The side plank with elbow on a Bosu ball increases strength and stability throughout the core with an emphasis on the oblique muscles. Performing the exercise on a Bosu ball adds difficulty to the move.
Lie on your side with your bottom elbow on a Bosu ball and with your feet staggered on the ground. Your top foot should be in front of your bottom foot.
Raise your hips so that they're off the ground and your body forms a straight line from your ankles to your shoulders. Hold, return to starting position.
Avoid allowing your torso to bend during the exercise. Try to keep your body in a straight line the entire time.
Do not let the hips sag during the side plank. Keep your core engaged and your hips up the entire time.