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On the one hand, caffeine effects appear to be detrimental to short-term memory, working memory included, whereas the effects are somewhat positive for memory over the long term (for example, remembering something better many days later if caffeine was ingested during encoding as well as retrieval, as opposed to no caffeine [7]). Many of the ...
The potential benefits of caffeine are increased focus and reaction time, reduced perceived effort, and faster sprint performance. It blocks tiredness-causing adenosine from receptors in the brain.
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class and is the most commonly consumed psychoactive substance globally. [9] [10] It is mainly used for its eugeroic (wakefulness promoting), ergogenic (physical performance-enhancing), or nootropic (cognitive-enhancing) properties.
For reference, a brewed 8oz (227ml) cup of coffee contains ~95 mg of caffeine (per USDA). [6] According to the Diagnostic and Statistical Manual of Mental Disorders, caffeine overdose can result in a state of excessive stimulation of the central nervous system and the essential feature of Caffeine Intoxication is the recent consumption of caffeine.
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Cardiovascular effects can range from increased heart rate and reactivity to severe cardiac arrhythmia. [10] The cognitive effects of caffeine include increased performance in memory, attention, and text reading. [11] The physical effects of caffeine include lowered sensations of pain, less perceived effort, and increased muscle strength and ...
College students often drink coffee as their source of caffeine. 2-4 cups of coffee at night can increase the time it takes to fall asleep to nearly twice the normal amount. The average time takes to fall asleep is roughly 6.3 minutes, but with caffeine this time is increased to 12.1 minutes. [ 24 ]
The health effects of coffee include various possible health benefits and health risks. [ 1 ] A 2017 umbrella review of meta-analyses found that drinking coffee is generally safe within usual levels of intake and is more likely to improve health outcomes than to cause harm at doses of 3 or 4 cups of coffee daily.