Electrolytes are essential mineral ions that play a vital role in maintaining hydration, nerve function, and muscle contractions during exercise. Key electrolytes include sodium, potassium, calcium, and magnesium. As individuals sweat, they lose these minerals, which can lead to dehydration and impaired performance if not replaced. Consuming electrolyte-rich foods or sports drinks during prolonged physical activity helps maintain balance and supports endurance. Proper electrolyte levels are crucial for optimal physical function, helping prevent muscle cramps and ensuring efficient recovery.