Expands Pilates repertoire by linking Essential-level exercises with the versatile BOSU®* Balance Trainer. Flat on one side and domed on the other, the unstable nature of the BOSU®* Balance Trainer makes it an ideal tool for establishing and reinforcing balance, stability and proprioception while gaining core strength. Exercises performed in standing, kneeling, seated, supine and prone positions, enhance stability, strength, balance, flexibility, agility, coordination and endurance.