Project Title

Assessing thermoregulatory deficits of trained individuals with a spinal cord injury exercising in the heat

Chief Investigator

Ollie Jay


Recent investigation by Cramer and Jay1 has identified the traditional approach of prescribing exercise intensity based on maximal oxygen consumption (VO2 max) as being inappropriate when comparing thermoregulatory measures between groups that differ based on factors such as injury, disease, sex or age. Exercise intensity set as a percentage of VO2 max fails to account for individual differences in body mass and body surface area (BSA), thus leading to variation in metabolic heat production (Hprod), evaporative heat balance requirements and ultimately, changes in core temperature. Instead, when investigating time-dependent changes in core temperature in groups that differ in body mass, intensity should be prescribed in W/kg. For comparisons of local sweat rates during steady state exercise in groups that differ in body surface area, intensity should be prescribed in W/m2. Finally, investigations comparing whole-body sweat loss should be done so with a fixed absolute heat production in W (Figure 1, Jay & Cramer, Temperature. 2014)2. This methodology is critical for establishing an unbiased understanding thermoregulatory deficits in various populations.


exercise, metabolic, methodology, procedure, equipment

Document Type

Research Methodology

Lead Organisation

University of Sydney

Partner Oganisations

Australian Institute of Sport

Publication Year


Distribution License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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