Objective of the study was to analyze benefits of the EEG theta rhythm tests for competitive performance rating purposes in some sports disciplines, with the EEG theta-activity rates applicable as the competitive progress biomarkers. Results and conclusion. Subject to the study was a correlation of the EEG theta rhythm amplitude with the individual attention control; plus a clear correlation between the frontal-medial theta rhythm amplitude and competitive progress found by a few studies. Some studies found the theta rhythm amplitudes for the sports professionals and beginners showing expressed differences that may be interpreted as indicative of the skills levels, with the theta rhythm rates applicable for the skill set rating purposes. Of special interest were analyses of the theta rhythm amplitude fluctuation profiles as biomarkers of the skill difficulty levels and state anxiety in sports. Subject to the studies were also transcranial magnetic stimulation (with the theta packing protocols) methods used to correct the psycho-emotional control, optimize attention and motor memorizing mechanisms for a faster progress in the athletic skills mastering and excellence process. Of special importance in this context was the finding that transcranial magnetic stimulation of motor cortex improves the anaerobic performance. It should be emphasized, however, that the fast progress of the transcranial magnetic stimulation methods is associated with some risks as steps up the pre-competitive mental and physical fitness and, hence, may be interpreted as a sort of "neural doping". The study data and analyses give the grounds to conclude that the theta-rhythm-harmonized frequencies may be beneficial for precompetitive mental conditioning, with the EEG theta rhythm amplitude applicable as promising biomarkers for the training system improvements and competitive progress.