I was reading this
In Defense of Overhead Lifting by Charles Staley and Keats Snideman
and there are several tests for basic mobility/flexibility (e.g. Thomas test)
and I failed this one big time with the right arm.

and this is the description of what it means.
Quote:
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The lower hand tests the length of the external rotator muscles: infraspinatus and teres minor. Ideally, you should be able to reach the lower angle of the opposite scapula.
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but the article has little advice on what to do if this is your issue (some PNF movements, etc). So, assuming that failing this test on one side is a potential problem - what can be done for it?