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Journal of Occupational & Environmental Medicine:
doi: 10.1097/JOM.0000000000000086
Original Articles

Revisiting Ventilatory and Cardiovascular Predictions of Whole-Body Metabolic Rate

Notley, Sean R. MSc; Fullagar, Hugh H. K. MSc; Lee, Daniel S. MSc; Matsuda-Nakamura, Mayumi PhD; Peoples, Gregory E. PhD; Taylor, Nigel A. S. PhD

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Objective: The influence of variations in exercise mode, thermal state, and load carriage on cardiac and ventilatory predictors of metabolic rate were investigated.

Methods: Fifteen males were studied at rest and during whole-, upper-, and lower-body exercise (unloaded and loaded) under thermoneutral and hot conditions.

Results: Ventilatory predictions were superior in thermoneutral (residual mean square error range: 0.04 to 0.17 L·min−1 vs 0.21 to 0.36 L·min−1) and hot conditions (0.03 to 0.07 L·min−1 vs 0.21 to 0.24 L·min−1). Predictions derived from whole- or lower-body exercise, and unloaded or loaded exercise could be interchanged without significant error. Nevertheless, a mode-specific prediction was required for upper-body work, and mild hyperthermia significantly reduced the precision of cardiac predictions.

Conclusion: Ventilatory predictions were more precise, but errors from heart-rate predictions could be minimized by using thermal-state and exercise mode-specific predictions.

Copyright © 2014 by the American College of Occupational and Environmental Medicine


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