Dynamics of movement of athletes' centers of gravity in the process of preparing over the head throws Hikikomi-gaeshi

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Dr. Hab., Professor A.G. Levitsky1
PhD D.A. Matveev2
O.V. Kholodkova2
A.Zh. Berekenov3
1Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg
2Saint Petersburg State University, St. Petersburg
3Admiral Makarov State University of Maritime and Inland Shipping, St. Petersburg

Objective of the study was to identify the features of changes in the projections of speeds and accelerations of the athletes’ centers of gravity in the process of preparing Hikikomi-gaeshi in the conditions of a competitive fight.
Methods and structure of the study. To conduct the experiment, a video recording was taken from the YouTube video hosting site. Part of the video recording, in which a throw was carried out in a competitive fight, was divided into cyclograms. Using the PaintBrash program, the centers of gravity of the feet, legs, hips, forearms, shoulders, torso and head of each athlete were placed on each cyclogram, and then the coordinates of the center of gravity were calculated. Using the Ecxel program, the lengths of the projections of the movements of the centers of gravity of the attacking and attacked athletes on the coordinate axes were calculated, and then the projections of the velocities and accelerations of the centers of gravity.
Results and conclusions. The authors found that in the studied version of the preparation of the Hikikomi-gaeshi throw, features of the biomechanical characteristics of Tori’s movements during the attack were identified. The dynamics of the movement of the center of gravity immediately before the throw among athletes are of the same nature, since the direction of changes in the projections of their speeds and accelerations coincide. It is concluded that it is advisable to include exercises with variable spatio-temporal characteristics of the movement of the center of gravity into the training process.

Keywords: judo, biomechanics, technical and tactical actions.

References

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  2. Levitsky A.G., Matveev D.A., Potsipun A.A., Kraev S.A. Analiz trayektorii tsentra mass atakuyushchego sportsmena pri demonstratsii broska podsechkoy v koleno [Analysis of the trajectory of the center of mass of an attacking athlete when demonstrating a throw to the knee]. Teoriya i praktika fizicheskoy kultury. 2021. No. 4. pp. 97-98.
  3. Levitsky A.G., Matveev D.A., Potsipun A.A., Yashkin V.A. Pogreshnost metodiki postroyeniya trayektorii tsentra mass sportsmena [Error in the methodology for constructing the trajectory of the athlete’s center of mass]. Integratsiya yestestvenno-nauchnogo i sotsialno-gumanitarnogo znaniya v sfere fizicheskoy kultury i sporta [Integration of natural-scientific and social-humanitarian knowledge in the field of physical culture and sports]. Proceedings scientific symposium dedicated to the 95th anniversary of the journal “TiPFK”, Moscow, December 4, 2020. Moscow: GTSOLIFK publ., 2020. pp. 55-59.
  4. Available at: https://www.youtube.com/watch?v=CrRGfeKQQ4k (date of access: 18.12.2023).