[Effectiveness of training animals to adapt to hypoxia during sleep]

In sleeping animals (sleep induced by the drugs aminasine and elenium) step-by-step training for 13 days (6 hours daily) in an altitude chamber produces a number of adaptive changes--hemopoiesis stimulation, slower weight gain, increased adrenal weight and, this being most important, elevated altitude tolerance. It is concluded that the state of drug-induced sleep can be well used to train for altitude hypoxia.