I've been rehabbing a case of shoulder impingement for several months now (with a few trips to the physio). The actual impingement feels like it is now gone, but I'm having a few mobility issues in that same shoulder.
The main problem being that I can't do back squats without getting pain in my shoulder.
In my most recent trip to the physio, he said I should work on improving the mobility in that shoulder. He said for me to focus on things like rotator cuff stretches (e.g. in a doorway) and wall slides / W-stretches.
But I'm finding that I get a bit of pain just from doing the stretches he gave me. Which is strange because I can do all my back and chest exercises now pain-free. But my shoulder just doesn't seem to agree with anything that requires a lot of mobility.
Could it be that I just need to stretch more gently?
One thing I have noticed however, is that stretching around my anterior deltoid like the below feels pretty good (as though it is what my shoulder has been crying out for):
I tend to do the above with something to grip my hand on, so that I can stretch it more, rather than just moving my arms behind me