Consumption of cocoa flavanols results in acute improvements in mood and cognitive performance during sustained mental effort
Consumption of cocoa flavanols results in acute improvements in mood and cognitive performance during sustained mental effort
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DOI：
10.1177/0269881109106923
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发表时间：
2010-10-01
影响因子：
4.1
通讯作者：
Haskell, Crystal F.
中科院分区：
文献类型：
--
作者：
Scholey, Andrew B.;French, Stephen J.;Haskell, Crystal F.
可可黄烷醇（CF）积极影响生理过程的方式，表明他们的消费可能会改善认知功能的方面。本研究探讨了持续精神需求期间CF消费的急性认知和主观影响。在这项随机、对照、双盲、平衡、三阶段交叉试验中，30名健康成年人饮用含有520 mg、994 mg CF的饮料和匹配对照，饮料之间有三天的洗脱期。评估包括状态焦虑量表和认知需求电池的重复10分钟循环，包括两个连续减法任务（连续三和连续七），快速视觉信息处理（RVIP）任务和“精神疲劳”量表，持续1小时。520 mg和994 mg CF的消耗显著改善了Serial Threes的性能。994 mg CF饮料显著加快了RVIP响应，但也导致了序列七期间的更多错误。自我报告的“精神疲劳”的增加仅通过消耗520 mg CF饮料而显着减弱。这是健康成年人食用CF后急性认知改善的第一份报告。虽然这些作用的机制尚不清楚，但它们可能与CF对内皮功能和血流的已知作用有关。
Cocoa flavanols (CF) positively influence physiological processes in ways that suggest their consumption may improve aspects of cognitive function. This study investigated the acute cognitive and subjective effects of CF consumption during sustained mental demand. In this randomized, controlled, double-blinded, balanced, three period crossover trial 30 healthy adults consumed drinks containing 520 mg, 994 mg CF and a matched control, with a three-day washout between drinks. Assessments included the state anxiety inventory and repeated 10-min cycles of a Cognitive Demand Battery comprising of two serial subtraction tasks (Serial Threes and Serial Sevens), a Rapid Visual Information Processing (RVIP) task and a 'mental fatigue' scale, over the course of 1 h. Consumption of both 520 mg and 994 mg CF significantly improved Serial Threes performance. The 994 mg CF beverage significantly speeded RVIP responses but also resulted in more errors during Serial Sevens. Increases in self-reported 'mental fatigue' were significantly attenuated by the consumption of the 520 mg CF beverage only. This is the first report of acute cognitive improvements following CF consumption in healthy adults. While the mechanisms underlying the effects are unknown they may be related to known effects of CF on endothelial function and blood flow.