Fire service instructor's undergarment choice to reduce Interleukin-6 and minimise physiological and perceptual strain |
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| Institution: | 1. Exercise Physiology Laboratory, Department of Physical Education, School of Physical Education, Physiotherapy and Occupational Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil;2. Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil;3. Department of Physical Education, Institute of Life Sciences, Universidade Federal de Juiz de Fora, Governador Valadares, MG, Brazil;1. Dipartimento di Scienza Applicata e Technologia, Politecnico di Torino, sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy;2. Institut Charles Gerhardt UMR 5253 (Université de Montpellier II, Université de Montpellier I, Centre National de Recherche Scientifique and Ecole Nationale Supérieure de Chimie de Montpellier), IAM, Rue de l’école normale, 34296 Montpellier cedex 5, France;1. Station d''Ecologie Théorique et Expérimentale, UMR 5321, CNRS 2 route du CNRS, 09200 Moulis, France;2. CESCO UMR 7204, Bases écologiques de la Conservation, Muséum national d''Histoire naturelle, 4 Avenue du Petit Château, 91800 Brunoy, France;3. CEFE UMR 5175, CNRS – Université de Montpellier – Université Paul-Valéry Montpellier – EPHE, Laboratoire Biogéographie et Ecologie des Vertébrés, 1919 route de Mende, 34293 Montpellier, France;1. School of Kinesiology, Recreation & Sport, Western Kentucky University, Bowling Green, KY 42101, United States;2. Neuromechanics Laboratory, Department of Kinesiology, Mississippi State University, MS 39762, United States;1. Department of Biology, Faculty of Science, Hakim Sabzevari University, Sabzevar, Iran;2. Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran;3. Young Researchers and Elite Club, Islamic Azad University, Shirvan Branch, Shirvan, Iran |
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| Abstract: | Fire Service Instructors frequently experience high levels of physiological and perceptual strain during live fire exposures. Instructors are also at risk of cardiovascular illnesses, with cardiac death being the greatest cause of fire fighter death. Current practice for UK instructors is to select undergarment type based on personal preference, between a boiler suit (BOILER) and a wicking base layer (WBL). Research suggests that shorts and t-shirt (SHORTS) may also be a beneficial alternative undergarment choice. The UK South East Fire Service requested an investigation to identify if undergarment selection can lessen the strain experienced by instructors, and reduce the acute inflammatory response to fire exposures. Eight males completed three 45 min sessions in a heat chamber (49.5±1.4 °C and 16.9±4.3% RH) whilst performing intermittent walking. At the end of heat exposure change in heart rate was not effected by garment type (p=0.061, ηp2=0.373). Change in rectal temperature was different between garments (p=0.009, ηp2=0.271), with trends suggesting that BOILER resulted in a greater change (1.03±0.60 °C) than SHORTS (0.76±0.37 °C, p=0.589, d=0.21) and WBL (0.72±0.33 °C, p=0.545, d=0.25). Interleukin-6 post exposure was greater for BOILER (6.96±0.28 pg mL?1) than both SHORTS (6.59±0.30 pg mL?1, p=0.043, d=0.42) and WBL (6.45±0.43 pg mL?1, p=0.031, d=0.51). Overall, undergarment type had little impact on physiological or perceptual strain. However, wearing WBL or SHORTS may reduce the inflammatory response, and consequently decrease the risk of cardiovascular events. |
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| Keywords: | Fire service Heat exposure Clothing Occupational health |
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