[header] How to do a seated hip roll with an exercise ball [title] Have your exercise ball in a vacated space. [title] Sit down on the ball with your legs in front of you, knees bent and feet on the ground. [step] Walk yourself forward slightly, but don't walk forward so much that you're fully lean your back against the. 
With your arms resting at your sides you should now be in a neutral position. Inhale and prepare to begin the exercise.