I've recently started doing hills/stairs with a couple of friends 2 times a week but was also hoping to restart (again!) C25K to learn to like running distances and work on my endurance. I don't want to run more than 3 days a week because my knees are bad and I don't need to be pounding on them any more than I already do, so I was wondering how to incorporate hills/stairs into C25K.
Has anyone done this? If so, did you just do hills/stairs twice a week and then a C25K day for the third day of running to extend the program much longer? Or did you count the hills/stairs days as a C25K day and on the third running day do a C25K workout?
Any help would be greatly appreciated. I don't know enough about endurance to make this decision on my own.

