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首页> 外文期刊>Medicine and science in sports and exercise >High oxidation rates from combined carbohydrates ingested during exercise.
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High oxidation rates from combined carbohydrates ingested during exercise.

机译：运动期间摄入的合并碳水化合物有很高的氧化率。

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Studies that have investigated oxidation of a single carbohydrate (CHO) during exercise have reported oxidation rates of up to 1 g x min(-1). Recent studies from our laboratory have shown that a mixture of glucose and sucrose or glucose and fructose ingested at a high rate (1.8 g x min(-1)) leads to peak oxidation rates of approximately 1.3 g x min(-1) and results in approximately 20 to 55% higher exogenous CHO oxidation rates compared with the ingestion of an isocaloric amount of glucose. PURPOSE: The purpose of the present study was to examine whether a mixture of glucose, sucrose and fructose ingested at a high rate would result in even higher exogenous CHO oxidation rates (>1.3 g x min(-1)). METHODS: Eight trained male cyclists (VO2max: 64 +/- 1 mL x kg(-1) BM x min(-1)) cycled on three different occasions for 150 min at 62 +/- 1% VO2max and consumed either water (WAT) or a CHO solution providing 2.4 g x min(-1) of glucose (GLU) or 1.2 g x min(-1) of glucose + 0.6 g x min(-1) of fructose + 0.6 g x min(-1) of sucrose (MIX). RESULTS: High peak exogenous CHO oxidation rates were found in the MIX trial (1.70 +/- 0.07 g x min(-1)), which were approximately 44% higher (P < 0.01) compared with the GLU trial (1.18 +/- 0.04 g x min(-1)). Endogenous CHO oxidation was lower (P < 0.05) in MIX compared with GLU (0.76 +/- 0.12 and 1.05 +/- 0.06 g x min(-1), respectively). CONCLUSION: When glucose, fructose and sucrose are ingested simultaneously at high rates (2.4 g x min(-1)) during cycling exercise, exogenous CHO oxidation rates can reach peak values of approximately 1.7 g x min(-1) and estimated endogenous CHO oxidation is reduced compared with the ingestion of an isocaloric amount of glucose.
机译：研究运动中单一碳水化合物（CHO）氧化的研究报告称氧化速率高达1 g x min（-1）。我们实验室的最新研究表明，以高速率（1.8 gx min（-1））摄入葡萄糖和蔗糖或葡萄糖和果糖的混合物会导致大约1.3 gx min（-1）的峰值氧化速率，并导致大约与摄入等热量的葡萄糖相比，外源CHO氧化速率高20至55％。目的：本研究的目的是检查以高速率摄入的葡萄糖，蔗糖和果糖的混合物是否会导致更高的外源CHO氧化速率（> 1.3 g x min（-1））。方法：八位训练有素的男性自行车手（VO2max：64 +/- 1 mL x kg（-1）BM x min（-1））在三种不同情况下以62 +/- 1％VO2max循环150分钟，并消耗了其中的水（ WAT）或CHO溶液，可提供2.4 gx min（-1）的葡萄糖（GLU）或1.2 gx min（-1）的葡萄糖+ 0.6 gx min（-1）的果糖+ 0.6 gx min（-1）的蔗糖（混合）。结果：在MIX试验中发现高峰值外源CHO氧化速率（1.70 +/- 0.07 gx min（-1）），比GLU试验（1.18 +/- 0.04）高约44％（P <0.01） gx min（-1））。与GLU相比，MIX中的内源CHO氧化更低（P <0.05）（分别为0.76 +/- 0.12和1.05 +/- 0.06 g x min（-1））。结论：在自行车运动中以高速率（2.4 gx min（-1））同时摄取葡萄糖，果糖和蔗糖时，外源性CHO氧化速率可达到约1.7 gx min（-1）的峰值，估计内源性CHO氧化为与摄入等热量的葡萄糖相比减少。

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