Anaerobic threshold and its representation in systemic categories of human sports activity

Objective: system analysis of human sports activity and anaerobic threshold definition in the system activity categories. Materials and methods: 10 male volunteers participated in the study; they were offered a step-by-step graduated exercise on the veloergometer up to failure. The power of the first stage was 60 W, and the power of the subsequent stages was sequentially increased by 20 W until the subject failed. The duration of exercise was 2 min at each stage, and the pedaling speedwas constant. Before the examination an experimenter gave a verbal instruction to the subject, assessed his level of motivation. Subject’s heart rate, breathing rate, blood pressure and pedaling speed was recorded at the each stage. The vegetative index of Kerdo, stroke volume and cardiac minute volume was estimated by calculation. The concept of systemic quantization of behavior by K.V. Sudakov was used for a system analysis of sports activity. Results: the energy metabolism changed from aerobic to anaerobic at the stage of 160 W defined as threshold power. This power was the most optimal power when result could be achieved, because expected interim result was achieved in presence of maximum «physiological price». Minimizing of the index of regulator efficiency at this stage confirmed that fact. We believe that the basis is the optimization of systemic organization of functions. Conclusions: a sign of the anaerobic threshold is the achievement of a result of sport activity in presence of high «physiological price».