Is cycling a good alternative!!

Today I spent 2 1/2 hours riding my sorry ass, up 1000ft of roads. By the end of it, I couldn't, if i wanted, go up any more hills.

felt terrific for doing it it, but is 21 miles of cycling, going to improve my running?

Well, it should help with my CV, as at times my lungs where popping out of my mouth. So hopefully, the next time I run, I should be able to go a little further (fingers crossed).

No doubt I will let people know how much of a superman I was today :)