Write the next sentence in the following story.

How to do side planks with an exercise ball
Put your exercise ball in an open area.
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.
Kneel on an exercise mat with the exercise ball next to you.
It doesn't matter which side the ball is on first since you'll eventually work out both sides for this exercise. Lower your upper body to drape over the exercise ball.