Hydration plays a vital role in exercise performance as it regulates body temperature and maintains hydration levels. Dehydration can lead to fatigue, reduced endurance, and impaired cognitive function, negatively affecting physical performance. Proper hydration before, during, and after exercise is essential for sustaining energy levels and promoting recovery. Adequate fluid intake ensures that the body can effectively transport nutrients, remove waste products, and support muscle function, resulting in optimal performance and reduced risk of injury during physical activity.