Diet and Exercise: I found out today that if I slow down the speed, I can up the incline and still be OK. I still hobble a bit when I get off, but there are no more shooting pains. I think I'll stick with that strategy--more incline seems to give me a better workout than more speed anyway. Still doing the yoga, and still loving the chance to stretch my back out. I've been pretty lucky with the lack of back pain--it seems to be all in the front for me.