Effects of fluid ingestion on cognitive function after heat stress or exercise-induced dehydration
Effects of fluid ingestion on cognitive function after heat stress or exercise-induced dehydration
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DOI：
10.1016/s0167-8760(01)00142-8
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发表时间：
2001-11-01
影响因子：
3
通讯作者：
Raphel, C
中科院分区：
文献类型：
--
作者：
Cian, C;Barraud, PA;Raphel, C
本研究调查了热暴露、运动性脱水和液体摄入对认知能力的影响。7名不适应高温的健康男性通过受控被动暴露于高温（H，两次）或跑步机运动（E，两次）保持水分充足或脱水，直至体重减轻2.8%。在完成1小时的恢复期后，受试者饮用含有50 g l（-1）葡萄糖和1.34 g l（-1）NaCl的溶液，其水体积相当于脱水引起的体重减轻的100%。(H1和E1）或维持液体缺乏水平（H 0，E0）。在E0、H 0和对照条件下，受试者饮用含有等量葡萄糖的100 ml水溶液。在脱水阶段后30分钟和液体摄入后2小时进行心理测试。两种脱水条件均损害认知能力（即感知辨别力、短期记忆）以及疲劳的主观估计，两种方法之间无任何相关差异。到液体缺乏后3.5小时，脱水（H 0和E0）不再产生任何不良影响，尽管受试者感到越来越疲倦。因此，液体摄入（HI和El）对认知变量没有有益的影响。然而，长期记忆提取受损的控制和脱水的情况下，而没有减少的表现在液体摄入条件（H1，E1）。(C)2001 Elsevier Science B. V.保留所有权利。
This study investigated the effects of heat exposure, exercise-induced dehydration and fluid ingestion on cognitive performance. Seven healthy men, unacclimatized to heat, were kept euhydrated or were dehydrated by controlled passive exposure to heat (H, two sessions) or by treadmill exercise (E, two sessions) up to a weight loss of 2.8%. On completion of a 1-h recovery period, the subjects drank a solution containing 50 g l(-1) glucose and 1.34 g l(-1) NaCl in a volume of water corresponding to 100% of his body weight loss induced by dehydration. (H1 and E1) or levels of fluid deficit were maintained (H0, E0). In the E0, H0 and control conditions, the subject drank a solution containing the same quantity of glucose diluted in 100 ml of water. Psychological tests were administered 30 min after the dehydration phase and 2 h after fluid ingestion. Both dehydration conditions impaired cognitive abilities (i.e. perceptive discrimination, short-term memory), as well as subjective estimates of fatigue, without any relevant differences between the methods. By 3.5 h after fluid deficit, dehydration (H0 and E0) no longer had any adverse effect, although the subjects felt increasingly tired. Thus, there was no beneficial effect of fluid ingestion (HI and El) on the cognitive variables. However, long-term memory retrieval was impaired in both control and dehydration situations, whereas there was no decrement in performance in the fluid ingestion condition (H1, E1). (C) 2001 Elsevier Science B.V. All rights reserved.