Cardio X is just one of the many workout DVDs in the P90X collection. Interestingly, however, it’s one that you don’t even have to touch if you don’t want to. Yes, you can do the entire P90X workout program without ever seeing what P90X Cardio X is all about. As a matter of fact, it isn’t even included in the Classic Approach workout calendar. So, what is it and why is it included?

P90X Cardio X is a purely cardio workout. It does serve several purposes despite not being on the P90X Classic Approach calendar.

First, Cardio X plays a big role in the P90X Doubles Approach. If you are already quite fit or have completed the entire P90X 90 day program, you may be up for the P90X Doubles challenge. P90X doubles increases the number of workouts you do each week, ensuring that your body has a progressive challenge ahead of it, ensuring greater results. Beginning in Phase 2 of the Doubles approach, you will add P90X Cardio X to three of your workout days.

P90X Cardio X is also part of the P90X Lean Approach. In the quest to burn fat without bulking up, many women choose the Lean approach, hoping to get slim and lightly toned definition. Cardio X is a great workout for this system as it keeps the heart pumping without sacrificing muscle tone.

For all P90X approaches, however, P90X Cardio X is also a good substitute. If one of the cardio workouts in the series gives you a hard time or if you simply aren’t up for Plyometrics one day, using Cardio X ensures you get a good cardio workout without the intensity of some of the others.

Cardio X strikes a balance between working hard enough to get an excellent workout but keeping you below your anaerobic threshold to ensure you don’t burn off any muscle in the process. Next time you’re due for a cardio workout, give P90X Cardio X a try.