PMID: 11919004Mar 29, 2002Paper

Maximum cognitive performance and physiological time trend measurements after caffeine intake

Brain Research. Cognitive Brain Research
Chrysoula Kourtidou-PapadeliOlympia Guiba-Tziampiri

Abstract

The effect of caffeine on the central nervous system and cardiorespiratory system was tested under resting conditions and while undertaking a multitask performance test. The subjects abstained from caffeine for a week before the study. Each subject performed the test after oral administration of 90 and 250 mg of caffeine on two separate days. Sum of Squares was recorded during the whole period of the study. Heart rate (HR) and respiration rates (RR) were continuously recorded and blood pressure (BP) was recorded before and after each stage of the experiment (Test(0), Test(1), Test(2), Test(3)). Sixteen healthy volunteers participated in the study divided into three groups: Group A, non-smokers and non-coffee drinkers; Group B, smokers and coffee drinkers; and Group C, non-smokers and coffee drinkers. Comparison of the performance of each stage with the resting conditions revealed statistically significant differences of group B compared to the other two groups and no significant differences between Groups A and C in both doses of caffeine. Non-coffee drinkers needed a low dose of caffeine for their optimal performance while a higher dose significantly increased their blood pressure. Coffee drinkers and smokers needed a higher d...Continue Reading

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Citations

Nov 8, 2006·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Christos PapadelisKonstantinos Pappas
Nov 18, 2014·Nutrition Reviews·Lindsay B BakerAsker E Jeukendrup

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