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.
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/979 |
| Date | 09 June 2008 |
| Creators | Mulligan, Gregory John |
| Contributors | Docherty, David |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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