'Shashanka' in Sanskrit means the moon.
Position of Readiness
Sit in the Vajrasana position and hold your ankles with hands of the same side.
Take a deep breath and raise both the hands in one line with head up (palms facing each other).
Bend forward while exhaling and let the forehead touch the ground.
Retain this position as long as you feel comfortable and come back to Vajrasana position. Relax for some time and repeat the asana.
Shashankasana can be performed three to five times in succession.
It exercises the lower abdomen and improves digestion. It also relieves stiffness of the spine. Yoga-Mudra and Shashankasana produce similar beneficial effects. It remedies uterine inversion.
When the forehead touches the ground, the buttocks should still remain on the floor.