Abstract
Evidence demonstrates that for unbiased comparisons of changes in core temperature (ΔTcore) between groups unmatched for body morphology, exercise should be performed using a fixed heat production (Hprod) per unit mass in physiologically compensable environments [1]. In uncompensable conditions, it has been suggested that a fixed external workload is the primary determinant of ΔTcore [2], however in addition to not accounting for differences in Hprod relative to mass, such an approach excludes the influence of differences the surface area-to-mass ratio on the absolute maximum rate of evaporative heat loss (Emax). We examined the best method for performing unbiased comparisons of ΔTcore between groups unmatched for body morphology during exercise in an uncompensable environment.
Highlights
Evidence demonstrates that for unbiased comparisons of changes in core temperature (ΔTcore) between groups unmatched for body morphology, exercise should be performed using a fixed heat production (Hprod) per unit mass in physiologically compensable environments [1]
Participants completed three trials, during which they cycled for 75 min at 35 °C, 70 % RH, at a target (i) absolute workload of 100 W, (ii) Hprod of 6 W.kg-1, or (iii) Hprod of 3 W.kg-1 above Emax
* Correspondence: Ollie.jay@sydney.edu.au 1School of Human Kinetics, University of Ottawa, Canada Full list of author information is available at the end of the article nal workload of 100 W (P = 0.036; Figure 1A); and in the LG group at an Hprod of 6 W.kg-1 (P < 0.001; Figure 1B). This systematic difference in ΔTre between SM and LG groups was abolished at a fixed Hprod of 3 W.kg-1 above Emax (P = 0.999; Figure 1C)
Summary
Evidence demonstrates that for unbiased comparisons of changes in core temperature (ΔTcore) between groups unmatched for body morphology, exercise should be performed using a fixed heat production (Hprod) per unit mass in physiologically compensable environments [1]. It has been suggested that a fixed external workload is the primary determinant of ΔTcore [2], in addition to not accounting for differences in Hprod relative to mass, such an approach excludes the influence of differences the surface area-to-mass ratio on the absolute maximum rate of evaporative heat loss (Emax). We examined the best method for performing unbiased comparisons of ΔTcore between groups unmatched for body morphology during exercise in an uncompensable environment
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