Dr. Hab., Professor R.N. Terekhina¹
Dr. Hab., Professor E.N. Medvedeva¹
PhD, Professor E.S. Kryuchek^1
1Lesgaft National State University of Physical Education, Sport and Health, St. Petersburg

Objective of the study was to analyze the objective elementary gymnastic biomechanics by difficulty classes to facilitate technical progress and expert valuations.
Methods and structure of the study. We used, for the purposes of the study, analysis of the reference literature and the valid regulatory provisions; training process observations and analysis, questionnaire surveys, expert valuations, technical tests, contactless movement sequencing video-analyses, skin electromyography tests, stabilographic (equilibrium) tests, and training model testing experiment. The study was designed to analyze competitive elements in the modern elite (individual and group) rhythmic/ artistic/ trampoline gymnastics and acrobatic rock-n-roll.
Results and conclusion. Based on the study data and analyses, we offer theoretical provisions for a new elements valuation matrix to improve the valid FIG Code of Points; facilitate the specific elements training/ excellence systems and training system design and management; and facilitate the expert valuations of every execution aspect. The analysis and recommendations may be beneficial for progress in every gymnastic discipline.

Keywords: rhythmic gymnastics, rules of competitions, Code of Points, skills, routines, difficulty score, expert valuation, progress algorithms, technical execution scores.

References

1. Medvedeva E.N., Davydova T.Yu., Kolesnikova T.I. Osobennosti aktivatsii myshts pri vypolnenii perebrosok predmetov iz razlichnykh ishodnykh polozheniy v khudozhestvennoy gimnastike [Throw elements in rhythmic gymnastics: muscle activation profiling tests]. Teoriya i praktika fiz. kultury. 2019. No. 8. pp. 90-92.
2. Medvedeva E.N., Stepanova I.A., Ogurtsova U.M., Pukhov A.M. Biomekhanicheskie faktory kak osnova proektirovaniya protsessa osvoeniya ravnovesiy s naklonami i povorotami tulovishcha v esteticheskoy gimnastike [Biomechanical factors as basis for design of process of mastering balance with body bends and turns in aesthetic gymnastics]. Uchenye zapiski universiteta im. P.F. Lesgafta. 2018. No. 2 (156). pp. 135-138.
3. Medvedeva E.N., Kotelnikova E.B. Proektirovanie tekhnicheskoy podgotovki na osnove ucheta ob'ektivnykh faktorov kachestva vypolneniya pryzhkov khudozhestvennoy gimnastiki [Design of technical training based on objective factors of jumps performance rhythmic gymnastics]. Uchenye zapiski universiteta im. P.F. Lesgafta. 2019. No. 7 (173). pp. 121-125.
4. Medvedeva E.N., Ilyina N.P., Larionova M.N. Biomekhanicheskie kharakteristiki slozhnosti poocherednoy «volny» rukami v khudozhestvennoy gimnastike [Biomechanical characteristics of alternating arm wave move in rhythmic gymnastics]. Teoriya i praktika fiz. kultury. 2021. No. 4. pp. 88-90.
5. Skrzhinskiy A.M., Kryuchek E.S., Medvedeva E.N. Ob'ektivnye biomekhanicheskie kharakteristiki kachestv v pryzhkakh na batute kak osnova zdorovya i uspeshnosti sorevnovatelnoy deyatelnosti studentov [Objective biomechanical characteristics of qualities in trampoline jumping as basis of health and success in students’ competitive activity]. Universitetskiy sport: zdorovye i protsvetanie natsii [University sport: national health and prosperity]. Proceedings IX International Scientific Conference of Students and Young Scientists. October 10-13, 2019 / Kazakh Academy of Sports and Tourism. Almaty: «Kazak universiteti», 2019. pp. 97-100.
6. Terekhin V.S., Medvedeva E.N. Obosnovanie modeli osnovnogo khoda akrobaticheskogo rok-n-rolla na osnove analiza elektricheskoy aktivnosti myshts sportsmena [Substantiation of model of main moves in acrobatic rock’n’roll based on analysis of electrical activity of athlete's muscles]. Uchenye zapiski universiteta im. P.F. Lesgafta. 2016. no. 3 (133). pp. 162-166.
7. Terekhina R.N., Kryuchek E.S., Medvedeva E.N. et al. Evolyutsiya soderzhaniya sorevnovatelnykh programm v khudozhestvennoy gimnastike [Evolution of content of competitive programs in rhythmic gymnastics]. Uchenye zapiski universiteta im. P.F. Lesgafta. 2018. No.1 (155). pp. 253-257.
8. Terekhina R.N., Medvedeva E.N., Suprun A.A. et al. Obosnovanie podkhoda k opredeleniyu slozhnosti elementov khudozhestvennoy gimnastiki i ikh tekhnicheskoy tsennosti [Justification of approach to determining complexity of elements in rhythmic gymnastics and their technical value]. Uchenye zapiski universiteta im. P.F. Lesgafta, 2015, 3 (121), pp. 146-149.
9. Terekhina R.N., Medvedeva E.N., Kryuchek E.S. Biomekhanicheskie faktory sovershenstvovaniya sinkhronnosti vypolneniya elementov gruppovykh uprazhneniy khudozhestvennoy gimnastiki [Biomechanical Factors of Improving Synchronicity of Performing Group Exercise Elements in Rhythmic Gymnastics]. Sport, chelovek, zdorove [Sports, people, health]. Congress proceedings, prof. V.A. Tajmazov [ed.]. St. Petersburg, 2017. pp. 464 -466.
10. Terekhina R.N., Viner-Usmanova I.A., Medvedeva E.N. et al. Ob'ektivizatsiya tekhnicheskoy tsennosti elementov khudozhestvennoy gimnastiki kak faktor uspeshnosti mnogoletney podgotovki sportsmenok [Objectivity promotion in technical quality scoring in rhythmic gymnastics for success of long-term training process]. Teoriya i praktika fizicheskoy kultury. 2016. No. 10. pp. 66-67.