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Title: Head pre-cooling improves 5-km time-trial performance in male amateur runners in the heat.
Authors: Coelho, Leonardo Gomes Martins
Ferreira Júnior, João Batista
Williams, Thomas B.
Lima, André Maia
Borba, Diego de Alcantara
Silva, Cristiano D.
Coelho, Daniel Barbosa
Barros, Cristiano Lino Monteiro de
Prado, Luciano Sales
Garcia, Emerson Silami
Keywords: Endurance exercise
Issue Date: 2021
Citation: COELHO, L. G. M. et al. Head pre-cooling improves 5-km time-trial performance in male amateur runners in the heat. Scandinavian Journal of Medicine & Science in Sports, v. 31, p. 1753-1763, 2021. Disponível em: <>. Acesso em: 11 out. 2022.
Abstract: This study aimed to evaluate the effect of head pre-cooling on the 5-km time-trial perfor- mance of amateur runners in the heat. In a counterbalanced design, 15 male amateur run- ners (22.6 ± 3.5 y; VO2 max in heat 42.3 ± 4.4 mLO2/kg/min) completed two 5-km time trials performed in the heat (35°C, 50% relative humidity). In one trial (HCOOL), partici- pants underwent 20 min of head cooling in a temperate environment (23°C, 70% relative humidity) prior to exercise. In another trial (CON), exercise was preceded by 20 min of rest under the same temperature conditions. Exercise time was shorter in HCOOL (25 min and 36 s ± 3 min) compared to CON (27 ± 3 min; p = 0.02). Rectal tempera- ture was reduced during the pre-exercise intervention in HCOOL (p < 0.001), but not in CON (p = 0.55). Relative changes in rectal temperature and mean head temperature were lower throughout HCOOL when compared with CON condition (p = 0.005 and p = 0.022, respectively). Mean skin temperature, heart rate, and rating of perceived exer- tion did not differ between HCOOL and CON conditions throughout exercise (p = 0.20, p = 0.52 and 0.31, respectively). Thermal comfort was lower in HCOOL condition in pre-exercise (p = 0.014) with no differences observed throughout exercise (p = 0.61). 5-km running performance in a hot environment was improved after a 20-min head cool- ing intervention, suggesting that this method may be practical as pre-cooling strategy and easily administered to both professional and amateur runners alike.
ISSN: 1600-0838
Appears in Collections:DEEFD - Artigos publicados em periódicos

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