PhD A.B. Rafalovich^{1, 2
1}The Fеdеrаl Trаining Sроrts Center of the representative teams of Russia, Moscow
²Moscow State Academy of Physical Education, Malakhovka, Moscow Region

Objective of the study was to identification of informative indicators of the technique of the barbell jerk from the chest.
Methods and structure of the study. A comparative analysis of the barbell jerk technique of 31 highly qualified weightlifters was conducted. In successful and unsuccessful approaches, the spatial-temporal characteristics of the barbell movement and the indicators assessing the position of the athlete and the barbell at certain moments of the exercise were compared. High-speed video recording (250 fps) with one camera was used to record the movement.
Results and conclusions. The informative indicators of the technique of the barbell jerk from the chest were revealed, which had reliably significant differences (p≤0,05) in successful and unsuccessful approaches: the duration of the final acceleration phase, the duration of the microphase of switching after the final acceleration and the unsupported phase, the vertical movement of the barbell in the phases of the half-squat, final acceleration, first support squat and unsupported phase, the distance between the feet in the squat (in the «scissors»).

Keywords: jerk, technique analysis, successful and unsuccessful approaches, highly skilled weightlifters.

References

1. Medvedev A.S., Masalgin N.A., Errera A.G., Frolov V.I. O vzaimosvyazi parametrov tolchka shtangi ot grudi [On the relationship between the parameters of the barbell jerk from the chest]. Teoriya i praktika fizicheskoy kultury. 1981. No. 6. pp. 6-7.
2. Rafalovich A.B., Khasin L.A. Analiz prostranstvenno-vremennykh kharakteristik tolchka shtangi ot grudi tyazheloatletov vysokoy kvalifikatsii [Analysis of spatio-temporal characteristics of the barbell jerk from the chest of highly qualified weightlifters]. Uchenyye zapiski universiteta im. P.F. Lesgafta. 2020. No. 7 (185). pp. 325-332.
3. Khasin L.A., Rafalovich A.B. Mikrostruktura tekhniki vypolneniya tolchka shtangi tyazheloatletami vysokoy kvalifikatsii [Microstructure of the technique of performing the barbell jerk by highly qualified weightlifters]. Uchenyye zapiski universiteta im. P.F. Lesgafta. 2018. No. 11 (165). pp. 382-386.
4. Khasin L.A., Rafalovich A.B. Analiz i formirovaniye rekomendatsiy po sovershenstvovaniyu tekhniki vypolneniya ryvka shtangi tyazheloatletov vysokoy kvalifikatsii [Analysis and formation of recommendations for improving the technique of performing the barbell snatch of highly qualified weightlifters]. Uchenyye zapiski universiteta im. P.F. Lesgafta. 2021. No. 9 (199). pp. 318-323.
5. Khasin L.A., Rafalovich A.B. Metodika sravneniya sil vzaimodeystviya sportsmena so shtangoy pri vypolnenii tolchka ot grudi po rezultatam skorostnoy syemki odnoy videokameroy [Methodology for Comparing the Forces of Interaction between an Athlete and a Barbell When Performing a Jerk from the Chest Based on the Results of High-Speed ​​Filming with One Video Camera]. Podgotovka vysokokvalifitsirovannykh sportsmenov-tyazheloatletov na sovremennom etape [Training of Highly Qualified Weightlifters at the Current Stage]. Proceedings of the II All-Russian scientific-practical conference with international participation. Malakhovka. 2022. pp. 142-149.
6. Oleshko V. G. Dynamics of Biomechanical Structure of Highly Qualified Weightlifter’s Clean and Jerk, Depending on Sex and Weight Category. European Researcher. 2013. Vol. (58). No. 9-1. pp. 2227-2240.