The purpose of the study was to find out the effectiveness of using computer tests simulators, in particular the "MY_TIMER" program, to assess the functional state of students before and after training and to choose the optimal load in the training process. Materials and methods. The methods which were used in the study were theoretical analysis and generalization of scientific theoretical literature, computer test simulators, the "MY_TIMER" program, which was designed to assess a person's condition based on the analysis of his/her subjective perception of different periods of time. Standard test procedure: 1) Install time interval of 10 seconds on the scale. 2) Instructions to the subject: "After the start of the stopwatch, press the left mouse button 12 times every 10 seconds". 3) The subject, looking at the stopwatch, fixes 12 times by pressing buttons for a time interval of 10 seconds (we get objective indicators). 4) Then close the eyes and perform the same task without visual control (we get subjective indicators). 5) Comparison of results shows a subjective shift of subjective assessment of a time interval of 10 seconds. 14 participators of the experiment are 12-14-year-old students of Slavutych secondary school, who regularly attend swimming training in the pool. Statistical processing of data was carried out using Microsoft Excel. Results and discussion. Analysis of the obtained results before objective and subjective training of perception of different periods of time showed an increased level of mental activity, that is, the state of excitement of young athletes, their optimal readiness for surgery activity. After the training, there are only qualitatively unreliable changes in the results of schoolchildren. Negative average result (subjective shift of subjective assessment) is an indicator that it will be possible to increase the load of swimmers on the next training. Out of 14 subjects, only one had a positive subjective test result (just over one second). Increasing the subjective assessment of the interval time longer than 3 seconds is usually accompanied by a decrease in the level of mental activity due to fatigue, decreased concentration of attention, drowsiness – that is, it characterizes a state of apathy, emotional "burnout". Therefore, for this student, physical and emotional load was quite significant. In other students, in whom psychophysiological indicators were determined, unspent resources after training were remained. Conclusion. Use of computer test simulators, in particular the program "MY_TIMER" is relevant and promising, it gives an opportunity to determine readiness of schoolchildren to perform physical exercise and psychophysiological control states of young athletes after training. The obtained negative average result (subjective shift of subjective assessment) after training by young swimmers is an indicator for increasing the physical load in the next training session. Computer test simulators with other programs for determination psychophysiological indicators must be used for correcting construction training and determining the individual workload for every athlete

Keywords: computer test simulators, "MY_TIMER" program, psychophysiological state, students

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