Russian Federation
Russian Federation
Russian Federation
Russian Federation
The relevance of the study of the influence of muscle asymmetries on the competitive activity of biathletes is determined by the fact that within the framework of overcoming the training and competitive distance, there is a constant alternation of a symmetrical simultaneous one-step move with an asymmetric simultaneous two-step move and repeated reproduction of an asymmetric working posture when firing a shot, and an unambiguous answer about the direction and strength of influence there is no such asymmetry for sports and technical results. The purpose of the study - assessment of the influence of sagittal asymmetry of the power abilities of the flexors and extensors of the knee joints in a single-joint unilateral exercise on the motor performance of multi-joint cyclic and acyclic locomotions, as well as on the level of competitive skill of high-class biathletes. Methodology and organization of the study. The study was conducted on 36 male members of the Russian national biathlon team (age 25±3.7 years) for 6 years (2016-2022). The method of isokinetic dynamometry was used to assess the power abilities of the muscles of the flexors and extensors of the knee joint of the right and left limbs (data obtained on the Biodex System 4 Pro robotic complex were used). The method of control tests (jump up from a place and running on a treadmill) was used to assess the effect of lower limb asymmetry on the competitive exercise of highly qualified biathletes. The results of the study. The influence of indicators of sagittal asymmetry on the elements of competitive exercises of biathletes is different and depends on the stage of sports training. There were no statistically significant differences between biathletes with different levels of world ranking and the presence of sagittal asymmetry in them. Conclusions. At the stage of early starts, frontal and sagittal asymmetry in terms of explosive strength and the zone of maximum strength angles has a significant impact on the distance speed of biathletes, therefore, the use of knee-dominant strength multi-joint unilateral exercises is more preferable in them, compared to isolated exercises performed on simulators. At the stage of direct preparation for the main start, it is advisable to use knee-dominant unilateral strength exercises in the maximum strength mode with modeling of competitive angles of knee joint extension
high-class biathletes, asymmetry, knee flexors and extensors, sagittal plane, biodex systems 4 pro
1. Kryuchkov, A.S., Rostovtsev, V.L., Myakinchenko, P.E., Myakinchenko, E.B. and Fendel, T.V. (2023), “Influence of interlimb functional asymmetry of leg muscles on the motor performance of cyclic and acyclic locomotion in highly qualified biathletes”, Uchenye zapiski universiteta im. P.F. Lesgafta, No. 7 (221), pp. 203–211.
2. Trishin, A.S., Trishin, E.S., Kudryashova, Yu.A., Berdichevskaya, E.M. and Kudryashov, E.A. (2020), “Individual profile of asymmetry as a factor of motor stereotype of qualified athletes”, Physical culture, sport – science and practice, No. 3, pp. 30–34.
3. Kabanov, Yu.N. (2009), “The success of sports activities and functional asymmetry of the brain”, World of Science, Culture, Education, No. 3 (15), pp. 194–201.
4. Koryukin, D.A., Kosolapov, O.N. and Sidorov, R.V. (2022), “Functional asymmetry in athletes of different qualifications and persons not involved in sports”, Uchenye zapiski universiteta im. P.F. Lesgafta, No. 12 (214), pp. 293–297.
5. Burmistrov, A.D., Chikurov, A.I., Khudik, S.S. and Radaeva, S.V. (2018), “Functional asymmetry of highly qualified skaters”, Tomsk State University Bulletin, No. 434, pp. 143–148.
6. Yurov, I.A. and Melnikov, V.M. (2018), “Functional asymmetry as a predictor of sports performance”, Resources of competitiveness of athletes: theory and practice of implementation, No. 1, pp. 263–265.
7. Fox, K.T., Pearson, L.T. and Hicks, K. (2023), “The effect of lower inter-limb asymmetries on athletic performance: A systematic review and meta-analysis”, Plos one, Vol. 18, No. 6, available at: https://journals.plos.org/plosone/article?idhttps://doi.org/10.1371/journal.pone.0286942/ (accessed 1 August 2023).
8. Maloney, S.J. (2019), “The relationship between asymmetry and athletic performance: A critical review”, The Journal of Strength & Conditioning Research, Vol. 33, No. 9, pp. 2579–2593.
