Dehydration significantly affects athletic performance by impairing physical and cognitive functions. Even mild dehydration can lead to fatigue, decreased coordination, and reduced endurance, ultimately diminishing overall performance. It impacts the ability to regulate body temperature, increasing the risk of heat-related illnesses. Furthermore, dehydration can negatively affect concentration and decision-making during activities. To optimize performance, athletes should prioritize staying hydrated before, during, and after workouts to ensure they can perform at their best and recover effectively.