In this asana one has to acquire the pose of a Cobra. Lie down with your face downwards and legs closely held together. Let your palms touch the ground below the shoulders, but fully apart. Pressing the ground with your palms, raise the elbows a little.
Start inhaling and raise your front part, your head and chest, upto the navel. Bend your chest and abdomen to the maximum, with your head thrown backwards and eyes looking up to the sky.
This is the Cobra pose. Keep the pose for a minute or so and come back exhaling to your original position.
This asana is of great benefit to the kidneys. It gives strength and elasticity to the neck, the shoulders and the spine. It helps restoring circulation of blood to the spine. It strengthens the heart also.