The Shavasaha or "Dead" posture is most useful. It is practised on the floor or on a stiff mattress. The arms are stretched, the palms face upward, and the feet are kept apart. Focus attention on the inhalation and exhalation of breath and shut the eyes. Held for ten to twenty minutes, this posture relaxes the entire body and removes fatigue.
-- Notebooks Category 5: The Body > Chapter 5: Exercise > # 83