One of the urgent problems in modern sports is the study of emotional states in athletes. This is due to the changing socio-economic conditions that affected sports activities. An increase in loads, high competition lead to a high level of stress and an increase in emotional stress. Emotions show the state of the athlete and his attitude to a particular sports situation. The article reveals the theoretical and practical aspects of the problem of emotional states of athletes. Emotional states are a set of psychophysiological phenomena, where, in addition to motor reactions, various changes appear in the course of processes and are associated with different manifestations of emotions. They are distinguished by individuality, polarity, variability, integrity. Criteria for emotional states are presented. The purpose of the research is to reveal the severity of manifestations of emotional states of athletes in the conditions of the training process. The study sample consisted of 1545 athletes aged 14-18 years, of which the share of boys was 68.5%, girls - 31.5%. It was carried out on the basis of GAUZ SO "Multidisciplinary Clinical Medical Center" Bonum ". Within the framework of the study, attention was paid to such indicators as: well-being, activity, mood, neuropsychic stability, interest, emotional tone, comfort. The conducted research allows us to make a conclusion. In general, athletes are dominated by mental well-being, positive emotional states, a desire to practice playing skills with enthusiasm and attention, with the manifestation of a cognitive need, good health, mood, sustained interest and concentration in the implementation of a sports game, full inclusion in the training process.