Cited by 40Coffee research and impactsSleep and Work-Related FatigueSleep and Wakefulness Research

Dietary caffeine, performance and mood: enhancing and restorative effects after controlling for withdrawal reversal

James, Jack E., Gregg, M. Elizabeth, Kane, Marian, Harte, Frances·2005·Neuropsychobiology

Abstract

This study aimed to determine whether sustained (i.e. dietary) use of caffeine has net effects on performance and mood compared with sustained abstinence, and whether dietary caffeine restores performance and mood adversely affected by sleep restriction. Participants (n = 96) alternated weekly between ingesting placebo and caffeine (1.75 mg/kg) three times daily for 4 consecutive weeks, while either rested or sleep restricted. Performance involved either a single task requiring sustained vigilance or a varied battery of brief psychomotor and cognitive tasks, and mood was assessed using the Profile of Mood States. Caffeine had no significant net enhancing effects for either performance or mood when participants were rested, and produced no net restorative effects when performance and mood were degraded by sleep restriction.

Integrity signals

Registry

Crossref · 10.1159/000086172

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38 of 38 references verified0 citation errors · 0 not checkable

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  • Studies that have employed long-term caffeine withdrawal methodology have consistently failed to find cognitive enhancing effects of acute caffeine.

    “In fact, studies that have employed long-term caffeine withdrawal methodology have consistently failed to find cognitive enhancing effects of acute caffeine (78–82).”

    From The Safety of Ingested Caffeine: A Comprehensive Review (2017) · cites this paper as [78]

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Authors
James, J. E., Gregg, M. E., Kane, M., & Harte, F.
Affiliations
Ollscoil na Gaillimhe – University of Galway (IE)
Venue
Neuropsychobiology
Publisher
S. Karger AG
Published
2005
Volume
52
Issue
1
Pages
1-10
ISSN
  • 0302-282X (ISSN-L)
  • 1423-0224
OpenAlex
W1979789874
Cited by
40
References
38
Citations by year
2020: 1 · 2019: 1 · 2018: 1 · 2017: 4 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 2 · 2012: 5
FWCI
2.55
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropsychobiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
European Commission
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
dietary caffeine, caffeine withdrawal, caffeine abstinence, sleep restriction, sustained attention, psychomotor performance, cognitive performance, mood, Profile of Mood States, restorative effects
MeSH terms
Adolescent, Adult, Affect, Central Nervous System Stimulants, Arousal, Caffeine, Diet, Female, Humans, Male, Middle Aged, Neuropsychological Tests, Psychomotor Performance, Reaction Time, Saliva, Sex Characteristics, Sleep Deprivation, Substance Withdrawal Syndrome

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