Citation

McAllister MJ, Basham SA, Smith JW, Waldman HS, Krings BM, Mettler JA, Butawan MB, Bloomer RJ. J. Occup. Environ. Med. 2018; 60(11): e595-e601.

Affiliation

Department of Health and Human Performance, Texas State University, San Marcos TX, 78666 (Matthew J. McAllister and Joni A. Mettler), Applied Physiology Lab, Department of Kinesiology, Mississippi State University, Mississippi State MS, 39762 (Steven A. Basham, JohnEric W. Smith and Hunter S. Waldman), Department of Health and Human Performance, University of Wisconsin-Platteville, Platteville WI, 53818 (Ben M. Krings), School of Health Studies, The University of Memphis, Memphis TN, 38152 (Matthew B. Butawan and Richard J. Bloomer).

Copyright

(Copyright © 2018, Lippincott Williams and Wilkins)

DOI

10.1097/JOM.0000000000001452

PMID

30252723

Abstract

OBJECTIVE: Firefighters (FFs) involved in fire suppression have the greatest on-duty risk of cardiovascular disease (CVD), which may be caused by oxidative stress (OS).

METHODS: Healthy, active FFs performed a victim "search and clear" exercise involving three conditions: 1) no heat, 2) heat + antioxidant, and 3) heat + placebo. Blood samples were analyzed for OS markers glutathione (GSH), oxidized glutathione (GSSG), superoxide dismutase (SOD), catalase (CAT), and advanced oxidation protein products (AOPP).

RESULTS: Increased GSH was found during both heat conditions compared to no heat. CAT activity was higher immediately post exercise. AOPP was reduced post exercise.

CONCLUSIONS: Antioxidant supplementation did not impact the OS response to exercise. Added heat did not cause OS and exercise resulted in reductions in OS markers. These findings can be attributed to the training status of the FFs involved.

Language: en