Hydration levels significantly influence cognitive performance in athletes. Adequate hydration is crucial for maintaining focus, reaction time, and overall mental function. Dehydration can lead to decreased cognitive abilities, impairing decision-making and coordination. Studies suggest that even slight dehydration can negatively impact athletic performance, making it essential for athletes to monitor their fluid intake before, during, and after activities. Ensuring proper hydration supports both physical and mental endurance, optimizing an athlete's performance.