Lie down on your back and stretch both your legs. Now leaving the left leg stretched on the ground bend your right leg at the knee and bring the bent knee near the chest. Now inhale and press your bent legs towards the chest. Keep the breath full in your belly and go on pressing the leg on it. Stay in this position for some time. Now start exhaling, lift your head and try to touch your bent knee with your nose. Inhale and bring your head back in normal position and slowly take both legs down and exhale.
This asana regulates wind in the body. It brings the flatus down. So that it can be easily eliminated through the anus. It also helps to eliminate constipation. It also helps to cure the disease of lung and heart. Obesity can also be checked.