Shoulder blade moves instead of just the forearm
Scapular retraction substitutes for true glenohumeral external rotation.
Overactive muscles
RhomboidsMiddle trapezius
Corrective work
Foam RollThoracic spine↗StretchDoorway pec stretch↗Scapular retraction substitutes for true glenohumeral external rotation.
Upper arm abducts; changes the rotator cuff angle.