I walked 12 miles last week and rode 25 miles on a 10 speed; but I suspect that there is something wrong with my heart. I am getting some bad signals and data from it. I won't be stunned if I am diagnosed with CHF, because I really felt bad after my last 25 miler. So, I am in a quandary, and I am damned if I do and damned if I don't. I do not foresee myself stopping though, because I think that I would rather die than give up.