Hey whatever2013 im your same stats, only im 70. I USED to be able to walk over ten miles at a shot. Now, geez. Its hard to believe how little i can do now, how long it takes me to recover, and esp how much i have to hold back on how much i exercise as i try to rebuild myself. Its not like you get out of breath, right? It seems like you SHOULD push yourself a little more. WRONG! I do waaaay less, even tho it feels lije im quitting, and i live to exercise another day. And results come faster than i expect.