The BOSU Balance Trainer Pro is designed for fitness professionals and commercial gyms. The BOSU Pro includes an upgraded bladder, heavy-duty base. The BOSU Balance Trainer is by far the most popular piece of fitness equipment on the market today. Its unique design makes it perfect for personal training, sports conditioning, rehabilitation, balance, core and boot camp workouts. The BOSU is known as a Total Training System because it allows users to work on and improve everything from cardio and strength to balance and flexibility!