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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wolkow, Alexander Aisbett, Brad Reylds, John Ferguson, Sally A. Main, Luana C. |
| Copyright Year | 2015 |
| Abstract | Physical work and sleep restriction are two stressors faced by firefighters, yet the combined impact these demands have on firefighters’ acute stress responses is poorly understood. The purpose of the present study was to assess the effect firefighting work and sleep restriction have on firefighters’ acute cortisol and heart rate (HR) responses during a simulated 3-day and 2-night fire-ground deployment.Firefighters completed multiple days of simulated physical work separated by either an 8-h (control condition; n = 18) or 4-h sleep opportunity (sleep restriction condition; n = 17). Salivary cortisol was sampled every 2 h, and HR was measured continuously each day.On day 2 and day 3 of the deployment, the sleep restriction condition exhibited a significantly higher daily area under the curve cortisol level and an elevated cortisol profile in the afternoon and evening when compared with the control condition. Firefighters’ HR decreased across the simulation, but there were no significant differences found between conditions.Findings highlight the protective role an 8-h sleep opportunity between shifts of firefighting work has on preserving normal cortisol levels when compared to a 4-h sleep opportunity which resulted in elevated afternoon and evening cortisol. Given the adverse health outcomes associated with chronically high cortisol, especially later in the day, future research should examine how prolonged exposure to firefighting work (including restricted sleep) affects firefighters’ cortisol levels long term. Furthermore, monitoring cortisol levels post-deployment will determine the minimum recovery time firefighters need to safely return to the fire-ground. |
| Starting Page | 461 |
| Ending Page | 475 |
| Page Count | 15 |
| File Format | |
| ISSN | 03400131 |
| Journal | International Archives of Occupational and Environmental Health |
| Volume Number | 89 |
| Issue Number | 3 |
| e-ISSN | 14321246 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2015-08-14 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Firefighters Stress Sleep restriction Physical work Cortisol Heart rate Environmental Health Rehabilitation Occupational Medicine/Industrial Medicine |
| Content Type | Text |
| Resource Type | Article |
| Subject | Public Health, Environmental and Occupational Health |
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