Citation

Webb HE, Garten RS, McMinn DR, Beckman JL, Kamimori GH, Acevedo EO. Biol. Psychol. 2011; 87(1): 152-160.

Affiliation

Mississippi State University, Mississippi State, Mississippi.

Copyright

(Copyright © 2011, Elsevier Publishing)

DOI

10.1016/j.biopsycho.2011.02.024

PMID

21382435

Abstract

The purpose of this study was to examine the effects of concurrent physical and mental challenge on stress hormones and indicators of vascularfunctionin firefighters. Twelve professional firefighters exercised at 60% VO(2max) while participating in a computerized Fire Strategies and Tactics Drill (FSTD-fire strategies condition [FSC]), and again at the same intensity without the mental challenge (EAC). No differencesin the amount of work performed between conditions existed, although the FSC resulted in greater perceptions of overall workload. Epinephrine and norepinephrine demonstrated significant interaction effects with elevated levels during the FSC. Cortisol responses were significantly elevated across time and for the FSC. Positive correlations were found between cortisol and interleukin-6, endothelin-1, and thromboxane-B(2), and a negative correlation between interleukin-6 and thromboxane-B(2). These results suggest that concurrent challenges results in exacerbated responses of stress hormones and suggests mechanisms that could contribute to the prevalence of cardiovascular events among firefighters.

Language: en