In this video you'll learn how to do the 100 and ab series using a Magic Circle. This is for an intermediate/advanced client. If you don't have a magic circle you can use a pillow. If you want to buy a magic circle I recommend this one: https://www.amazon.com/Stamina-05-0020B-Pilates-Magic-Circle/dp/B000W09NYM/ref=sr_1_1?ie=UTF8&qid=1476400464&sr=8-1&keywords=pilates+magic+circle
