Carbohydrate intake improves cognitive performance of stress-prone individuals under controllable laboratory stress
Carbohydrate intake improves cognitive performance of stress-prone individuals under controllable laboratory stress
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DOI：
10.1017/s0007114599001713
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发表时间：
1999-12-01
影响因子：
3.6
通讯作者：
Bachman, M
中科院分区：
文献类型：
--
作者：
Markus, CR;Panhuysen, G;Bachman, M
人们发现，在承受压力后，认知表现会下降，尤其是容易受到压力的受试者。本研究调查了富含碳水化合物、缺乏蛋白质（CR/PP）的饮食是否可以改善易受压力的受试者在暴露于急性实验室压力后的表现，这种饮食可能会由于可用色氨酸的增加而增强易受压力的受试者的大脑血清素功能。年龄在 19 至 26 岁之间的 22 名高压力倾向 (HS) 受试者和 21 名低压力倾向 (LS) 受试者在可控和不可控压力后执行记忆扫描任务，遵循 CR/PP 饮食或富含蛋白质、缺乏碳水化合物 (PR/CP) 等能量饮食。无法控制的压力会降低控制感（F（1,38）9.30；P = 0.004），而脉搏率和皮肤电导率在两项压力任务后都会增加（F（1,38）78.34；P = 0.0005和F（1,37）83.16；P = 0.0004）。饮食、压力倾向和压力可控性相互作用（F(1,36) 9.46；P = 0.004），使得 HS 受试者的 CR/PP 饮食表现优于 PR/CP 饮食，但前提是压力可控。由于 CR/PP 饮食被发现可以增加血浆色氨酸：大中性氨基酸的比例，表明大脑色氨酸的可用性增加，因此血清素水平更高，因此在可控的实验室压力后，HS 受试者的大脑血清素的可用性可能会增加。
Cognitive performance has been found to decline after exposure to stress, particularly in stress-prone subjects. The present study investigated whether a carbohydrate-rich, protein-poor (CR/PP) diet, which may enhance cerebral serotonin function in stress-prone subjects due to increases in the available tryptophan, improves the performance of stress-prone subjects after exposure to acute laboratory stress. Twenty-two high-stress-prone (HS) subjects and twenty-one low-stress-prone (LS) subjects aged between 19 and 26 years performed a memory scanning task after controllable and uncontrollable stress, following either a CR/PP diet or a protein-rich, carbohydrate-poor (PR/CP) isoenergetic diet. Uncontrollable stress reduced feelings of control (F(1,38) 9.30; P = 0.004), whereas pulse rate and skin conductance increased after both stress tasks (F(1,38) 78.34; P = 0.0005 and F(1,37) 83.16; P = 0.0004). Diet, stress-proneness and stress-controllability interacted (F(1,36) 9.46; P = 0.004) in such a way that performance in HS subjects was better with the CR/PP diet than with the PR/CP diet, but only after controllable stress. As the CR/PP diet has been found to increase the plasma tryptophan:large neutral amino acids ratio, indicating an increased availability of cerebral tryptophan and, thus, higher serotonin levels, it appears that there may be an increased availability of brain serotonin in HS subjects after controllable laboratory stress.