Place a stability ball against a wall and gently lean against it, positioning the top of the ball into the small of your back.
Your feet should be hip-width apart with toes facing forward or turned out slightly.
Pull your shoulders blades down and back. Do not allow your low back to pull away from the ball. Gently lean into the ball, as you shift your weight into your heels.
Inhale and begin to lower the body, keeping the tailbone, low and mid-back against the ball as you bend your knees.
Push back with your hips, allowing them to drop under the ball. The ball will glide down the wall with you as you lower your body toward the floor. Do not move the feet. Continue to lower yourself until challenged or until your thighs align parallel to the floor.
Exhale and slowly push up away from the floor. Extend your hips to bring them back underneath your body. Continue pushing upward, returning to your starting position. Repeat.