Dr. Hab., Professor A.G. Levitskiy¹
PhD D.A. Matveev²
PhD, Associate Professor S.P. Mikhaylovskiy³
M.M. Gromov^4
1Lesgaft National State University of Physical Education, Sport and Health, Saint Petersburg
²Saint-Petersburg State University, Saint Petersburg
³Saint-Petersburg Mining University, Saint Petersburg
⁴Baltic State Technical University «VOENMEH» named after D.F. Ustinov, Saint Petersburg

Objective of the study is to identify the characteristics of technical and tactical actions based on the analysis of the trajectories of the centres of gravity of various segments of the athlete's body.
Methods and structure of the study. During a match, an athlete performs movements, including those under the influence of a force field. A fourteen-link model, including the links of the human body, was used to characterise the field. With the help of artificial intelligence, programmes were developed that allow the trajectories of the centres of gravity of the body links to be constructed and the data obtained to be entered into separate files.
Results and conclusions. Based on the shape of the trajectories of the centres of gravity of the body segments, the nature of the force field at various points in space was determined. Based on the analysis of the trajectories, objective insights were obtained into the details of the technical and tactical actions performed by highly skilled athletes, which makes it possible to seek new ways of structuring the training process. The use of the proposed analysis in the training process will improve the effectiveness of students' competitive activities and increase their motivation to continue practising martial arts.

Keywords: judo, biomechanics, centre of gravity, trajectory, force field.

References

1. Volkov A.V., Panchenko I.A., Babchenko A.P. Velichina i napravlennost trenirovochnyh nagruzok – osnovnye faktory upravleniya dinamikoy rabotosposobnosti dzyudoistov [Training load volume and goal as key factors of performance control in judo]. Teoriya i praktika fizicheskoy kultury. 2017. No. 7. Pp. 66-68.
2. Levitskiy A.G., Rudenko G.V., Tkachuk M.G., Kostromin O.V. Individualno-tipologicheskie osobennosti dzyudoistov razlichnyh vesovyh kategoriy [Individual typological features of judokas of various weight categories]. Teoriya i praktika fizicheskoy kultury. 2024. No. 3. Pp. 92-94.
3. Rudenko G.V., Tkachuk M.G., Dorofeev V.A. Morfologicheskie pokazateli uspeshnosti sorevnovatelnoy deyatelnosti v edinoborstvah [Morphological characteristics of competitive success in martial arts]. Teoriya i praktika fizicheskoy kultury. 2020. No. 4. Pp. 92-94.
4. Rudenko G.V., Simakov A.M., Vasilev D.A., Tkachuk M.G. Morfofunktsionalnye kriterii bystroy treniruemosti v thekvando [Morphofunctional criteria for fast training in taekwondo]. Teoriya i praktika fizicheskoy kultury. 2024. No. 4. Pp. 92-94.
5. Sviridov B.A., Meshcheryakov A.V. Analiz kinematicheskih harakteristik dvizheniya manekena pri vypolnenii broskov cherez spinu i cherez bedro kvalifitsirovannymi bortsami-sambistami [Analysis of the kinematic characteristics of a dummy's movement when performing throws over the back and over the hip by skilled wrestlers - sambists]. Scientific notes of P.F. Lesgaft University. 2018. No. 6(160). Pp. 216-220.
6. Sviridov B.A., Popov G.I., Tarhanov I.V. Biomekhanicheskiy analiz struktury broskov cherez tulovishche u kvalifitsirovannyh bortsov-sambistov [Biomechanical analysis of the structure of throws across the torso in skilled sambo wrestlers]. Scientific notes of P.F. Lesgaft University. 2019. No. 5(171). Pp. 277-281
7. Tkachuk M.G., Levitsiy A.G., Rudenko G.V., Simakov A.M. Osobennosti fizicheskogo razvitiya sportsmenov-edinobortsev [Features of physical development of martial artsmen]. Teoriya i praktika fizicheskoy kultury. 2025. No. 3. Pp. 9-11.
8. URL: https://m.vk.com/video-221004124_456246020?from=search (date of access: 03.09.2025)