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Electric Fan Use With Dehydration in Extreme Heat and Humidity

JAMA Network Open 10.1001/jamanetworkopen.2025.26701

August 13, 2025 at 11:00 AM EDT

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This randomized crossover trial evaluates whether hydration levels modify the effects of fan use on cardiovascular strain, body temperature, and thermal comfort after 3 hours of heat exposure.

Corresponding Author: Ollie Jay, PhD, Heat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, NSW 2050, Australia (ollie.jay@sydney.edu.au).

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