The primary function of carbohydrates in relation to exercise is to provide a readily available source of energy. During physical activity, carbohydrates are broken down into glucose, which fuels muscles and supports sustained performance. Complex carbohydrates, such as whole grains and fruits, not only provide immediate energy but also offer essential nutrients and support recovery post-exercise. Adequate carbohydrate intake is vital for athletes and active individuals, as it enhances endurance and helps maintain optimal blood sugar levels throughout workouts.