Method: Stand with feet about 18 inch apart, arms on the sides, palms facing backward. Inhaling lift arms over the head and lean backward slightly. After a pause , exhale and bend forward bringing the arms in front. Try to touch the floor if possible with your palms while keeping the head between the arms and upper body loose. After a pause, inhale and lift the arms back and repeat the asana three to five times.
This makes the spine flexible and also exercises the lungs, arms, shoulders, waist and the neck.