Sit down face up on stability ball bending your legs so that your torso is diagonal to the floor. Securing the band either around and an immobile object or use the door attachment, face away from the door. Make sure that both lengths of the band on either side are equal, take the bands and press one out and up in front of your face with one arm and bring the band handle out squeezing the Pec as you press out then return to the start and repeat making sure to do the same amount on the other side until you complete the set.