Hydration plays a critical role in physical performance, as even mild dehydration can impair endurance, strength, and cognitive function. Water is essential for regulating body temperature, transporting nutrients, and lubricating joints. Proper hydration supports optimal muscle contraction and helps maintain blood volume during exercise. Additionally, staying hydrated improves recovery post-workout by aiding in the removal of waste products from metabolism. Athletes and active individuals should prioritize hydration before, during, and after workouts to ensure peak performance and overall health.