If you like the idea of doing a mixed martial arts workout, then you'll enjoy this routine from Beachbody that incorporates fighting moves into one killer workout. You'll need lots of water, a towel and gym shoes to complete this workout. If you're new to this kind of workout, you might want to watch the video all the way through before diving in. If you like the idea of learning martial arts for self-defense, find out which type is right for you. How many calories you burn doing p90x3: MMX depends on your speed, weight and gender. You can see how many calories you burn doing p90x3: MMX using the calculator below.