Each week you’ll have 3 or 4 core workouts per week. You should aim to fit the workouts in on alternating days, so you have at least one day of ‘rest’ in between RDA:CoreBuilder workouts. It’s OK to do other workouts on the off days (endurance, intervals, derby practice, strength training, etc.) of course, and once in a while you’ll need to do back-to-back days to keep up with the program.