Abstract：
Ice slurry ingestion during prolonged exercises may improve performance in hot environments; however, the ideal amount and timing of ingestion are still uncertain. We determined whether ad libitum ice slurry ingestion influences physiological and perceptual variables and half-marathon performance while comparing the effects of the amount and moment of ingestion between ice slurry and water at 37 °C. Ten trained participants (28 ± 2 years; mean and SD) were required to run two half marathons while consuming either ice slurry (-1 °C; Ad-1) or water (37 °C; 37 CE) ad libitum. They then performed two other half marathons where, during one, they were required to ingest an amount of water equivalent to the amount consumed during the Ad-1 trial (Pro37), and in the other, to ingest ice slurry in the amount consumed during the 37 CE trial (Pro-1). During the half marathons, dry-bulb temperature and relative humidity were controlled at 33.1 ± 0.3 °C and 60 ± 3%, respectively. Ad-1 ingestion (349.6 ± 58.5 g) was 45% less than 37 CE ingestion (635.5 ± 135.8 g). Physical performance, heart rate, perceived exertion, body temperatures, and thermal perception were not influenced by the temperature or amount of beverage ingestion. However, a secondary analysis suggested that lower beverage ingestion was associated with improved performance (Ad-1 + Pro37 vs. 37 CE + Pro-1: -4.0 min, Cohen\'s d = 0.39), with a significant relationship between lower beverage ingestion and faster running time (b = 0.02, t = 4.01, p < 0.001). In conclusion, ice slurry ingestion does not affect performance or physiological or perceptual variables during a half marathon in a hot environment. Preliminary evidence suggests that lower beverage ingestion (ice slurry or warm water) is associated with improved performance compared to higher ingestion.
摘要：
在长时间锻炼过程中摄入冰浆可能会提高在炎热环境中的表现；然而，理想的摄入量和时间仍然不确定。我们确定随意摄入冰浆是否会影响生理和知觉变量以及半程马拉松表现，同时比较37°C下冰浆和水之间的摄入量和时间的影响。需要十名训练有素的参与者（28±2年；平均值和SD）进行两次半马拉松比赛，同时随意消耗冰浆（-1°C；Ad-1）或水（37°C；37CE）。然后他们进行了另外两次半马拉松比赛，在一个,他们被要求摄入相当于Ad-1试验期间消耗的水量(Pro37)，在另一个，以37CE试验(Pro-1)期间消耗的量摄取冰浆。在半程马拉松比赛中，干球温度和相对湿度控制在33.1±0.3°C和60±3%，分别。Ad-1摄入（349.6±58.5g）比37CE摄入（635.5±135.8g）少45％。物理性能,心率,感知到的努力，体温,和热感知不受温度或饮料摄入量的影响。然而,次要分析表明，较低的饮料摄入量与改善的性能相关(Ad-1+Pro37与37CE+Pro-1：-4.0分钟，科恩的d=0.39)，与较低的饮料摄入量和较快的运行时间之间存在显着关系（b=0.02，t=4.01，p<0.001）。总之,在高温环境下的半程马拉松中，冰浆摄入不会影响性能或生理或感知变量。初步证据表明，与较高的摄入相比，较低的饮料摄入（冰浆或温水）与改善的性能有关。
