Thousands if not millions of people have been using P90X for the past few years in order to lose weight and get in fantastic shape
. But while this program is great for getting in fantastic shape and losing a lot of weight, it has a downside: it is 90 days in which a person really has to commit to following the program to a T in order to achieve the great results they've seen on TV.
For those people who are not willing, ready or that simply can't afford to commit to a 90 day workout program, then Insanity is a fantastic alternative.