Vajrasana is very easy to do yoga asana. It is a simple sitting pose with folding the knees. The practitioner sits on the heels with the calves beneath the thighs. It is very benefitial for back and chest. It also improves memory of a person. This asana is very helpful for people with weak digestion. It makes the digestive system strong. 
Procedure of Vajrasana (Thunderbolt Pose)
Step 1: Sit on your knees. Keep the head and waist exactly straight.
Step 2:
Keep your hands on the knees in such a way that the palms should face downward.
Note:
- In this asana the heels should be exactly below the legs and waist should be exactly straight.
- The chest and neck should also be erect.
Video of Vajrasana (Thunderbolt Pose)
Benefits of Vajrasana (Thunderbolt Pose)
- Improves memory.
- Cures backache and chest diseases.
- Helpful in concentration.
- Strengthens the thighs knees and toes.
- Improves the digestive system.
- Makes the body strong.