Savasana (Sanskrit: शवआसन, śavāsana, "Corpse Pose", alternately spelled Shavasana or Sarvasana, and also known as mrta-asana) is a yoga asana often used to begin and conclude a yoga session. It is a relaxing posture intended to rejuvenate one's body, mind and spirit. While savasana is a good way to reduce stress and tension, it is not recommended for meditation as it has a tendency to induce sleepiness. If afflicted by drowsiness or restlessness of the mind while performing savasana, increase the rate and depth of breathing.
From Wikipedia:
Savasana (Sanskrit: शवआसन, śavāsana, "Corpse Pose", alternately spelled Shavasana or Sarvasana, and also known as mrta-asana) is a yoga asana often used to begin and conclude a yoga session. It is a relaxing posture intended to rejuvenate one's body, mind and spirit. While savasana is a good way to reduce stress and tension, it is not recommended for meditation as it has a tendency to induce sleepiness. If afflicted by drowsiness or restlessness of the mind while performing savasana, increase the rate and depth of breathing.