I damaged both of my shoulders in separate incidents. Unfortunately, they were not impressive cycling injuries, or even the result of kamikaze dog walks. I'm embarrassed to say that I did them both in bed. And NO - I was ALONE at the time. And NO - I WAS NOT DOING
THAT EITHER - wash your feeelthy minds out!
Injury #1: The morning alarm went off on my little bedside table. I stretched my left arm out from under the covers and fumbled for the clock. I couldn't quite reach it so I stretched further but knocked the clock back towards the wall. Rather than sit up and turn to face the clock, I did a really stupid lunging back and twisting motion with my left hand. Cue AGONY from left shoulder!
Injury #2: Many months later (when my left shoulder was only about 50% recovered) I was sitting up in bed reading. I had piled up some pillows behind me but was not comfortable so I reached back over my right shoulder with my right hand. I took hold of the top of the uppermost pillow and pulled it but it didn't move. (I didn't realise at that point that it was never going to move because I was sitting on the other end of it!) I yanked at the pillow and .... Cue AGONY from right shoulder!
That shoulder also took many months to stop hurting in everyday life. The injuries were caused about 10 years ago now and finally my shoulders don't hurt as long as I don't do much with my arms above shoulder height. I still can't use my chin/dip station. I think I am going to have to do some gentle shoulder exercises and build them up gradually.