I tend to keep to pretty much the same exercise schedule, with a few substitutions as necessary. Here’s an example of a typical week for me:
Marathon Training Schedule (May 2012 – October 2012)
Monday: Run (short)
Tuesday: Lower body strength training (details here) + Moderate Intensity Cardio (~20 minutes)
Wednesday:Upper body strength training (details here) + Moderate Intensity Cardio (~20 minutes). 1 hour of yoga.
Friday:Rest or light cardio (a walk, for example)
Saturday: Run (long & slow).
Sunday: Swim or light cardio
Wednesday, May 30: 30 minutes upper body strength training; 30 minutes stepmill; 1 hour yoga.