Sun lies in the root of the navel, (solar nerve/solar plexus) and the moon (the lunar nerve) lies in mouth at the root of palate. The sun with its radiance pulls and consumes the nectar, which is secreted by the body and man is overpowered by death. To save that nectar, the sun is lifted up and the moon is lowered down, it is known as the Viparitkari Mudra. The method to do it is such that one should stabilize head on a small cushion on the ground in between palms of both the hands and raise feet upwards and stand straight on head. One who does this mudra every-day, the old age does not bother him.