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The utility of heart rate and minute ventilation as predictors of whole-body metabolic rate during occupational simulations involving load carriage
- Source :
- Faculty of Science, Medicine and Health - Papers: part A
- Publication Year :
- 2015
-
Abstract
- The utility of cardiac and ventilatory predictors of metabolic rate derived under temperate and heated laboratory conditions was evaluated during three fire-fighting simulations (70-mm hose drag, Hazmat recovery, bushfire hose drag; N = 16 per simulation). The limits of agreement for cardiac (temperate: − 0.54 to 1.77; heated: − 1.39 to 0.80 l min− 1) and ventilatory surrogates (temperate: − 0.19 to 1.27; heated: − 0.26 to 1.16 l min− 1) revealed an over-estimation of oxygen consumption that exceeded the acceptable limits required by occupational physiologists (N = 25; ± 0.24 l min− 1). Although ventilatory predictions offered superior precision during low-intensity work (P < 0.05), a cardiac prediction was superior during more demanding work (P < 0.05). Deriving those equations under heated conditions failed to improve precision, with the exception of the cardiac surrogate during low-intensity work (P < 0.05). These observations imply that individualised prediction curves are necessary for valid estimations of metabolic demand in the field.
Details
- Database :
- OAIster
- Journal :
- Faculty of Science, Medicine and Health - Papers: part A
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1086606463
- Document Type :
- Electronic Resource