Anoop | Tue December 07, 2010 
Hi James,
That’s a really good question. It seems logical that people with greater internal rotation will not have tight posterior capsule. But it’s not the case it seems.
It has been shown in resistance trained individuals that they have limited IR. The same goes for overhead athletes, especially basball pitchers.Though they use the IR to propel the ball, their IR is seriously limited compared to ER.
I think the discrepancy is because in posterior capsule tightness we are talking more about soft tissues that just muscular tightness.
| Fri October 14, 2011 
I have issues with overhead work. I can deadlift 200kg, squat 160kg and military press 90kg but I struggle to hold an empty olympic bar overhead and squat. The shoulders just won’t take it. Is it a mobility issue? I’ve tried these stretches with no results.
Anoop | Sun October 16, 2011 
Yep it is a mobility issue. Most people who lift weight and don’t stretch have trouble with overhead squats.
I do think regular stretching will help. Have you tried PNF?