Built to provide a wide range of movement and better replicate real life movement, the Modern Movement M Board is a fun way to improve your balance for better performance in activities like running, skiing, or surfing, as well as everyday living. . Develop dynamic balance skills while strengthening your legs and core. Harder ball provides faster movements bumper protects both the deck and the floor. Practice dynamic moves like side to side weight shifts, and toe sideheel side turns. User level: intermediate to advanced. System includes: Balance deck, 8.8 lb. medicine ball, workout DVD, and poster.