[Methodologic aspects of combined physiotherapeutic effect]

The paper describes a conceptually logic and mathematical model of the body's responses to the combined exposure to several physiotherapeutical factors. The model has been developed by transforming the basic differential equation of Volterra's survival theory and realizing as a computer program. The model enables one to find the optimal combinations of the parameters of the influencing factors which produce the maximum therapeutical effect without exhausting the compensatory abilities of the body's physiological systems.