The utility of heart rate and minute ventilation as predictors of whole-body metabolic rate during occupational simulations involving load carriage

Ergonomics
Sean R NotleyNigel A S Taylor

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.

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Citations

Jan 8, 2016·European Journal of Applied Physiology·Gregory E PeoplesNigel A S Taylor
Jun 10, 2016·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Nigel A S TaylorStewart R Petersen
Jun 10, 2016·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Stewart R PetersenNigel A S Taylor
Feb 28, 2018·European Journal of Applied Physiology·Nigel A S TaylorMichael I Lindinger
Sep 7, 2019·Journal of Occupational and Environmental Medicine·Catriona A BurdonKane J Middleton

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