Increase balance and core strength with this Athletic Works 75cm Anti-burst Exercise Yoga Ball with Pump. Get it for just $9.73 at Walmart. (regularly $15.99) You can also get it in a 55cm size for the same price. The size of ball you want will vary depending on your height. Be sure to select free in-store pickup to avoid shipping fees. Otherwise orders of $35 or more will ship free.
