Lasts again?

My left leg and arm continue to deteriorate.  I've just come back from a wonderful visit to see friends and eat great food and see great sites in Thailand... but for how long will I be able to do things like that?  As it was, there were a lot of things I was unable to see and do, though with the help of my great friends and wife, I didn't feel as left out of things as I could have.  Now that I'm back, I'm back into my regime of swimming, physio, pilates, yoga, working out... all with the hope that I can slow down the effects of the (apparently) relentless deterioration.  *sigh*