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The effect of prescribed fluid consumption on physiology and work behavior of wildfire fighters

journal contribution
posted on 01.05.2013, 00:00 authored by Jennifer Kate Raines, Rod SnowRod Snow, Aaron Petersen, J Harvey, David Nichols, Brad AisbettBrad Aisbett
The purpose of this study was to examine 1) wildfire fighters' ability to consume the prescribed fluid volume (1200 mL h-1), 2) the effect of fluid intake on plasma sodium and hydration, and 3) the effect of fluid intake on firefighters' heart rate, core temperature and activity during emergency suppression shifts. Methods: Thirty-four firefighters were divided into ad libitum (AD, n = 17) and prescribed (PR, n = 17) drinking groups. Results: PR drinkers did not meet the prescribed fluid target, yet consumed over double the volume of AD drinkers. No differences between groups in plasma sodium or hydration were noted. PR drinking resulted in lower core temperature between 2 and 6 h. This did not coincide with reduced cardiovascular strain, greater work activity or larger distances covered when compared to AD drinkers. Conclusion: Extra fluid consumption (above AD) did not improve firefighter activity or physiological function (though PR firefighters core temperature was lower earlier in their shift). Firefighter can self-regulate their fluid consumption behavior and work rate to leave the fireground euhydrated.

History

Journal

Applied ergonomics

Volume

44

Issue

3

Pagination

404 - 413

Publisher

Pergamon

Location

Oxford, England

ISSN

0003-6870

eISSN

1872-9126

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2013, Elsevier