Shoulder Tendonitis and Impingement

What Is Impingement?

The shoulder is a very mobile joint and its movement are controlled by the rotator cuff and deltoid muscles. The rotator cuff is a group of four deep flat tendons that blend together to surround the shoulder joint and hold the ball (humeral head) firmly within the socket (glenoid).  Any problem with these muscles and their tendons’ function can cause the shoulder to ride up and rub against the bone on the top of the shoulder (acromion) causing jamming of the tendons (impingement).

What Causes Impingement?

There are three main causes:

  1.  Lack of rotator cuff muscle strength or control
  2.  Loss  of  shoulder  flexibility  (especially  the  capsule at  the  back  of  the  shoulder)  causing  the shoulder to hinge forward and jam on movement
  3.  Lack of space between the humeral head and the acromion

Rotator Cuff Tendonitis and Impingement

Shoulder impingement and tendonitis are common problems in the shoulder but usually settle with time,  simple  exercise  and  avoidance  of  aggravating  activities.  Some  people  are  more  prone  to developing  these  problems  due  to  the  type  of  activities  they  do,  the  shape  of  the  bones  in  the shoulder, or muscle imbalance.

Download our information sheet to learn more about Shoulder Tendonitis and Impingement and treatment options.