Exercise and Heat Stress in Well-Healed Burn Survivors: Effects of Cooling Modalities on Thermal and Perceptual Responses.

Autor:	Atkins WC; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX., Foster J, McKenna ZJ; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX., Jarrard CP; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX., Watso JC, Belval LN; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX., Jay O; Heat and Health Research Incubator, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, AUSTRALIA., Crandall CG; Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX, and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX.
Jazyk:	angličtina
Zdroj:	Medicine and science in sports and exercise [Med Sci Sports Exerc] 2024 Sep 16. Date of Electronic Publication: 2024 Sep 16.
DOI:	10.1249/MSS.0000000000003557
Abstrakt:	Purpose: Burn injuries that require grafting impair thermoregulation, which may dissuade individuals with such injuries from being physically active. We tested the hypothesis that cooling modalities attenuate core temperature elevations and perceptions of heat stress during physical activity in the heat among adults with well-healed burn injuries. Methods: Adults with no burn injuries (non-burned), 20-40% body surface area burn injuries (moderate burn), and > 40% body surface area burn injuries (large burn) performed 1 hour of moderate intensity exercise (2.5 ± 0.2 mph and 2% grade) on four different occasions in two environmental conditions (30 °C & 39 °C, 40% relative humidity). Within each environmental condition, we applied one of the following cooling modalities, random assigned, for each visit: no cooling (control), fan at 4 m/s (fan), water spray every 5 min (water spray; scaled to burn area size), or a combination of water spray + fan. Results: In 30 °C, perceptual strain index (PeSI) was reduced in the non-burned and moderate burn groups with water spray + fan, whereas PeSI was reduced with all cooling modalities in the large burn group. The cooling modalities did not affect core temperature responses. In the 39 °C environment, water spray and water spray + fan attenuated the elevation in core temperature (p ≤ 0.007) only in the large burn group. In the moderate burn group, PeSI was decreased with water spray + fan (p = 0.017). In the large burn group, both water spray alone and water spray + fan (p ≤ 0.041) lowered PeSI. Conclusions: For both environments across burn groups, the applied cooling modalities were generally more effective at reducing indices of perceptual strain relative to indices of thermal strain (e.g., core temperature). Competing Interests: Conflict of Interest and Funding Source: This work was supported by awards from the National Institutes of Health (R01GM068865 to CGC and K01HL160772 to JCW), Department of Defense (W81XWH-15-1-0647 to CGC), and the American Heart Association (23CDA1037938 to JCW). The authors have no conflicts of interest to disclose. (Copyright © 2024 by the American College of Sports Medicine.)
Databáze:	MEDLINE
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