VAKRASANA

Sit erect and stretch legs out. Raise your right knee until your foot rests by the side of the left knee. Place your right hand behind your back without twisting the trunk too much. Then bring your left arm from in front of you over the right knee. Place your left palm on the ground near the heel of your right foot. Push your knee as far as to the left arm.
Twist your trunk to the right as much as possible. Turn your face to the right over the right shoulder. Release and repeat on the left side.
This asana tones up the spinal and abdominal muscles and nerves and activates the kidneys, intestines, stomach, adrenaline and gonad glands. It relieves cases of constipation and dyspepsia.