Aggression among young people is currently one of the most serious social problems and the scale of aggressive behaviours among middle school and high school students is systematically growing. Despite many years of research on the aggression problem, it has not been possible to create one single definition. The most common is the one according to which aggression is an intentional act, aimed at causing physical or psychological harm to another person; this act can have both a physical and verbal form.

One of the ways to counter or reduce aggression among young people is their involvement in various forms of physical activity – properly organized exercises not only for the body, but also for the mind. Among the features that shape the practice of sport there are: perseverance, self-control, self-discipline and consistency in pursuing a goal. Regular trainings unloads the tension, strengthens self-control mechanisms, and helps to develop skills related to predicting the consequences of their own actions, which means that in the case of adolescents who have difficulties in controlling aggressive behaviours, sport activities can also play a therapeutic role. Of particular importance in solving this problem seem to have martial arts especially the ones for Far East, which due to their attitude towards the body as well as the entire opponent, have a special educational potential in working with people who have tendency towards aggressive behaviour.

In the case of any work with teenagers, the figure of trainer is very important. What counts is not only his knowledge and skills related to planning and running sports activities, but also personality traits and social skills. The last two categories are particularly important when young people who are struggling to control aggression are under their care. In order for the trainer to become teacher of the right moves, techniques or tactics, as well as being the mentor-educator, his abilities to establish relations with the adepts is crucial. A coach who can gain recognition, respect and trust can positively influence the motivation, level of excitation and the faith of young people in their own strength, and at the same time can become a role model for them in terms of norms and values, goals and ways of behaviour – both in the world of sport and also everyday life.

On the other hand knowledge and skills in the meaning of the training process allow the teacher to properly choose the intensity of the exercises to the physical and psychical abilities of future martial arts students. The level of intensity of physical effort is not significant in the context of a possible increase in aggression, however, in the case of activities in which people with tendency towards aggressive behaviours take part, an important stage of any training should be relaxing exercises. They lower the level of organism activeness, also causing a better tolerance to stress situations, and in the long-term training of a given martial art, give rise to mental immunity.

Undoubtedly, practicing martial arts and other sports by young people can bring benefits not only related to improving physical fitness, but also has educational significance. Due to the philosophy, moral principles and discipline that are present in the eastern martial arts, as well as rules that demand respect for the teacher and partner, they give a unique opportunity to positively influence the characters, while in the case of young people who have difficulty in maintaining the commitment to trainings, they can also be beneficial in the means of reduction tendency towards aggressive behaviours.