I was never an athlete, but I did used to walk miles - and I mean miles. 10 miles in one go was nothing, and I have done more than 40 miles in a day. I also did a few 7 day long distance hikes. Now I can barely do 25 yards. It kills me. I keep hoping that if I can get inflammation under control I might get back to being able to walk a couple of hundred yards or so. The only comforting thought is that I could probably have got like this 5 or 6 or more years earlier if I hadn't pushed myself to keep up regular walking, but I do feel like an old woman now. Part of my fight is to make sure that I push to get on the absolute best treatment, as well as making sure I don't allow my muscles to completely waste away, and keep up the range of motion stuff.