Post-exercise cooling techniques in hot,humid conditions |
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Authors: | Martin James Barwood Sarah Davey James R House and Michael J Tipton |
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Institution: | (1) Department of Sport and Exercise Science, University of Portsmouth, Spinnaker Building, Cambridge Road, Portsmouth, PO1 2ER, UK |
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Abstract: | Major sporting events are often held in hot and humid environmental conditions. Cooling techniques have been used to reduce
the risk of heat illness following exercise. This study compared the efficacy of five cooling techniques, hand immersion (HI),
whole body fanning (WBF), an air cooled garment (ACG), a liquid cooled garment (LCG) and a phase change garment (PCG), against
a natural cooling control condition (CON) over two periods between and following exercise bouts in 31°C, 70%RH air. Nine males
age 22 (3) years; height 1.80 (0.04) m; mass 69.80 (7.10) kg] exercised on a treadmill at a maximal sustainable work intensity
until rectal temperature (T
re) reached 38.5°C following which they underwent a resting recovery (0–15 min; COOL 1). They then recommenced exercise until
T
re again reached 38.5°C and then undertook 30 min of cooling with (0–15 min; COOL 2A), and without face fanning (15–30 min;
COOL 2B). Based on mean body temperature changes (COOL 1), WBF was most effective in extracting heat: CON 99 W; WBF: 235 W;
PCG: 141 W; HI: 162 W; ACG: 101 W; LCG: 49 W) as a consequence of evaporating more sweat. Therefore, WBF represents a cheap
and practical means of post-exercise cooling in hot, humid conditions in a sporting setting. |
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Keywords: | |
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