Health Psychology Research Unit, School of Psychology, University of Wales College of Cardiff, P.O. Box 901, Cardiff CF1 3YG, UK.
J Psychopharmacol. 1993 Jan;7(2):203-6. doi: 10.1177/026988119300700209.
An experiment was carried out to examine the effects of caffeine and evening meals on sleep and performance, mood and cardiovascular functioning in the early morning of the next day. Forty-eight subjects were assigned to one of the four conditions formed by combining caffeine and meal conditions. Subjects in the caffeine condition were given 3 mg/kg caffeine in de-caffeinated coffee. The caffeine manipulation was double blind. Subjects in the meal condition were given a 3-course meal (∼ 1300 calories). Sleep was assessed by subjective ratings and these showed that both caffeine and consumption of the meal influenced sleep, but that there were no interactions between caffeine and meal conditions. Although caffeine disrupted sleep there was no evidence of performance or mood being impaired the next day. However, blood pressure was still higher the next day in subjects given caffeine the previous evening.
一项实验旨在研究咖啡因和晚餐对次日清晨睡眠、表现、情绪和心血管功能的影响。48 名受试者被分配到由咖啡因和膳食条件组合而成的四种条件之一。咖啡因组的受试者被给予 3 毫克/公斤的咖啡因脱咖啡因咖啡。咖啡因的处理是双盲的。膳食组的受试者被给予三道菜的膳食（约 1300 卡路里）。睡眠通过主观评分进行评估，结果表明咖啡因和膳食都会影响睡眠，但咖啡因和膳食条件之间没有相互作用。尽管咖啡因扰乱了睡眠，但第二天的表现或情绪没有受到损害的证据。然而，前一天晚上给予咖啡因的受试者第二天的血压仍然较高。
