How to Do a Side Plank on a Stability Ball
Doing side planks on the floor works your rectus abdominis and obliques. By shifting your upper body to the ball, you increase the stress on your entire core, which includes not just your abs, but also your hip and back muscles. This exercise is challenging, so if you struggle to maintain proper form, try an easier variation: Either drop one knee to the ground or ask someone to help you hold the ball stable.
