what training were you doing as a middle distance runner?
if you were a middle distance runner, V02 max is not the limiting factor - so i do agree with you, you are not wrong by needing to increase the miles to get better at longer distances !
i suspect you are better on the track than long distance - so i'd suggest getting back to the track and carrying on with interval sessions as this will give you a major advantage over other runners.
you can run 3 times a week (with once a week at the track) and then work from there. perhaps 15k is far too ambitious. you ideally should start with 3 miles x 3 times a week and work up to a long run, 2 (or 3) regular runs and an interval session.
you'll do much better than you exceptions. you just need persistence. good luck.
Last edited by Revenged; 20-11-2009 at 23:04.