[header] How to do side planks with an exercise ball [title] Put your exercise ball in an open area. [step] You should have plenty of free space to move around, and all sharp/heavy objects should be removed so as to minimize the potential for accidents. [title] Kneel on an exercise mat with the exercise ball next to you. 
[step] It doesn't matter which side the ball is on first since you'll eventually work out both sides for this exercise. [title] Lower your upper body to drape over the exercise ball.