P90X® is a comprehensive in-home fitness and nutrition program proven to
burn fat and reshape your body with lean muscle in just 90 days.
In INSANITY®, Shaun T uses a method called Max Interval Training. It's not your typical interval workout. You'll do cardio and plyometric drills with intervals of strength, power, resistance, and core training. It all happens in long bursts of maximum-intensity exercises with short periods of rest so you can burn up to 1,000 calories in an hour.
This program uses P90X as it's base and replaces certain workouts in a strategic manner to take you to the next level. If you thought P90X was tough with PlyoX and KenpoX, give it a try with Insanity workouts as substitutes