This is my mostly cardio running plan. My rest days I allow cross-training which I decided would be Tae-Bo. I didn't plan anything for Sunday but if I'm feeling motivated, I'll do some cross-training. My only strength training is push-ups, sit-ups, side crunches and dips (using edge of chair or desk). Starting with about 3 sets of 10 reps each and working my way up as my strength improves.