P90X: Transform your body in just 90 days with P90X, Tony Horton's groundbreaking extreme home fitness program. Built around the principle of Muscle Confusion™, the program combines strength training, bodyweight exercises, cardio, plyometrics, yoga, martial arts, stretching, and core conditioning to continually challenge the body and maximize results. Featuring twelve unique workouts and a structured 90-day schedule, P90X is designed to increase strength, improve endurance, build lean muscle, and reduce body fat without requiring a gym membership.