Dose-Response Effects of Water Supplementation on Cognitive Performance and Mood in Children and Adults

Article


Edmonds, C., Crosbie, Laura, Fatima, Fareeha, Hussain, Maryam, Jacob, Nicole and Gardner, Mark 2016. Dose-Response Effects of Water Supplementation on Cognitive Performance and Mood in Children and Adults. Appetite. 108, pp. 464-470.
AuthorsEdmonds, C., Crosbie, Laura, Fatima, Fareeha, Hussain, Maryam, Jacob, Nicole and Gardner, Mark
Abstract

Water supplementation has been found to facilitate visual attention and short-term memory, but the dose required to improve performance is not yet known. We assessed the dose response effect of water on thirst, mood and cognitive performance in both adults and children. Participants were offered either no water, 25 ml or 300 ml water to drink. Study 1 assessed 96 adults and in Study 2, data are presented from 60 children aged 7-9 years. In both studies, performance was assessed at baseline and 20 minutes after drinking (or no drink); on thirst and mood scales, letter cancellation and a digit span test. For both children and adults, a large drink (300 ml) was necessary to reduce thirst, while a small drink (25 ml) was sufficient to improve visual attention (letter cancellation). In adults, a large drink improved digit span, but there was no such effect in children. In children, but not adults, a small drink resulted in increased thirst ratings. Both children and adults show dose-response effects of drinking on visual attention. Visual attention is enhanced by small amounts of fluid and appears not to be contingent on thirst reduction. Memory performance may be related to thirst, but differently for children and adults. These contrasting dose-response characteristics could imply cognitive enhancement by different mechanisms for these two domains.

KeywordsWater; cognition; drinking; performance; mood
JournalAppetite
Journal citation108, pp. 464-470
ISSN0195-6663
1095-8304
Year2016
PublisherElsevier
Accepted author manuscript
License
CC BY-NC-ND
Digital Object Identifier (DOI)doi:10.1016/j.appet.2016.11.011
Web address (URL)https://doi.org/10.1016/j.appet.2016.11.011
Publication dates
Online05 Nov 2016
Publication process dates
Deposited04 Nov 2016
Accepted03 Nov 2016
Accepted03 Nov 2016
Copyright information© 2016 Elsevier
LicenseCC BY-NC-ND 3.0
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