P90X

From Wikipedia, the free encyclopedia

P90X, or Power 90 Extreme, is a home exercise system developed by Tony Horton in conjunction with Beachbody and director Mason Bendewald. It claims to improve physical fitness in 90 days through a rigorous segmented training program combined with a nutrition and dietary supplement plan.

P90X’s advertising emphasizes “muscle confusion”, a method of cross-training and periodization achieved through switching the order of exercises and incorporating new and varied movements. Muscle confusion prevents the body from adapting to exercises over time, resulting in continual improvement without plateaus.