Caffeine, Caffeine Withdrawal and Psychomotor Performance: A Reply to James
نویسندگان
چکیده
منابع مشابه
Caffeine withdrawal: a parametric analysis of caffeine dosing conditions.
Although caffeine is the most widely used behaviorally active drug in the world, caffeine physical dependence has been only moderately well characterized in humans. Four double-blind experiments were conducted in independent groups of healthy participants to assess the conditions under which withdrawal symptoms occur upon cessation of low to moderate doses of caffeine. In experiment 1, there wa...
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In this study, we investigated the impact of a controlled 4-day caffeine withdrawal period on the effect of an acute caffeine dose on endurance exercise performance. Twelve well-trained and familiarized male cyclists, who were caffeine consumers (from coffee and a range of other sources), were recruited for the study. A double-blind placebo-controlled cross-over design was employed, involving f...
متن کاملCaffeine and Exercise Performance
1. Recent, well-controlled studies have established that moderate doses of caffeine ingested 1 h prior to exercise enhance the performance of certain types of endurance exercise in the laboratory. Moderate caffeine doses produce urinary caffeine levels well below the allowable limit, as determined by the International Olympic Committee. The results are specific to well-trained elite or recreati...
متن کاملExercise-Induced Fatigue and Caffeine Supplementation Affect Psychomotor Performance but Not Covert Visuo-Spatial Attention
Fatigue resulting from strenuous exercise can impair cognition and oculomotor control. These impairments can be prevented by administering psychostimulants such as caffeine. This study used two experiments to explore the influence of caffeine administered at rest and during fatiguing physical exercise on spatial attention-a cognitive function that is crucial for task-based visually guided behav...
متن کاملCaffeine Caffeine–A Drug with a Surprise
The first reported caffeine consumers in history were the members of the Galla tribe in Ethiopia, who were enjoying coffee 1000 years ago. In 1819 Friedlieb Ferdinand Runge isolated caffeine for the first time as a pure compound from coffee beans. The first total synthesis of caffeine was accomplished by Emil Fischer in 1895. Despite the extensive consumption of caffeinated nutrients in our dai...
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ژورنال
عنوان ژورنال: Neuropsychobiology
سال: 1995
ISSN: 0302-282X,1423-0224
DOI: 10.1159/000119193