Hydration and Fluid Intake in Basketball Players During Training: Comparison of Different Age Categories

There are many studies on basketball players’ hydration in the literature. However, no studies have compared the hydration status of basketball players in different age categories. Therefore, this study aims to compare the hydration status and fluid intake of male basketball players of different age categories during a training session. A total of 70 athletes, actively competing in U14 (n = 30) and U21 (n = 40) teams, voluntarily participated. Urine samples were collected before and after the session to assess hydration status via urine specific gravity (USG). Fluid intake was also individually monitored during the training. Results showed a significant interaction between time and age group in terms of USG (F(1,68) = 23.72, p < 0.001, η2 = 0.083). While dehydration levels increased in U14 players during the session, U21 players showed improved hydration. The U21 group consumed significantly more fluid (1.16 ± 0.65 L) than the U14 group (0.72 ± 0.50 L; p = 0.003). No significant correlation was found between fluid intake and hydration change in either group. These findings suggest that younger athletes may require more guidance and education regarding proper hydration habits during training.