Brian Schiff’s Blog

Whether you are lay person, trainer or therapist reading this blog, I try to keep you up to date on science, training and my interpretation/application of exercise based upon the research and practical application in my practice.

Today, I want to touch on an article just published in the Journal of American Sports Medicine.  It was based on a  study conducted by Tim Tyler et al in New York.  They set out to determine what effect decreasing GIRD (aka glenohumeral internal rotation deficit) and posterior shoulder tightness had on reducing symptoms associated with internal shoulder impingement.

For those unfamiliar with GIRD, it basically looks at total shoulder motion side to side but focuses on deficits in internal rotation.  Throwers often lack internal rotation on their dominant arms and exhibit excessive external range of motion for cocking and ball velocity.  We tend to call this acquired laxity.  Pitchers tend to have higher GIRD as well.  Keep in mind total shoulder motion is critical as well.  So, you cannot assume one will have problems just becasue there is decreased internal rotation.

You may see similar GIRD and psterior shoulder tightness patterns in other overhead athletes (swimmers, tennis players, volleyball players, etc.)  This particular study looked at the effect on 11 men and 11 women who received manual mobilization by a PT combined with ER ROM, posterior shoulder stretches and scapular strengthening.

They studied all 22 subjects (range of symptoms from 1 to 24 months) and then compared data on the patients with and without symptom resolution.  In effect the study revealed that posterior shoulder tightness was significantly improved in 12 of the subjects that had complete resolution of symptoms (more so than in the 10 who did not).  In addition, changes in GIRD did not seek to impact the results.

What is the take away from this study?  In a nutshell, if you have symptoms related to internal impingement, you should be doing posterior shoulder stretches.  So, what are the best ones to do?  There was a recent article in the NSCA Strength and Conditioning Journal (December 2009) that laid out some effective stretches (two of which I will show you in the video).  Also, you should note that this pattern of tightness is common in weight lifters.

I have included a short video clip with 3 effective stretches that easily can be done at home.  The stretches are as follows:

1. Standing cross chest shoulder pull (across the chest) – this is a basic stretch I start most clients with who are experiencing pain.  The drawback is that the scapula is not stabilized (or fixed) so you do not isolate the posterior shoulder effectively.  However, it tends to be more comfortable for many early on and you will still get some benefit.  When you are ready, it can be done against a wall to fix the scapula.
2. Side lying cross chest shoulder pull – this would be equivalent to doing stretch number 1 against a wall.  The floor acts to stabilize the scapula and then you pull the arm up and hold.
3. The sleeper stretch – go easy with this one as pushing too hard may actually increase inflammation in my experience.  You may also vary the angle of the upper arm to hit different portions of the joint capsule.  For example, you may elect to stretch at 90, 70 and 45 degrees.

I advocate holding each stretch for 20-30 seconds and repeating 2-3 times daily.  If you are in therapy, the stretching should be done following the joint mobilization by your therapist.   Click the video below to see the stretches.

The number of people struggling with shoulder problems is astounding. Keep in mind 36% of people working out will develop a shoulder problem. For those suffering from persistent shoulder aching/pain or a known rotator cuff issue, you will want to check out this video. I have also pasted a link to a column I wrote on this very topic for Personal Fitness Professional Magazine as well.

Link to the PFP article