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Subscapularis

Subscapularis is one of the four rotator cuff muscles. The muscle also acts to hold the head of the humerus in position and prevents it moving forwards.

Origin

• Anterior (costal) surface of the scapula

Insertion

• Lesser tuberosity of the humerus

Actions

• Internal rotation
• Adduction

Innervation

• Upper and lower subscapular nerves

Daily uses

• Tucking the back of your shirt into your trousers

How can I stretch it?

• External shoulder rotation stretch

How can I strengthen it?

• Internal shoulder rotation with a dumbbell