Sasankasana(The rabbit or the crescent moon posture)
There is a belief that the original name was sasaka(Rabbit) Asana(posture). In the final stage of this asana, the body resembles a rabbit or Crescent Moon.

How to do Sasankasana:
Sit in erect with legs been stretched, Keep the heels together, Palms should be pressing on the floor by the side of the buttocks.
1. Gently bend the right leg and keep the heel tight under the buttocks.
2. After that bring the left leg to under the left buttock.
3. Keep the knees in a position that close to each other.erect the spine and head, shoulder and buttocks in a vertical line.
4. keep the palms in a rest position on the upper part of the thighs or covering the knees.
5. Catch the right writz with the left palm behind the back.
6. Bend forward from the waist; rest the forehead on the floor in front of the knees. (Exhale)
7. Gently raise the chest and head up breath in
8. Release the hands and keep the palms on the thighs.
9. Unfold the left and right legs and keep it straight.
Benefits of Sasanka asana:
Regular practice of Sasanka asana helps to improve blood circulation to all abdominal organs. It vitalizes pelvis and nerves of the lower back. Relieves seminal weakness. The entire system of the body is relaxed and the sensitivity can be felt throughout. The system becomes tension free and the mind is relaxed.
Sasankasana provides a firm stomach. Improves digestion and suppresses constipation. The muscles of the spine become firmer. Sasankasana relieves neck pain. The upper back, hands and shoulders are fully stretched in this asana. This strengthens the knees and ankles. Refresh the brain Sasankasana can relieve many problems of the spine. This asana is a very good treatment for people with a shoulder drop and a correction of their posture. It is possible to heal the slipped disc when you practice this asana under the guidance of a yoga teacher.
Sasankasana variation

From the lying position with the forehead down and the palms down, you can lift the back and knees so that the knees are upright, the backup and slightly forward, and the forehead touches the ground. , In this position, you must raise your hands until they fit in the upper part of your back. You can hold this position for 15 to 30 seconds and return to the Sasankasana standard. You can do it from a position where you are in your lap.
This variant of Sasankasana helps reduce mental fatigue and refreshes the brain as more blood is pumped to the face and brain. Your back, spine and nervous system become more flexible. This variant helps with problems of sinusitis, tonsillitis and colds. It also improves your digestion.
Caution:
Lumbago and spondylitis patients should avoid.
Some important points:
Mode of bending: Don’t raise the buttocks above the heels.
Mode of breathing: Breathe out whenever you bend downwards and inhale while coming up. Normal breathing in the final position.