When standing, we often make the mistake of tipping the top of the pelvis forward. Over time, this puts undue stress on the back. Practice this move to help you return your pelvis to neutral alignment and minimize the pooch below the navel. Make sure you pull your abs inward throughout the move without tightening your buttock muscles. Be sure that you are lowering your legs to only a 45-degree angle -- taking your legs too low will prevent you from doing the exercise correctly.
1 Lie face up on a mat. Hold a large stability ball between your calves. Bend your knees slightly if necessary and position your ankles directly above your hips. Extend your arms above your shoulders, palms turned inward. Inhale to begin.