Hydration plays a critical role in athletic performance, as even slight dehydration can impair physical function and cognitive abilities. Proper hydration helps regulate body temperature, lubricates joints, and supports nutrient transportation. During exercise, especially in hot conditions, losing fluids through sweat can lead to a decrease in performance, increased fatigue, and higher injury risks. Therefore, athletes should prioritize adequate fluid intake before, during, and after workouts to maintain optimal performance levels. Monitoring hydration status and understanding individual needs is key to sustaining energy and focus during physical activities.