This week, focus in the training sessions is incorporating core exercises into your training.
Just a suggestion as you will find what works for you.
In the last 7 weeks of my marathon training Wednesday's are 4 miles with core exercises; some weeks I'll do this in the morning and run later, others I'll add them before, after or during the run.
My set is as follows:
- push ups
- calf raises
- pistol squats
- glute bridges
- wood chops
- superman from the floor
10 reps of each with at least one set; preferably 3.
The focus on these are stability and control to support your running.