Wrote earlier and forgot to mention my ongoing saga of debilitating shoulder and arm pain and numbness. Turns out that it's all due to osteophytes in my neck and that, at some point in the distant past, I actually managed to damage two discs (visibly compressed and out of shape in the x-ray) and break my neck without knowing it. I'm scheduled for an MRI and cortizone injections in my neck vertebrea but, in the midst of all this, I've cleaned out the whole basement, moved my shop (lots of heavy lifting) and been turning lots of Christmas presents, and now find myself ALMOST TOTALLY SYMPTOM FREE!!! My doc says that "motion is the lotion" for arthritic/ligament pain and that movement exercises(active and passive stretching and posture building) and resistance exercise (weight training) are requisite. I guess getting active and doing some varried work was the trick. It's working for me so far anyway.
I get the sense that there are two major problems we keep running in to. One is repetative motion and the other is being out of shape. Lots of stretch and exercise breaks and varrying positions for standing and holding tools are two easy solutions that are working for me.
Good luck and Merry Xmas to all,
Dietrich