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Int J Sports Med 2016; 37(13): 1025-1031
DOI: 10.1055/s-0042-107597
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Precooling does not Enhance the Effect on Performance of Midcooling with Ice-Slush/Menthol

F. Riera
1   Laboratoire ACTES – EA 3596, Université des Antilles et de la Guyane, Campus de Fouillole, Point à Pitre, France
2   Laboratoire LEPSA – EA 4604, Université de Perpignan, 7 avenue Pierre de Coubertin, Font Romeu, France
,
T. T. Trong
1   Laboratoire ACTES – EA 3596, Université des Antilles et de la Guyane, Campus de Fouillole, Point à Pitre, France
,
K. Rinaldi
1   Laboratoire ACTES – EA 3596, Université des Antilles et de la Guyane, Campus de Fouillole, Point à Pitre, France
,
O. Hue
1   Laboratoire ACTES – EA 3596, Université des Antilles et de la Guyane, Campus de Fouillole, Point à Pitre, France
› Author Affiliations
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Publication History



accepted after revision 24 April 2016

Publication Date:
05 October 2016 (online)

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Abstract

This study investigated whether the combination of internal precooling (PC) and internal midcooling (MC cooling during exercise) would enhance performance more than MC alone. 9 trained males completed two 30-km cycling trials in a hot and humid environment (WBGT: 29±0.7°C, 80±0.02% relative humidity). For 30 min before exercise, the subjects sat quietly and drank water at 23°C (MC) or 3°C (PC+MC). During the MC and PC+MC time trials, they drank an ice-slush/menthol beverage (i. e., 0.025% menthol). Trial time, gastrointestinal temperature (T co ), heart rate (HR), rating of perceived exertion (RPE), thermal sensation (TS), and thermal comfort (TC) were assessed. Trial time was not significantly different (P>0.05) between MC and PC+MC (3 737±552 s and 3 815±455 s). Before exercise, T co was lower with precooling (37.0±0.3°C; P<0.02). During exercise, no between-trial differences were noted for T co , HR, RPE, TC or TS, but RPE was significantly lower with PC+MC in the latter stages (P<0.05). (1) Cold beverage intake before exercise did not improve the subsequent exercise performance with ice-slush/menthol beverage intake, and (2) despite no improvement in performance, RPE declined in the latter stages of exercise in the condition of PC+MC, suggesting that this combination might be beneficial for longer exercise.

Key words

hot/wet climate - internal cooling - menthol beverage - aerobic performance
 

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