Vajrasana adamantine pose, diamond pose, kneeling pose, pelvic pose, and thunderbolt pose is an asana

Asana

Asana is a body position, typically associated with the practice of Yoga, originally identified as a mastery of sitting still, with the spine as a conduit of biodynamic union...

.

Etymology

The name comes from the Sanskrit words vajra meaning "thunderbolt" or "diamond", and asana (आसन, āsana) meaning "posture" or "seat".

Description

The practitioner sits on the heels with the calves beneath the thighs. There is a four finger gap between the knee-caps, and the first toe of both the feet touch each other.

Contraindications and cautions

Vajrasana may be harmful to knees, some orthopaedic surgeons claim.