Hydration is crucial for maintaining cognitive function during exercise, as it directly influences brain performance and overall energy levels. Dehydration can impair attention, memory, and decision-making, leading to decreased physical performance. Sufficient fluid intake helps maintain optimal blood flow and nutrient delivery to the brain, which is essential during demanding physical activities. This is particularly important in endurance exercises where electrolyte balance is also a factor. Staying hydrated can prevent fatigue and enhance mental clarity, allowing individuals to perform better during workouts.