Purpose: Many swimmers have the stereotypical "swimmers posture", which included rounded shoulders. This position can increase pressure and cause irritation of the rotator cuff muscles. This mobilization can improve the mobility of the pectoralis muscle.

Directions: Lie on your stomach and place a tennis ball on the upper, outer portion of your chest. Place the tennis ball as close to your shoulder as possible, with the ball still on the muscle. You may need to position your arm diagonally to allow your arm to relax with your head rolled towards the arm being mobilized.

Hold for approximately 2 - 3 minutes.