An electrolyte is a mineral in the body that carries an electric charge, important for various physiological functions, especially in athletes. Key electrolytes include sodium, potassium, magnesium, and calcium. They play crucial roles in regulating hydration, nerve function, muscle contractions, and acid-base balance. During intense exercise, athletes lose electrolytes through sweat, which can lead to cramps, fatigue, or even heat-related illnesses if not replenished. Maintaining the right balance of electrolytes ensures optimal performance and recovery, making it essential for athletes to consume adequate fluids and electrolyte-rich foods during and after activity.