Kneel with elbows and forearms resting on a stability ball, hands at the apex of the ball and elbows bent and close to the sides. Torso should be in neutral in a straight line with the hips and up off the ball. Feet are resting on the ground. From this position, extend the shoulders forward, rolling the ball out away from you. Keep the abdominal muscles engaged throughout the entire movement. You should feel tension in the abdomen as you roll the ball out away from you. Inhale as you roll the ball out away from you, and exhale as you bring the ball back to starting position. You shouldn’t feel any discomfort in the low back.