Date of Graduation

5-2016

Document Type

Thesis

Degree Name

Master of Athletic Training (MAT)

Degree Level

Graduate

Department

Health, Human Performance and Recreation

Advisor/Mentor

McDermott, Brendon P.

Committee Member

Bonacci, Jeffrey A.

Second Committee Member

Ganio, Matthew S.

Third Committee Member

Ylanan, Ramon C.

Keywords

Health and environmental sciences; Exertional heat stroke; Heat illness; Heat strain; Tarp-assisted cooling

Abstract

Context: Recommended treatment of exertional heat stroke (EHS) includes whole body cold-water immersion (CWI); however, remote locations, spatial or monetary restrictions challenge CWI feasibility. Thus, the development of a modified, portable CWI method would allow for optimal treatment of EHS when restrictions apply. Objective: Determine cooling efficacy of modified CWI (tarp assisted cooling with oscillation; TACO) following exertional hyperthermia. Design: Randomized, crossover controlled trial. Setting: Environmental chamber (33.4 ± 0.8°C, 55.7 ± 1.9% relative humidity). Patients or Other Participants: Sixteen (9 males, 7 females) volunteers (26 ± 4.7y, 1.76 ± 0.09m, 72.5 ± 9.0kg, 20.7 ± 7.1%body fat) with no history of compromised thermoregulation participated. Interventions: Participants completed volitional exercise (cycling or treadmill) until a rectal temperature (Tre) ≥39.0°C. Following exercise, participants transitioned to a semi-recumbent position on a tarp until Tre reached 38.1°C or until 15 minutes elapsed during both control (no immersion; CON) and TACO (immersion in 151L of 2.1 ± 0.8°C water). Main Outcome Measures: Tre, heart rate (HR), and blood pressure (reported as mean arterial pressure, MAP), were assessed pre- and post-cooling. Statistical analyses included repeated measures ANOVA with appropriate post-hoc t-tests and Bonferroni correction. Results: Tre prior to cooling was not different between conditions (CON: 39.27 ± 0.26°C, CWI: 39.30 ± 0.39°C; P=0.62; ES=-0.09) whilst post-cooling Tre was decreased in TACO (38.10 ± 0.16°C) compared to CON (38.74 ± 0.38°C, t15=-8.84;P

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