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Isometric shoulder external rotation exercise

Isometric shoulder external rotation
Isometric shoulder external rotation

To perform the isometric shoulder external rotation :


  • Stand with involved arm at side with hand against wall or door frame as shown.
  • Push hand outward.
  • Do not hold breath.
  • Maintain the contraction for few seconds and release.
  • Repeat for 10 times.


The muscles involved in this action are infraspinatus and teres minor, posterior fibers of deltoid.

Deltoid Muscle :

This thick muscle covers the shoulder protecting the joint. It assists in many movements of the arm, moving it forward, backward, and outward abduction.

It arises from two bones and three places: from the lateral third of the clavicle, from the acromion, and from the spine of the scapula. The fibers cover the shoulder joint to merge as a small tendon which inserts onto the deltoid tuberosity, a small projection on the lateral aspect of the shaft of the humerus, about midway down.

 

Teres Minor: Modulates action of deltoid, preventing humeral head from sliding upward as arm is abducted; adducts and laterally rotates humerus.

The origin is from Lateral border and adjacent posterior surface of scapula

The insertion is into Greater tubercle of humerus; posterior surface of joint capsule

 

Infraspinatus: Modulates action of deltoid, preventing humeral head from sliding upward; laterally rotates humerus

The origin is from Infraspinous fossa of scapula

The insertion is into Greater tubercle of humerus