Hydration needs can significantly change with the type and intensity of exercise. During high-intensity workouts or prolonged exercise, the body loses more water through sweat, necessitating increased fluid intake. Aerobic activities like running or cycling often result in higher fluid loss than resistance training due to increased perspiration. Environmental factors, such as temperature and humidity, also impact hydration requirements. Athletes should hydrate both before, during, and after workouts, tailoring their intake based on duration and intensity to maintain performance and prevent dehydration.