I wanted to share something that may help others. Yes, many probably know this, but in case you do not, here you go...
** Cliff Notes: Sleeping on something too soft caused major complications including a partial cuff tear - sleeping on something harder now is fixing it - if not fixing it is helping it immensely **
Here is the whole story:
I had a slight pain in my shoulders before I started lifting again 4.5 months ago. Once I started lifting it started getting worse and worse until I tore a muscle in my rotator cuff.
I went to a Sports Doctor, tests, xrays, etc, diagnosed a partial tear in one of them muscles in the cuff. 2 Shots of Cortisone, 3 weeks of no shoulder/chest exercising at all, then weeks of painful physical therapy to remove the impingement I had, the doc said it was probably a learned behavior from years of doing something wrong. It was this impingement that made me misalign and rub bone on muscle and cause a tear when benching - anyhow after all the PT the pain was gone and I thought I was all better as I had no spurs or anything else n xray and strength was back showing the partial tear had healed.
Started benching and stuff again slowly. Pain started slowly coming back though. I began to realize it was getting bad again and I would have to do something serious like surgery for it I guessed... meanwhile we were moving so this was put on the back burner.
I moved to the new house alone with family and stuff still in old house until the school year ends - so I was sleeping on a hard cot in new house. I noticed my shoulder was starting to feel better but did not make the correlation at the time.
My family came for the 3 day weekend and my wife brought an air mattress for us to sleep together on. By the 3rd night my shoulders were truly killing me!!
After she left I went back to the cot and it slowly started getting better again, the cot broke!! So back to the air mattress and pain again, LOL even I am catching on at this point. - however while she was here for the three-day weekend we had bought a new couch/chaise/giant ottoman thing and it was shortly delivered.
That is very firm, but soft enough to be comfy so I tried sleeping on that - the next day my shoulders were feeling quite a bit better. 2nd night sleeping there and even better! By the 3rd night WOW!
So here it is, I don't know, maybe a week later, since I have been sleeping on the couch and my shoulders feel better than they have in ages!! Today they are sore but that is from my great chest/shoulder WO on Wed.
There are still a few movements I can do sitting here that I can feel a bit of impingement on but I have a very strong hunch that when my wife gets here in 3 weeks and we go buy a new Queen that is firm like the couch and I have room to sleep with my arms in a more natural position that even this may go away.
OK, that's the long version, So hope this maybe helps someone, I imagine some of you really old farts know all this already about the right mattress and such

but for the rest of that are new to being an old fart (like me) well if I had known this maybe I would not have gotten an impingement so bad I tore something