Half Roll Down with the Mini Body Bar is a variation of original Pilates exercises that helps strengthen the abdominal muscles and increases the flexibility of the spine. Be sure to choose a bar that is not too heavy (we use four pounds) as you do not want to over-challenge the shoulder girdle stabilizers! Adding biceps curls to this exercise targets both the arms and the absâ¦what could be better! Please visit www.PilatesOnFifth.com (for more info), www.UltimatePilatesWorkouts.com (for more videos), www.Shop.PilatesOnFifth.com (for store.)