Ardha Matsyendrasana is done by sitting down and placing your left leg near your right leg. (Remember to bend both the legs). Then hold your left leg with your right hand hear the ankle and twist your body to the left side. Place the left hand on the floor or on your back. Point the chin towards your left shoulder. Repeat the same same procedure for doing the asana from the opposite side. The benefits of this asan are that it makes your spine flexible, helps to reduce Diabetes, Indigestion and gas trouble.