Origin of My Marathon Training Plan

I want to train at 45 miles per week for the 12 weeks prior to the marathon because medical studies have shown marathoners with this level of training do not develop cardiac arrhythmia's like runners with less training.

My marathon training plan is based on the book Daniels' Running Formula. I use the Vdot tables for my latest 5K time to determine my Easy, Interval, Tempo, Marathon and Race paces. A table of common race lengths and training runs for my current Vdot is posted above. I run hard/easy with two easy runs after my long run. I use Daniels' guidelines for the length of the three hard runs, Intervals (6-8% of weekly mileage), Tempos (8-10%), and Long (25-30%).