There was investigated the influence of the moderate and intensive physical load on the functional possibilities of some functional systems of organism. Obtained data show that as a result the uses of the moderate physical exercises complex in combination with bicycle aerometry the functional possibilities of muscular, respiratory and cardiovascular systems rise, about which the recorded physiological indices testify. Combined effect of both regimes (aerobic- anaerobic) depends on the maintenance of the active mode of all implied in the work groups of muscles. The content of free amino acids in the saliva reflects the deviations of nitrous metabolism in response to the actions of the physical load of different intensity, and concentration of glutamic acid, glutamine, amino acids with the branched circuit and urea can serve as the criterion of the influence of the testing physical loads. Coefficient glutamic acid/glutamine can be used as the control test of the intensity of the influence of physical loads.