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Original Paper

Dietary Caffeine, Performance and Mood: Enhancing and Restorative Effects after Controlling for Withdrawal Reversal

James J.E. · Gregg M.E. · Kane M. · Harte F.

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National University of Ireland, Galway, Ireland

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Neuropsychobiology 2005;52:1–10

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: June 27, 2005
Issue release date: June 2005

Number of Print Pages: 10
Number of Figures: 1
Number of Tables: 2

ISSN: 0302-282X (Print)
eISSN: 1423-0224 (Online)

For additional information: https://www.karger.com/NPS

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.

© 2005 S. Karger AG, Basel


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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: June 27, 2005
Issue release date: June 2005

Number of Print Pages: 10
Number of Figures: 1
Number of Tables: 2

ISSN: 0302-282X (Print)
eISSN: 1423-0224 (Online)

For additional information: https://www.karger.com/NPS


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