You’ve heard of P90X: the wildly popular, grueling series of workout DVDs. More than 3.5 million copies have been sold in the past seven years. Its a heart-pounding, 90-day routine, and it works by mixing elements of body-weight training, cardio, yoga, and martial arts.
The standard P90X package costs around $120, and comes with 12 workout DVDs, a 100-page fitness guide, a nutrition plan, and a 90-day calendar to track your progress. Workouts are designed to create “muscle confusion,” keeping the body from adapting to the same exercise and preventing plateaus.
Some big names have latched onto the program, from politicians to pop stars. Can you guess which of the following celebrities have, at least at some point, reportedly sworn by P90X?