This is conditioning at its best!  Non-stop movement in multiple directions will help you increase your cardiovascular endurance while improving your core strength and overall body awareness and stability.  Certified trainers will design workouts that will keep your heart rate up throughout the session - moving through exercises of cardiovascular conditioning and multiplane body weight exercises.  Accessories such as ropes, balls, kettlebells, bikes, rowers, boxes, bands, and ladders may be incorporated.  Each session is different and can be varied/modified to fit all levels.