Krav Maga Fitness - Bas Rutten Boxing Workout (Warm-Up/Cool Down with Heavy Bag, Face Mask & Arms). Our Krav Maga Fitness program integrates a lot of workouts that are specific and functional to our Self Defense and Fighting training. The workout that is used most often by our students is the Bas Rutten Mixed Martial Arts Workouts. This video shows how to perform the Bas Rutten Boxing Workout on a heavy bag with the Title Boxing Heavy Bag Striking Mask and MaxxMMA X-Arms attached to it. Here are