Attach the band to the bottom of a door or an immobile object in front of your feet then lay down face up on a stability ball and grasp on to the band handles, keep your arms straight and parallel to your torso slowly bring the handle of one side toward your shoulder in an arc in front of your body keeping the upper part of your arm locked to your side, contract the bicep and then slowly return to the starting position and repeat, do the same amount on the other side until the set is finished.
