The purpose was to determine differences in acute and chronic hydration status in female student-athletes (n = 40) practicing in moderate, dry conditions (17–25 °C, 30–57% humidity) indoors and outdoors. Body weight and urine samples were recorded before and after exercise as well as fluid intake. Sweat rates expressed as median and interquartile range did not differ, but fluid intake was significantly higher during indoor (0.64 [0.50, 0.83] L/h) vs. outdoor conditions (0.51 [0.43, 0.63] L/h), p = 0.001. Fluid intake compensated for indoor sweat rate but not outdoors. When exercising indoors, 49% of the student-athletes reported urine specific gravity (USG) values >1.020, and 24% of the day after morning samples were scored ≥4 on the color chart rating. The percentages increased to 58% and 31%, respectively, when exercising outdoors (p > 0.05). Thus, fluid intake was higher indoors vs. outdoors but sweat rate did not differ among athletes. Yet, chronic hydration status was impaired in more than 50% of the student-athletes with a discrepancy between USG scores and urine color scores identifying underhydration. This suggest that 24-h fluid intake should be taken into account and that hydration protocols may need to be tailored individually based on urine USG values. Practice location (indoors vs. outdoors) may further complicate hydration protocols.
展开▼
机译：目的是确定在室内和室外处于中等干燥条件（17–25°C，湿度30–57％）的女学生运动员（n = 40）在急性和慢性水合作用状态上的差异。记录运动前后的体重和尿液样本以及液体摄入量。以中位数和四分位数间距表示的出汗率没有差异，但是室内（0.64 [0.50，0.83] L / h）的吸水量明显高于室外（0.51 [0.43，0.63] L / h），p = 0.001 。液体摄入量补偿了室内出汗率，但室外没有补偿。在室内进行运动时，有49％的学生运动员报告的尿比重（USG）值> 1.020，并且在早晨样本后第二天的24％的颜色表评分为≥4。在户外运动时，该百分比分别增加到58％和31％（p> 0.05）。因此，室内与室外的液体摄入量较高，但运动员的出汗率没有差异。然而，超过50％的学生运动员的慢性水合状态受损，USG评分与尿液颜色评分之间的差异可识别出水合不足。这表明应考虑24小时的液体摄入量，并且可能需要根据尿液的USG值分别调整水合方案。练习地点（室内还是室外）可能会使水合方案更加复杂。
展开▼
