Help, I really need some advice and I feel lost.  Last year, I trained for a marathon...I completed my 24 mile training run, but was not able to run in the marathon due to injury.  I have struggled with rehab over the last 9 months and it is time to start training again.  I'm running three days a week now, usually 5-6 miles each time and I cross train 3 days a week.  I push myself hard on the crosstraining (at least an hour of cycling/elliptical).  I'm looking at training plans that only have me running 3 days a week because I really feel my legs need the extra recovery, but the plans only call for 20-30 minutes of cross training on off days.  Should I cut back to meet the plan and avoid injury or should I continue to push my body with what I am used to doing?  Also, does anyone know of a good plan to follow for marathon training that only runs 3 days per week.  I'm struggling to find something that seems reasonable.  Thanks for your help.