The Vastus Intermedius is one of the muscles of the Quadriceps that help to extend the knee. Learn more about this muscle including exercise and stretches.

The Rectus Femoris is one of the four muscles that are part of the Quadriceps. Learn more about the function of the Rectus Femoris, as well as what pain can mean and exercises to strengthen the muscle.

The Vastus Lateralis is the largest of the muscles that form the Quadriceps. Learn more about the Vastus Lateralis including its function, exercises and stretches.

The Vastus Medialis is one of the muscles of the Quadriceps and is important for the proper functioning of the kneecap. Learn more about the Vastus Medialis including why strengthening the muscle is important and exercises and stretches you can perform.