Hydration plays a vital role in physical performance by regulating body temperature, maintaining joint lubrication, and facilitating nutrient delivery. Proper hydration ensures that the body can effectively perform during exercise and recover afterward. Dehydration can lead to fatigue, decreased strength, and impaired cognitive function. Athletes and active individuals should monitor hydration levels, especially during intense workouts or hot conditions, to prevent performance decline. Drinking water before, during, and after exercise, as well as consuming fluids with electrolytes, can help maintain optimal hydration and support overall performance.