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Metabolic and thermal responses of firefighters during repeated work bouts

This study examined the metabolic and thermal responses of 14 firefighters during four repeated work bouts of treadmill exercise in a thermoneutral laboratory, working at an intensity similar to typical firefighting tasks (30-34 ml·kg-1·min-1), while wearing firefighting protective equipment and breathing from a self-contained breathing apparatus. Each work bout consisted of treadmill walking at 93.8 m·min-1 and 8% grade for 8 min followed by 4 min of passive rest. Oxygen consumption remained unchanged between all four work bouts (p>0.05). Ventilation increased significantly (p<0.05) during the first three work bouts from 57.1 (±3.1) to 68.7 (±2.7) L·min-1. Percent heart rate reserve increased significantly (p<0.05) during each work bout, from 76.0 (±1.8) % HRR during the first to 97.2 (±1.1) % HRR during the fourth work bout. Core temperature increased significantly (p<0.05) during each work bout from 36.87 (±0.07) to 38.87 (±0.10) °C from the first to the fourth work bout, as did some of the psychophysiological measures.

  1. http://hdl.handle.net/1828/979
Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:BVIV.1828/979
Date09 June 2008
CreatorsMulligan, Gregory John
ContributorsDocherty, David
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
LanguageEnglish, English
Detected LanguageEnglish
TypeThesis
RightsAvailable to the World Wide Web

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