Air conditioning1 and electric fans2 are used to mitigate physiological strain during extreme heat exposure but may not always be available.3 Drinking water is commonly recommended4; however, when applied externally, water also can reduce body heat via evaporation from the skin or conduction when body parts with high surface-area-to-mass ratio are submerged. We assessed whether a self-dousing or a foot immersion intervention mitigated increases in cardiovascular (heart rate) and thermal (core temperature) strain and dehydration during conditions simulating hot, humid and very hot, dry heat waves.
Morris NB, Gruss F, Lempert S, et al. A Preliminary Study of the Effect of Dousing and Foot Immersion on Cardiovascular and Thermal Responses to Extreme Heat. JAMA. 2019;322(14):1411–1413. doi:10.1001/jama.2019.13051
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