Hi Caz,
I come across and treat frozen shoulder fairly regulary (I have a practice in London's City, lots of stressed people).
The term frozen shoulder is used as a blanket term for many types of dysfunction. It could be a number of things; fibrosis in the joint capsule (true frozen shoulder), impingement syndrome (where the tendons of one or more of the muscles of the rotator cuff get snagged under the acromion process), trigger points causing dysfunction of the rotator cuff muscles which messing up the timing of the scapulo-humeral rhythm... etc.
In all cases, because the client can't take the shoulder through it's full range of motion, there's a tendency for the muscles of the rotator cuff to shorten (and in long term cases, atrophy) thereby accentuating the problem.
If you don't know how to test to differentiate the cause of the problem, then a solid approach would be twofold:
First, focus on releasing and lengthening the rotator cuff muscles and the other muscles that attach to the scapula and humerus (subscap, lats, serratus anterior, rhomboids etc).
Then, perform traction on the whole shoulder to encourage inferior glide. Translated this means gently but firmly (with consistent pressure) pulling the whole arm inferiorly whilst encouraging the client to relax or "let the arm go" at the shoulder. Then lots of MET to increase lateral rotation to allow the greater tuberosity of the humerus to roll under the acromion during abduction. Then MET to increase flexion and abduction in all planes (coronal, scapula and sagittal) of the shoulder.
It's a tremendous challenge but you CAN make a difference - as indicated by the thoughts of the other therapists who have contributed to this discussion.
Hope this helps. Let us know how you go.
x
Henry