During short-term recovery, postexercise glucose-fructose coingestion can accelerate total glycogen repletion and augment recovery of running capacity. It is unknown if this advantage translates to cycling, or to a longer (e.g., overnight) recovery. Using two experiments, the present research investigated if postexercise glucose-fructose coingestion augments exercise capacity following 4-hr (short experiment; n = 8) and 15-hr (overnight experiment; n = 8) recoveries from exhaustive exercise in trained cyclists, compared with isocaloric glucose alone. In each experiment, a glycogen depleting exercise protocol was followed by a 4-hr recovery, with ingestion of 1.5 or 1.2 g·kg-1·hr-1 carbohydrate in the short experiment (double blind) and the overnight experiment (single blind), respectively. Treatments were provided in a randomized order using a crossover design. Four or fifteen hours after the glycogen depletion protocol, participants cycled to exhaustion at 70% Wmax or 65% Wmax in the short experiment and the overnight experiment, respectively. In both experiments there was no difference in substrate oxidation or blood glucose and lactate concentrations between treatments during the exercise capacity test (trial effect, p > .05). Nevertheless, cycling capacity was greater in glucose + fructose versus glucose only in the short experiment (28.0 ± 8.4 vs. 22.8 ± 7.3 min, d = 0.65, p = .039) and the overnight experiment (35.9 ± 10.7 vs. 30.6 ± 9.2 min, d = 0.53, p = .026). This is the first study to demonstrate that postexercise glucose-fructose coingestion enhances cycling capacity following short-term (4 hr) and overnight (15 hr) recovery durations. Therefore, if multistage endurance athletes are ingesting glucose for rapid postexercise recovery then fructose containing carbohydrates may be advisable.

中文翻译：

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与等热量葡萄糖相比，运动后葡萄糖 - 果糖共同摄取可在短期和夜间从力竭运动恢复期间增强循环能力。

在短期恢复期间，运动后葡萄糖 - 果糖共同摄入可以加速总糖原补充并增加跑步能力的恢复。尚不清楚这种优势是否会转化为循环或更长的（例如，过夜）恢复。通过两个实验，本研究调查了运动后葡萄糖 - 果糖共同摄取是否会在 4 小时（短期实验；n = 8）和 15 小时（过夜实验；n = 8）后从训练有素的自行车手的彻底运动中恢复后增强运动能力，比较单独使用等热量葡萄糖。在每个实验中，在消耗糖原的运动方案之后进行 4 小时的恢复，在短期实验（双盲）和过夜实验（单盲）中摄入 1.5 或 1.2 g·kg-1·hr-1 碳水化合物， 分别。使用交叉设计以随机顺序提供治疗。糖原消耗方案四或十五小时后，参与者在短期实验和过夜实验中分别以 70% Wmax 或 65% Wmax 循环至精疲力竭。在这两个实验中，运动能力测试期间处理之间的底物氧化或血糖和乳酸浓度没有差异（试验效果，p > .05）。然而，仅在短期实验（28.0 ± 8.4 对 22.8 ± 7.3 分钟，d = 0.65，p = .039）和过夜实验（35.9 ± 10.7 对 30.6 ± 9.2）中，葡萄糖 + 果糖的循环能力比葡萄糖更大分钟，d = 0.53，p = .026）。这是第一项证明运动后葡萄糖 - 果糖共同摄取可在短期（4 小时）和过夜（15 小时）恢复持续时间后增强循环能力的研究。因此，如果多阶段耐力运动员摄入葡萄糖以实现运动后的快速恢复，则建议使用含有果糖的碳水化合物。