离脂肪酸）氧化的实验数据。外源底物氧化的两个主要决定因素依次为：功率输出和摄入底物的量。观察到葡萄糖、麦芽糊精、聚葡萄糖和淀粉的外源底物氧化量最大。对于持续一小时或更长时间的运动，这些化合物的平均氧化速率可达0.5克/分钟，这与科伊尔等人的间接估计结果一致。果糖的氧化速率较低，除非在运动前摄入。游离脂肪酸仅在小程度上被氧化。
