Hydration plays a crucial role in regulating body temperature during exercise. When exercising, the body produces heat, and to maintain an optimal temperature, it needs to sweat. Proper hydration ensures that sweat can evaporate efficiently, aiding in cooling the body down. Dehydration can impair thermoregulation, leading to risks like heat exhaustion or heat stroke. Furthermore, maintaining hydration levels helps in maintaining physical performance, enhancing endurance and reducing the likelihood of cramps or fatigue. Hence, drinking water before, during, and after exercise is essential for sustaining hydration and optimal body temperature.