The key to this program’s effectiveness is stated to be “muscle confusion,” which basically means that numerous exercises are incorporated and encouraged to keep different muscle groups doing different things as much as possible. This way there is no “plateau” effect. Therefore the muscles do not get used to the routines and they continue to develop. The workout programs are named after the muscle groups that they work out, and these are: Chest and Back, Shoulders and Arms, Yoga X, Plyometrics, Legs and Back, Kenpo X, Chest, Shoulders and Triceps, Back and Biceps, Core Synergistics, Ab Ripper X, Cardio X and X Stretch. There are success stories posted on the official P90X website. This fitness program is stated to take one hour each day. A few additional supplies needed for P90X are resistance bands or dumbbells and a pull-up bar/place to perform pull-ups.

²P²90²X Extreme Home Fitness Workout sealed with Guides US $96.99 End Date: Tuesday Sep-14-2010 14:33:22 PDT Add to watch list