Kneeling thoracic rotation
Kneeling exercise in which the upper back turns as one elbow moves between a downward and upward position.
Sit close to your heels with your knees wide and feet together. Place your left hand on the floor and right hand behind your head. Point your right elbow down and look toward it.
Turn your upper body and move your right elbow toward the ceiling. Follow the elbow with your eyes and keep your left hand and knees still. Turn back until the elbow points down again.