Functional human organism changes during physical load is a sequence of complex interrelated processes. The optimum flow of these changes that enables one to adequately adapt oneself to the intensity and specific character of the load performed without causing harmful consequences for the athlete himself is the principal concern of sport medicine doctors and sport scientists and is of special importance in functional diagnostics too. A frequent phenomenon among athletes is overtraining (de–adaption) that can be caused by the absence of proper balance between training load and recovery, as well as by training sessions that are too frequent and too long and by additional tension due to a forthcoming contest or due to other causes. Therefore assessment of functional possibilities of the athlete’s body is important. We consider the human organism an adaptable, complex and dynamic system capable of organizing itself, though there is none, the only one, factor inside the system capable of doing this job. Making use of the automatic ECG analysis system “Kaunas – Load”, with parallel registration of ECG carrying out body motor characteristics (the working capacity developed), ABP or other processes characterizing haemodynamics enable one to reveal and evaluate the synergistic aspects of essential systems of the human organism what particularly extends the possibilities of functional diagnostics. The aim of the study was making use of the model of evaluation of the functional... [to full text]