A very powerful pose at the beginning of the asana practice, which helps entire digestive system and makes asana practice more easy.
Benefits:

Stretches the neck and back.
The abdominal muscles are tensed and the internal organs are compressed which increases the blood circulation and stimulates the nerves, increasing the efficiency of the internal organs.
The pressure on the abdomen releases any trapped gases in the large intestine.
Blood circulation is increased to all the internal organs.
Digestive system is improved.
Relieves constipation.
Strengthens the lower back muscles and loosens the spinal vertebrae.
Sterility and impotence.

Benefits for Women:

Massages the pelvic muscles and reproductive organs and is beneficial for menstrual disorders.
Reduces fats in the abdominal area, thighs and buttocks.