Halasana is known as plough pose. It is very good for back. People suffering from back pain must do this asana. It makes the backbone strong and flexible. This asana also strengthen the muscles of neck. 
Procedure of halasana (Plough pose)
Step 1: Lie straight on the ground. Keep the palms along the body and put them straight on the ground.
Step 2:
Slowly lift the lower part of body i.e. feet in a rhythm and touch the ground behind the head with the toes. Stay in this position for 10-15 seconds and then slowly come back to initial position.
Video of halasana (Plough pose)
Benefits of halasana (Plough pose)
- Helpful in strengthening the neck muscles.
- Helpful in reducing weight and back pain.
- Strengthens the backbone.
- Improves the blood circulation.