Body-Solid Non-Bounce Slam Balls - What are non bounce medicine balls used for? Body-Solid Tools Slam Balls are non-bouncing, non-rolling balls designed to add a bit of cardio to your regular strength training. Slammer balls help you improve core strength, conditioning and explosiveness by maximizing your full body throughout the motion. Non-bouncing heavy balls are the perfect tool for exercises typical medicine balls can't do including: wood chops, slams and overhead throws. The surface is textured to ensure a proper grip during challenging workouts and rigorously tested for extreme durability and encased in an extra thick durable rubber shell. These slamballs are built to last through even the heaviest of workouts. Beneficial to athletes of all size and skill levels.