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Acute psychophysiological relationships between mood, inflammatory and cortisol changes in response to simulated physical firefighting work and sleep restriction

Wolkow, Alexander, Aisbett, Brad, Reynolds, John, Ferguson, Sally A. and Main, Luana C. 2016, Acute psychophysiological relationships between mood, inflammatory and cortisol changes in response to simulated physical firefighting work and sleep restriction, Applied psychophysiology and biofeedback, vol. 41, no. 2, pp. 165-180, doi: 10.1007/s10484-015-9329-2.

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Title Acute psychophysiological relationships between mood, inflammatory and cortisol changes in response to simulated physical firefighting work and sleep restriction
Author(s) Wolkow, Alexander
Aisbett, BradORCID iD for Aisbett, Brad orcid.org/0000-0001-8077-0272
Reynolds, John
Ferguson, Sally A.
Main, Luana C.ORCID iD for Main, Luana C. orcid.org/0000-0002-9576-9466
Journal name Applied psychophysiology and biofeedback
Volume number 41
Issue number 2
Start page 165
End page 180
Total pages 16
Publisher Springer
Place of publication Berlin, Germany
Publication date 2016-06
ISSN 1573-3270
Keyword(s) Cortisol
Cytokines
Fatigue
Mood
Physical work
Sleep restriction
Summary This study examined how changes in wildland firefighters' mood relate to cytokine and cortisol levels in response to simulated physical firefighting work and sleep restriction. Firefighters completed 3 days of simulated wildfire suppression work separated by an 8-h (control condition; n = 18) or 4-h sleep opportunity (sleep restriction condition; n = 17) each night. Firefighters' mood was assessed daily using the Mood Scale II and Samn-Perelli fatigue scale. Participants also provided samples for the determination of salivary cortisol and pro- (IL-6, IL-8, IL-1β, TNF-α) and anti-inflammatory (IL-4, IL-10) cytokine levels. An increase in the positive mood dimension Happiness was related to a rise in IL-8 and TNF-α in the sleep restriction condition. A rise in the positive mood dimension Activation among sleep restricted firefighters was also related to higher IL-6 levels. An increase in the negative mood dimension Fatigue in the sleep restriction condition was associated with increased IL-6, TNF-α, IL-10 and cortisol levels. In addition, an increase in Fear among sleep restricted firefighters was associated with a rise in TNF-α. Elevated positive mood and immune activation may reflect an appropriate response by the firefighters to these stressors. To further understand this relationship, subsequent firefighting-based research is needed that investigates whether immune changes are a function of affective arousal linked to the expression of positive moods. Positive associations between negative mood and inflammatory and cortisol levels to physical work and restricted sleep provide useful information to fire agencies about subjective fire-ground indicators of physiological changes.
Language eng
DOI 10.1007/s10484-015-9329-2
Field of Research 170107 Industrial and Organisational Psychology
Socio Economic Objective 920505 Occupational Health
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080420

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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