Though P90X is one among the six versions of the power90 workout series developed by the Beachbody Corporation along with some world famous fitness experts, its popularity raised to heights in comparison with the other versions like the Power Master Series, P90X One on One etc. There is also a frequent content updating strategy adopted by the firm and the experts behind this. This update has now resulted in the new version of P90X2. Here too the key factor is the muscle confusion, but with more rigorous workouts, synergic and combo moves. The program also gives emphasis on certain aspects available with the sports science alone. Like the previous versions there will be three phases of the workouts. These are the foundation, strengthening and performances phases. There will be provision for new fitness equipment like the foam roller, medicine balls etc. For more details you can click on the Help / FAQs link.