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Post-exercise hot water immersion induces heat acclimation and improves endurance exercise performance in the heat

Zurawlew, MJ, Walsh, NP, Fortes, MB and Potter, C (2015) Post-exercise hot water immersion induces heat acclimation and improves endurance exercise performance in the heat. Scandinavian Journal of Medicine and Science in Sports, 26 (7). pp. 745-754. ISSN 1600-0838

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Abstract

We examined whether daily hot water immersion (HWI) after exercise in temperate conditions induces heat acclimation and improves endurance performance in temperate and hot conditions. Seventeen non-heat-acclimatized males performed a 6-day intervention involving a daily treadmill run for 40 min at 65% VO2max in temperate conditions (18 degrees C) followed immediately by either HWI (N = 10; 40 degrees C) or thermoneutral (CON, N = 7; 34 degrees C) immersion for 40 min. Before and after the 6-day intervention, participants performed a treadmill run for 40 min at 65% VO2max followed by a 5-km treadmill time trial (TT) in temperate (18 degrees C, 40% humidity) and hot (33 degrees C, 40% humidity) conditions. HWI induced heat acclimation demonstrated by lower resting rectal temperature (Tre , mean, -0.27 degrees C, P < 0.01), and final Tre during submaximal exercise in 18 degrees C (-0.28 degrees C, P < 0.01) and 33 degrees C (-0.36 degrees C, P < 0.01). Skin temperature, Tre at sweating onset and RPE were lower during submaximal exercise in 18 degrees C and 33 degrees C after 6 days in HWI (P < 0.05). Physiological strain and thermal sensation were also lower during submaximal exercise in 33 degrees C after 6 days in HWI (P < 0.05). HWI improved TT performance in 33 degrees C (4.9%, P < 0.01) but not in 18 degrees C. Thermoregulatory measures and performance did not change in CON. Hot water immersion after exercise on 6 days presents a simple, practical, and effective heat acclimation strategy to improve endurance performance in the heat.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Zurawlew, M.J., Walsh, N.P., Fortes, M.B. and Potter, C. (2016), Post‐exercise hot water immersion induces heat acclimation and improves endurance exercise performance in the heat. Scand J Med Sci Sports, 26: 745-754. , which has been published in final form at http://dx.doi.org/10.1111/sms.12638. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Uncontrolled Keywords: 1106 Human Movement and Sports Sciences
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Sports & Exercise Sciences
Publisher: Wiley
Related URLs:
Date Deposited: 12 Mar 2020 12:45
Last Modified: 12 Mar 2020 12:45
DOI or Identification number: 10.1111/sms.12638
URI: http://researchonline.ljmu.ac.uk/id/eprint/12471

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