Key difference in this exercise is that it does not have a certain cardio workout. 2 days of rest each week, concentrates a lot more on equilibrium, even more tools is required, the workouts are harder on a technological level, the phases have a bigger distinctions. With the initial variation, your stages are much more structured. As for trouble, if you have done P90X, then you could anticipate the same level of difficulty but in different locations of your fitness. The new version is definitely focuses on transforming you into a sportsmen. P90X does an unparalleled task of building a foundation for throughout fitness, however this definitely takes your physical fitness to an additional degree and conditions your physical body with balance, power, explosiveness, stability, dexterity, and flexibility.