The function of electrolytes during exercise is to help maintain fluid balance, nerve function, and muscle contractions. Key electrolytes like sodium, potassium, and magnesium play crucial roles in hydration and muscle performance. During intense workouts or prolonged activity, the body loses electrolytes through sweat. Replenishing these electrolytes is vital for preventing dehydration and muscle cramping, which can impair performance and recovery. Consuming electrolyte-rich fluids or foods, especially during and after extensive exercise, helps support optimal physical function and recovery.