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The effects of hydration on cognitive performance during a simulated wildfire suppression shift in temperate and hot conditions

journal contribution
posted on 01.05.2019, 00:00 authored by Michael A Cvirn, Jillian Dorrian, Bradley P Smith, Grace E Vincent, Sarah M Jay, Greg D Roach, Charli Sargent, Brianna Larsen, Brad AisbettBrad Aisbett, Sally A Ferguson
The effects on dehydration and cognitive performance from heat and/or physical activity are well established in the laboratory, although have not yet been studied for personnel working in occupations such as wildland firefighting regularly exposed to these types of conditions. This study aimed to investigate the effects of temperature and dehydration on seventy-three volunteer firefighters (35.7 ± 13.7 years, mean ± standard deviation) during a simulation of wildfire suppression under either control or hot (18-20; or 33-35 °C) temperature conditions. Results showed cognitive performance on the psychomotor vigilance task declined when participants were dehydrated in the heat and Stroop task performance was impaired when dehydrated late in the afternoon. Firefighters may be at risk of deteriorations in simple cognitive functions in the heat whilst dehydrated, although may also experience impairments in complex cognitive functions if dehydrated late in the day, irrespective of the environmental temperature.

History

Journal

Applied ergonomics

Volume

77

Pagination

9 - 15

Publisher

Elsevier

Location

Amsterdam, The Netherlands

eISSN

1872-9126

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, Published by Elsevier Ltd.