Description de l'exercice:
Back Extensions on Sissel Exercise Ball
Anchor feet firmly and lie face down with the Sissel exercise ball under your pelvis and ribs. Bend your arms and place your hands by your ears. Slowly lift your torso until just your pelvis touches the ball. Do not excessively arch through the back. Release and repeat. For more intensity, hold a Sissel medicine ball to your chest. As you lower your ribs toward the ball, extend the medicine ball in front of you.