I'm at work and won't have much time to post over the next few days but I just caught this and I promise to come back to it.
The skinny:
3 runs a week, one for hills and speed intervals, one for form only and one long run. I never ran more than 15 miles in training and my long runs were slow, zone 1 to 2.
During race season I started to throw in some short runs off the bike such that I was doing 5 runs per week about but 2 of those were only 1 to 2.5 miles.
The biggest difference for me was the form work and a hard effort brick once a week.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS