probably the hardest workout ever put on dvd. >> every day was a struggle but i pushed myself and i got further and further. >> announcer: there's a method behind the madness... shaun t.'s max interval training. traditional interval workouts feature extended periods of moderate exercise interspersed with short bursts of intense effort. but shaun flipped that on its head. with max interval training, you do extended bursts of intense exercise and only stop long enough to catch your breath. >> how's max interval training feel? >> whoo! >> announcer: this revolutionary training method produces record-setting results. with max interval training, you can lose 30 pounds in only 60 days. >> in the first 60 days, i lost 38 pounds. >> announcer: that's a year's worth of results in just two months' time. so... choosing insanity's not so crazy after all. and with insanity, you don't need to spend endless hours in the gym to get results. it's about 40 minutes a day right in your own home. in month 1, you'll do five different max interval