[Theroretical aspects of the problem of prognosing the state of the human body during space flight].

The paper presents general principles underlying the construction of mathematical systems used to predict the human health status in space flight. It describes methods of prediction based on the concepts of homeostasis and general adaptation syndrome. The paper discusses applications of methods of statistic approximation and expertise estimates to predict changes in different parameters of the Salyut crewmembers. It gives an evaluation of the accuracy with which variations in the heart rate of the Salyut crewmembers were predicted using a linear model and expertise estimates.