Frozen Shoulder: Are Your Exercises Targeting The Frozen Part?
Do you suffer from a frozen shoulder? Have you tried performing shoulder exercises to improve the mobility but still experience pain even after all the effort? Do you notice in the mirror that you could lift your arm higher but at the same time your shoulder movement looks strange? If you have answered yes to the above questions, continue to read on and find out what could have happened.
Let’s start by having a quick revision of the construction of the shoulder joints…
A ball (humeral head) and a socket (glenoid fossa) forms the shoulder joint. This joint is also called GH (gleno-humeral) joint. The ball represents one of the ends of the arm bone (namely humerus), and the socket is well located on the outside border of the shoulder blade (namely scapula).
Muscles attach the scapula to the spine and rib cage. This connection is called the ST (scapulo-thoracic) joint. A combination of the lifting of the arm bone, and upward turning of the scapula (which is clockwise turning for the left scapula, and counter-clockwise turning for right scapula) achieves arm lifting. The combination of GH joint and ST joint achieves the lifting. With a full shoulder lifting of 180 degrees, the GH joint contributes about 2/3 to the total movement (about 120 degrees) and the ST joint contributes for the remaining 1/3 of the movement (about 60 degrees).
In frozen shoulder, the joint that is frozen is the GH joint, while the ST joint remains “unfrozen”. Since we know that the two joints move together to achieve arm elevation, it’s not hard to conclude that if the GH does not move enough, the ST move extra! This is where the movement problem starts. The shoulder blade usually moves extra in the following a few ways: it elevates extra, it tilts forward extra, it upward rotates extra, or the combination of those extras.
Why Do I Get A Frozen Shoulder?
When the arm raises (either to the front or from the side), the shoulder shrugs excessively; the hand attempts to reach behind the back, the shoulder tilts forward excessively. The results of these movements are that the relative position between the scapula and arm bone is disrupted. This causes the tendon of the rotator cuff to be irritated or compressed. This can be found as one type of secondary impingements of the rotator cuff.
It is important not only to focus on how high you arm is rising during frozen shoulder rehabilitation exercises. It is also important to look at which joint is contributing to the movement.
The followings are some recommendations to help you perform your shoulder movements more effectively.
|Shoulder movements||Common movement errors||Recommendations|
|Forward lifting or sideway lifting|
|Hand behind back|
Experiencing shoulder pain? Click here to find out more about physiotherapy for shoulder pain relief and how Core Concepts can help
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