The BOSU Balance Trainer gives you a fast, fun workout that is easy to fit into even the busiest lifestyle. The BOSU Balance Trainer program has been designed so that you can train cardiovascular or aerobic fitness, muscular strength, and endurance (especially for the ab and back muscles), and flexibility. And while you’re getting stronger and more fit, you will also be improving your balance, coordination and body awareness. What this means is that you will look better, feel better and move better in sports and fitness training as well as daily activities.