The body utilizes fat as an energy source primarily during low to moderate-intensity exercise. Fat is broken down into fatty acids through a process called lipolysis, which then serves as a sustained energy supply. While carbohydrates provide quick bursts of energy during high-intensity workouts, fats become increasingly important during prolonged activities as glycogen stores deplete. Utilizing fats efficiently is crucial for endurance athletes, as it allows for optimal performance. A diet rich in healthy fats can support this system and enhance overall energy production.