[Problem of desynchronosis during space flight].

Major problems of biorhythm are discussed. Among the numerous and diverse rhythms inherent in the human body (which is the subject matter of the present paper) circadian (essentially 24-hour) variations play the leading role. This kind of rhythm is of universal and mandatory character which makes it possible to categorize it as a law. The system of circadian rhythms incorporates elements of both synchronization and desynchronization. In the welfare state synchronization elements are prevailing while in space flight the specific weight of desynchronization increases due to the permanent desynchronization factor--weightlessness. Due to this, crewmembers are to adhere strictly to the work-sleep regimen.