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Forward movement away the midline of the body; moving the scapula away from the spine during prostration of the shoulder girdle. Typically accompanies Shoulder Internal Rotation, Transverse Adduction, and Tranverse Flexion. 1  Serratus anterior. 2  Pectoralis minor. 3  Levator scapulae.
During the exercise, the serratus anterior, rhomboids and pectoralis minor stabilze the scapula so that the humerus can move from a stable base. Lie on a horizontal exercise bench with your knees bent and feet flat on the floor. Hold a dumbbell in the palms of both hands with your thumbs surrounding the handle.