Assessing thermoregulatory deficits of trained individuals with a spinal cord injury exercising in the heat
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
University of Sydney
Australian Institute of Sport
This work is licensed under a Creative Commons Attribution 4.0 License.
Forsyth, P., & Jay, O. (2017). Prescribing exercise intensity to elicit a fixed heat production. Retrieved from http://epublications.bond.edu.au/crn_assess/1
Appendix C - Analysis of Metabolic Data_ Data Dictionary.csv (1 kB)
Appendix C - Analysis of Metabolic Data_ Metabolic Data.csv (3 kB)
Appendix D - Heat Production Calculator.xlsx (11 kB)
Appendix D - Heat Production Calculator_Data file.csv (1 kB)