The importance of hydration during exercise cannot be overstated, as it is critical for maintaining performance and preventing dehydration. Water regulates body temperature, lubricates joints, and aids in nutrient transport and waste removal. During intense physical activity, fluid loss occurs through sweat, which can lead to decreased performance, increased fatigue, and even heat-related illnesses if not replenished. Proper hydration before, during, and after exercise is essential for optimal physical performance and recovery.