Hydration and heat tolerance are closely related during workouts, as proper fluid intake is crucial for thermoregulation. When exercising, increased body temperature necessitates additional fluid to maintain optimal function and prevent overheating. Dehydration can lead to reduced heat tolerance, elevated heart rate, and impaired physical performance. Staying hydrating before and during exercise supports effective sweating and body temperature regulation, allowing athletes to perform optimally in heat-exposed environments. Therefore, maintaining hydration is essential for both performance enhancement and safety during workouts, especially in warmer conditions.