Cooling Capacity of Transpulmonary Cooling and Cold-Water Immersion After Exercise-Induced Hyperthermia.

Autor:	Adams, William M., Butke, Erin E., Lee, Junyong, Zaplatosch, Mitchell E.
Předmět:	THERMOTHERAPY IMMERSION in liquids BODY temperature CONFIDENCE intervals COLD therapy ONE-way analysis of variance PHYSICAL training & conditioning WATER TREATMENT effectiveness RANDOMIZED controlled trials RECTUM RESEARCH funding HEART beat DESCRIPTIVE statistics REPEATED measures design RESPIRATION STATISTICAL sampling CROSSOVER trials COLD (Temperature)
Zdroj:	Journal of Athletic Training (Allen Press); Apr2021, Vol. 56 Issue 4, p383-388, 6p
Abstrakt:	Context: Cold-water immersion (CWI) may not be feasible in some remote settings, prompting the identification of alternative cooling methods as adjunct treatment modalities for exertional heat stroke (EHS). Objective: To determine the differences in cooling capacities between CWI and the inhalation of cooled air. Design: Randomized controlled clinical trial. Setting: Laboratory. Patients or Other Participants: A total of 12 recreationally active participants (7 men, 5 women; age = 26 6 4 years, height = 170.6 6 10.1 cm, mass = 76.0 6 18.0 kg, body fat = 18.5% 6 9.7%, peak oxygen uptake = 42.7 6 8.9 mLkg-1 min-1 ). Intervention(s): After exercise in a hot environment (408C and 40% relative humidity), participants were randomized to 3 cooling conditions: cooling during passive rest (PASS; control), CWI, and the Polar Breeze thermal rehabilitation machine (PB) with which participants inspired cooled air (22.28C 6 1.08C). Main Outcome Measure(s): Rectal temperature (TREC) and heart rate were continuously measured throughout cooling until TREC reached 38.258C. Results: Cooling rates during CWI (0.188Cmin-1 6 0.068Cmin-1 ) were greater than those during PASS (mean difference [95% CI] of 0.168Cmin-1 [0.138Cmin--1, 0.198Cmin-1 ]; P, .001) and PB (0.158Cmin-1 [0.128Cmin-1 , 0.168Cmin-1 ]; P, .001). Elapsed time to reach a TREC of 38.258C was also faster with CWI (9.71 6 3.30 minutes) than PASS (58.1 minutes [77.1, 39.9 minutes]; P, .001) and PB (46.8 minutes [65.5, 28.2 minutes]; P, .001). Differences in cooling rates and time to reach a TREC of 38.258C between PASS and PB were not different (P . .05). Conclusions: Transpulmonary cooling via cooled-air inhalation did not promote an optimal cooling rate (.0.158Cmin-1 ) for the successful treatment of EHS. In remote settings where EHS is a risk, access and use of treatment methods via CWI or cold-water dousing are imperative to ensuring survival. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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