The authors tested the hypothesis that perception of carbohydrate (CHO) availability augments exercise capacity in conditions of reduced CHO availability. Nine males completed a sleep-low train model comprising evening glycogen-depleting cycling followed by an exhaustive cycling protocol the next morning in the fasted state (30 min steady state at 95% lactate threshold followed by 1-min intervals at 80% peak power output until exhaustion). After the evening depletion protocol and prior to sleeping, subjects consumed (a) a known CHO intake of 6 g/kg body mass (TRAIN HIGH) or (b) a perceived comparable CHO intake but 0 g/kg body mass (PERCEPTION) or a known train-low condition of 0 g/kg body mass (TRAIN LOW). The TRAIN HIGH and PERCEPTION trials were conducted double blind. During steady state, average blood glucose and CHO oxidation were significantly higher in TRAIN HIGH (4.01 ± 0.56 mmol/L; 2.17 ± 0.70 g/min) versus both PERCEPTION (3.30 ± 0.57 mmol/L; 1.69 ± 0.64 g/min, p < .05) and TRAIN LOW (3.41 ± 0.74 mmol/L; 1.61 ± 0.59 g/min, p < .05). Exercise capacity was significantly different between all pairwise comparisons (p < .05), where TRAIN LOW (8 ± 8 min) < PERCEPTION (12 ± 6 min) < TRAIN HIGH (22 ± 9 min). Data demonstrate that perception of CHO availability augments high-intensity intermittent exercise capacity under sleep-low, train-low conditions, though this perception does not restore exercise capacity to that of CHO consumption. Such data have methodological implications for future research designs and may also have practical applications for athletes who deliberately practice elements of training in CHO-restricted states.

中文翻译：

---

在睡眠不足、训练不足的情况下，对碳水化合物可用性的感知增强了高强度间歇性运动能力。

作者检验了这样一个假设，即在 CHO 可用性降低的情况下，对碳水化合物 (CHO) 可用性的感知会增加运动能力。九名男性完成了一个低睡眠训练模型，包括晚上消耗糖原的循环，然后在第二天早上在禁食状态下进行详尽的循环协议（在 95% 乳酸阈值下稳定 30 分钟，然后在 80% 峰值功率输出下间隔 1 分钟）直到筋疲力尽）。在晚上消耗方案之后和睡觉之前，受试者消耗 (a) 已知 CHO 摄入量为 6 g/kg 体重（训练高）或 (b) 感知可比较的 CHO 摄入量但 0 g/kg 体重（PERCEPTION）或已知的 0 g/kg 体重 (TRAIN LOW) 的低训练条件。TRAIN HIGH 和 PERCEPTION 试验是双盲进行的。在稳定状态下，TRAIN HIGH (4.01 ± 0.56 mmol/L; 2.17 ± 0.70 g/min) 的平均血糖和 CHO 氧化显着高于 PERCEPTION (3.30 ± 0.57 mmol/L; 1.69 ± 0.64 g/min, p < .05)和训练低（3.41 ± 0.74 mmol/L；1.61 ± 0.59 g/min，p < .05）。所有成对比较之间的运动能力显着不同 (p < .05)，其中训练低 (8 ± 8 分钟) < 感知 (12 ± 6 分钟) < 训练高 (22 ± 9 分钟)。数据表明，在睡眠不足、训练不足的情况下，对 CHO 可用性的感知增强了高强度间歇性运动能力，尽管这种感知不会将运动能力恢复到消耗 CHO 的能力。