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The impact of heat exposure and sleep restriction on firefighters’work performance and physiology during simulated wildfire suppression

journal contribution
posted on 09.03.2018, 00:00 authored by Grace VincentGrace Vincent, B Aisbett, B Larsen, ND Ridgers, R Snow, Sally FergusonSally Ferguson
This study was designed to examine the effects of ambient heat on firefighters’ physical task performance, and physiological and perceptual responses when sleep restricted during simulated wildfire conditions. Thirty firefighters were randomly allocated to the sleep restricted (n = 17, SR, 19 °C, 4-h sleep opportunity) or hot and sleep restricted (n = 13, HOT + SR, 33 °C, 4-h sleep opportunity) condition. Firefighters performed two days of simulated, intermittent, self-paced work circuits comprising six firefighting tasks. Heart rate, and core temperature were measured continuously. After each task, firefighters reported their rating of perceived exertion and thermal sensation. Effort sensation was also reported after each work circuit. Fluids were consumed ad libitum. Urine volume and urine specific gravity were analysed. Sleep was monitored using polysomnography. There were no differences between the SR and HOT + SR groups in firefighters’ physiological responses, hydration status, ratings of perceived exertion, motivation, and four of the six firefighting tasks (charged hose advance, rake, hose rolling, static hose hold). Black out hose and lateral repositioning were adversely affected in the HOT + SR group. Working in hot conditions did not appear to consistently impair firefighters work performance, physiology, and perceptual responses. Future research should determine whether such findings remain true when individual tasks are performed over longer durations.

History

Editor

Tchounwou PB

Volume

14

Issue

2

Start Page

1

End Page

15

Number of Pages

15

eISSN

1660-4601

ISSN

1661-7827

Publisher

MDPI, Switzerland

Additional Rights

CC BY 4.0

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

06/02/2017

External Author Affiliations

Deakin University; Bushfire Co-Operative Research Centre; Griffith University

Author Research Institute

Appleton Institute

Era Eligible

Yes

Journal

International Journal of Environmental Research and Public Health

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