11. Cardio X

11. Cardio X

This low-impact cardio routine can be used in a variety of ways to meet your P90X goals. Use it in addition to your standard P90X workload when you want to burn some extra calories, or as a substitute if your body needs a break from the program's high-impact workouts. Whatever your reason for using Cardio X, you'll find it to be a fun, full-throttle, fat burning workout that will leave you feeling lean and mean.