Side Plank with Elbow on Swiss Ball

Lie on your left side with your knees straight. Place your forearm on a Swiss ball. Prop your upper body up on your left elbow and forearm.

Brace your core by contracting your abs forcefully as if you were about to be punched in the gut. Raise your hips until your body forms a straight line from your ankles to your shoulders. Breathe deeply for the duration of the exercise. Hold this position for 30 seconds (or as directed). That's one set. Turn around so that you're lying on your right side and repeat.