This study aimed to examine differences between sexes in thermoregulatory responses and exercise time after ice slurry ingestion in a hot environment. Twenty-four healthy adults (male n = 12, body weight (BW) = 65.8 ± 10.3; female n = 12, BW = 58.2 ± 10.0) ingested 7.5 g/kg of either ice slurry at -1 °C (ICE) or control water at 20 °C (CON) before cycling at 55%VO2 max in a hot environment (controlled at 38 °C, 40% relative humidity). Rectal (Tre) and skin (Tsk) temperature, heart rate, sweat rate, respiratory gases, ratings of thermal sensation (TS), thermal comfort (TC), and rating of perceived exertion (RPE) were measured. Ice slurry did not improve exercise time in both sexes despite Tre was significantly lower in ICE than CON in both sexes. Tre, Tsk, HR, sweat rate and TS did not differ between sexes. TC and RPE in ICE were significantly higher during exercise in males than in females. In conclusion, there were no sex differences in the effects of pre-cooling with ice slurry ingestion; however, pre-cooling with ice slurry may be more effective in mitigating ratings of TC and RPE in females than males.

中文翻译：

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摄入冰浆预冷后，在炎热环境下进行耐力运动时，两性在体温调节反应和运动时间方面的差异

本研究旨在检查在炎热环境中摄入冰浆后，两性在体温调节反应和运动时间方面的差异。24 名健康成人（男性 n = 12，体重 (BW) = 65.8 ± 10.3；女性 n = 12，BW = 58.2 ± 10.0）在 -1 °C (ICE) 或在热环境（控制在 38 °C，40% 的相对湿度）中以 55% VO2 max 循环之前，将水控制在 20 °C (CON)。测量直肠 (Tre) 和皮肤 (Tsk) 温度、心率、出汗率、呼吸气体、热感觉 (TS) 等级、热舒适度 (TC) 和感知用力等级 (RPE)。尽管 ICE 的 Tre 显着低于两性的 CON，但冰浆并未改善两性的运动时间。Tre、Tsk、HR、出汗率和 TS 在性别之间没有差异。男性在运动期间 ICE 中的 TC 和 RPE 显着高于女性。总而言之，摄入冰浆的预冷效果没有性别差异；然而，用冰浆预冷可能比男性更有效地降低女性的 TC 和 RPE 等级。