Int J Sports Med 2007; 28(10): 891-896
DOI: 10.1055/s-2007-965004
Behavioural Sciences

© Georg Thieme Verlag KG Stuttgart · New York

Effects of Dehydration and Fluid Ingestion on Cognition

P. D. Tomporowski1 , K. Beasman1 , M. S. Ganio2 , K. Cureton1
  • 1Department of Kinesiology, University of Georgia, Athens, GA, USA
  • 2Department of Kinesiology, University of Connecticut, Storrs, CT, USA
Further Information

Publication History

accepted after revision September 21, 2006

Publication Date:
23 April 2007 (online)


The effects of exercise-induced dehydration and fluid ingestion on men's cognitive performance were assessed. Eleven young men attended separate sessions in which each individual cycled in a controlled environment at 60 % of V·O2max for periods of 15, 60, or 120 min without fluid replacement or 120 min with fluid replacement. Immediately following the assigned submaximal exercise period, the participant completed a graded exercise test to voluntary exhaustion. An executive processing test and a short-term memory test were performed prior to and immediately following exercise. Choice-response times during the executive processing test decreased following exercise, regardless of the level of dehydration. Choice-response errors increased following exercise, but only on trials requiring set shifting. Short-term memory performance improved following exercise, regardless of the level of dehydration. Changes in cognitive performance following exercise are hypothesized to be related to metabolic arousal following strenuous physical activity.


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Dr. PhD Phillip Daniel Tomporowski

Department of Kinesiology
University of Georgia

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Athens, GA 30602


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