Electrolytes play a vital role during exercise by helping maintain fluid balance, nerve function, and muscle contractions. Key electrolytes such as sodium, potassium, magnesium, and calcium are lost through sweat and need to be replenished for optimal performance. An imbalance can lead to cramping, fatigue, and decreased endurance. Hydration strategies that include electrolyte-rich beverages are essential, especially during prolonged or intense exercise, to support ongoing physical activity and overall athletic performance.