The purpose of the study is to determine the influence of the nature of training load on the mobility of nerve processes in young athletes engaged in swimming and scuba diving, which will allow for an indirect assessment of the functionality of the cerebral cortex in ensuring the psychophysiological status of the athlete. Research methods and organization. The empirical research methods included: a correction test based on the tables of V.Ya. Anfimov in the modification by O.N. Moskvichenko, content analysis of the comparative characteristics of the correction test indicators for swimmers and scuba divers, and correlation analysis. The modification provides for the assessment of uniformity and quality of minute-by-minute work, in addition to considering the coefficients of performance and productivity, which allows for the examination of the mobility of nerve processes as a factor that contributes to obtaining data on the psychophysiological status of the athlete. Research results. The comparison of the results of minute-by-minute work allows the methodology to be used as a control for regulating the mental function of the body during periods of intense training and competitive loads by managing the volume and intensity of individual training loads. Conclusion. The application of a modified correction test among young athletes specializing in cyclic sports in aquatic environments has allowed for the establishment that the indicators of the correction test methodology depend on the nature of the training load, the type of sport, and the level of athletic skill. The obtained data clarify and expand scientific understanding of the mobility of nervous processes and their dependence on the specifics of the sport, individual characteristics of the nervous system, and the degree of its mobilization for specific motor activities.