ASSESSMENT OF SPEED-STRENGTH ABILITIES OF SKI-RACERS IN THE TRAINING PROCESS

The purpose – perfection of the technology for controlling the speed-strength abilities of ski-racers based on the data received with the Myotest PRO accelerometer (Switzerland).

Research methods and organization. The study involved 124 cross-country skiers at different stages of sport training. Assessment of the speed-strength abilities of lower extremity muscles of skiers was carried out using the Myotest PRO accelerometer (Switzerland).

Research results. The dynamics of changes in the speed-strength abilities of the lower extremity muscles indi- cates a decrease in the speed component of the power of skiers at the beginning of the sport excellence stage. Conclusion. The study revealed the informative character of the jumping tests based on the data received with the "Myotest PRO" accelerometer (Switzerland), which aimed at the exploration of speed-strength abilities of lower extremity muscles of skiers. Differentiated assessment of speed-strength components of the exercise intensity helps to assess strong and weak points of physical fitness of skiers and to adjust the training process.

1. Andersen S., Bjоrndai С., Ronglan L. [The ecology of talent development in the Nordic elite sport model]. Managing Elite Sport Systems: Research and Practice. Routledge, 2015, pp. 49-65.
2. Bakulina O. O., Batalov A. G. [Prediction of sport per- formance in skiing]. Vestnik sportivnoi nauki [Sport Science Bulletin], 2016, no. 3, pp. 56-59. (in Russ.).
3. Feofilaktov V. V., Seluianov V. N., Zimirev N. V. [The study of the relationship of functional abilities of upper and lower extremity muscles with indicators of movement technique of skiers]. Sovremennaia sistema podgotovki v biatlone: materialy VII Vse- rossiiskoi nauchno-prakticheskoi conf. [The modern system of sport training in biathlon: proceedings of the VII All-Russian Conf. o], Omsk, 2011, pp. 243-248. (in Russ.).
4. Golovachev A.I., Kolikhmatov V.I. Shirokova S.V. [Dy- namics of the development  of  physical  qualities of elite female skiers specializing in various types of competitive activity in the annual training cy- cle]. Sovremennaia sistema podgotovki v biatlone: materialy VII Vserossiiskoi nauchno-prakticheskoi conf. [Modern system of sport training in biathlon: proceedings of the VII All-Russian Conf. on science and practice], Omsk, 2019, pp. 12-17. (in Russ.).
5. Houel N., Dinu D., Faury А., Seyfried D. [Accuracy and reliability of the Myotest Pro System to evalu- ate a squat jump]. 5th Asia-Pacific Congress an Sport Technology [Procedia Engineering], 2011, no. 13, pp. 434-438.
6. Kraemer W. J. [Validity of the Myotest Pro in meas- uring force and power production in the squat and bench press]. Strength Cond Res, 2011, no. 25(8), pp 2293–2297.
7. Manunzio C., Mester J., Kaiser W., Wahl P. [Training intensity distribution and changes in performance and physiology of a 2nd place finisher team of the race across America over a 6 month preparation period]. Front. Physiol, 2016, 7:642. DOI: 10.3389/ fphys.2016.00642.
8. Nikonov V.I., Nikonov I.I., Nikonov N.V. [Methods of monitoring special physical fitness of athletes at the sport perfection stage]. International Scientific Journal [Mezhdunarodnyi nauchno-issledovatelskii zhurnal], 2016, no. 1 (43), part 4, pp. 29-35. (in Russ.).
9. Ogandzhanov A.L., Kosikhin V.P., Zhigalov A.V. [In- tegrated control of technical and physical fitness  of jumpers using video analysis and accelerometry]. Izvestiia TulGU. Fizicheskaia kultura. Sport [Bulletin of Tula State University. Physical Education. Sport], 2016, no. 1, pp. 182-189. (in Russ.).
10. Reutskaia E.A. [Age-related development of speed- strength abilities of rotation cuff muscles of young biathletes]. Scientific notes of P.F. Lesgaft Univer- sity [Uchenye zapiski universiteta im. P.F. Lesgafta], 2018, no. 9 (163), pp. 243-246. (in Russ.).
11. Reutskaia E.A. [The influence of morphofunctional development of speed-strength abilities of young biathletes]. Scientific notes of P.F. Lesgaft Univer- sity [Uchenye zapiski universiteta im. P.F. Lesgafta], 2018, no. 10 (164), pp. 276-280. (in Russ.).
12. Sandbakk O., Ettema G., Holmberg H.C. [The influ- ence of incline and speed on work rate, gross ef- ficiency and kinematics of roller ski skating]. Eur J Appl Physiol, 2012, no. 112(8), pp. 2829-2838.
13. Sandbakk O., Holmberg H.C. [Physiological capacity and training routines of elite cross-country skiers: approaching the upper limits of human endur- ance]. Int. J. Sports Physiol. Perform, 2017, no. 12, pp. 1003–1011. DOI: 10.1123/ijspp.2016-0749.
14. Stoggl T., Muller E., Ainegren M., Holmberg H. C. [General strength and kinetics: fundamental to sprinting faster in cross country skiing?]. Scand J Med Sci Sports, 2011, no. 21(6), pp. 791-803.
15. Order of the Ministry of Sport of the Russian Fed- eration dated 20.03.2019 no. 250 ‘On approval of the Federal Standard for sport training in skiing’ (registered in the Ministry of Justice of the  Rus- sian Federation, Reg. no. 54833 dated 04.06.2019) (in Russ.). Prikaz Minsporta Rossii ot 20.03.2019 №250 «Ob utverzhdenii federalnogo standarta spor- tivnoi podgotovki po vidu sporta “lyzhnye gonki” (Zaregistrirovano v Miniuste Rossii 04.06.2019 № 54833).
16. Zagurskii N.S., Sidorova L.Ia. [Testing physical fit- ness of athletes using ‘Myotest PRO’ accelerometer]. Problemy sovershenstvovaniia fizicheskoi kultury, sporta i Olimpizma: materially Vserossiiskoi nauch- no-prakticheskoi conf. [Issues of perfection of phys- ical education, sports and Olympism: proceedings of the All-Russian Conf. on science and practice], Omsk, 2016, pp. 79-87. (in Russ).