The TuneUp Program

Subscapularis is the large flat muscle that covers the anterior surface of the scapula, attaching on to the front of the humerus. Teres major originates near the inferior angle of the scapula and forms part of the posterior border of the axilla as it rises up onto the front of the humerus. They both medially rotate the arm at the shoulder joint.

Subscapularis is part of the rotator cuff group that helps stabilise the shoulder joint. It is similar anatomically to the iliacus that covers the inside of the pelvis and attaches on to the femur aiding in its medial rotation at the hip joint. As part of the hip flexor Iliopsoas, iliacus is an important postural muscle and subscapularis also plays an important role in upper body posture.

The relaxation exercises that focus on opening the chest will all help you relax both medial rotators and you'll notice a difference in the openness of your chest after you've treated them.