When To Exercise Your Shoulder:
Shoulder exercises should be performed under the direction of a physician to ensure the proper muscles are being targeted for your condition. It is also important if surgery has been done to only perform exercises that will not overly stress any surgical repair in the shoulder.
Why Shoulder Exercises Should Be Done:
The second important aspect of shoulder exercises is to strengthen the muscles around the shoulder. It is important to not stress the rotator cuff muscles of the shoulder. These muscles may be susceptible to injury and inflammation if improper exercises and activities are done.
Stretching A Stiff Shoulder:
The most common cause of a stiff shoulder is adhesive capsulitis, also called a frozen shoulder. This condition can arise independently, or as the result of immobilization after a shoulder injury or shoulder surgery. Shoulder stretches are important for treatment and prevention of a frozen shoulder.
Simple Shoulder Exercises:
The simplest shoulder exercises are called pendulum exercises. These are performed by bending forward to allow your arm to hang down towards the ground. Small circles are made with the hand, allowing momentum to carry the arm around effortlessly.
Strengthening The Rotator Cuff:
The rotator cuff muscles are not the large lifting muscles of the upper back and arms. The rotator cuff muscles can be exercised with little or no weights. If more weight is being used, the exercises are probably being done improperly.
Upper Back & Neck Stretches:
Source:
"Shoulder Surgery Exercise Guide" American Academy of Orthopaedic Surgeons. 2007.



