I was just napping (3:15 p.m.) in the recliner and as I was falling asleep I realized it is probably the only time when I can totally relax the muscles in my shoulder. In tai chi we learn to keep our shoulders down so we can be relaxed and breathe deeply. If we hold our shoulders up, our breathing rises to the upper portion of our lungs and we don't get enough oxygen.
If I keep fighting gravity, my shoulder hurts more. The more my shoulder hurts, the tighter I hold the muscles. The tighter I hold the muscles, the more my shoulder hurts. And on and on.
Just an observation.