P90x3: Pilates X is a workout from the trainers at Beachbody. This workout will have you using your core as you go through the various movements. The routine is low-impact, so it's good for people who have joint or ligament issues. It's taught at a faster pace and is great for any level, but might be a bit challenging at first. For another Pilates workout to help strengthen your core, click here. How many calories you burn doing P90x3: Pilates X depends on your speed, weight and gender. You can see how many calories you burn doing P90x3: Pilates X using the calculator below.