Pattern Recognition: Parameters of Body Inrun Position at the Beginning of Take-Off

Keywords: ski jumping, take-off, technique, kinematics, parameters

Abstract

The purpose of the paper is to determine the differences in the technique of body inrun position at the beginning of take-off in junior ski jumpers of different qualifications (athletic preparedness).

Materials and methods. The study participants were 22 junior ski jumpers aged 14-15 (a group of junior ski jumpers) during the Ukrainian Ski Jumping Championship (October 9, 2010, Vorokhta, Ukraine) and 33 ski jumpers aged 16-17 (a group of senior ski jumpers) who took part in the international competitions “Lotos Cup” in January 2010. The study analyzed the videos of take-offs of 22 athletes aged 14-15 and 33 athletes aged 16-17. The parameters of ski jumping technique and sports results were processed on the basis of video materials of the first competition series.

Results. There are significant differences (p < 0.001) in the mean values of corresponding parameters of the body position at the beginning of take-off. The data point to a tighter tuck of the body of the athletes aged 16-17. The structure coefficients of the first canonical discriminant function indicate that the function is most significantly related to the values of angles 10 (ν); 8 (ζ); 6 (θ): the inclination angle of the segment of the straight line passing through the axes of the hip and ankle joints (ν) towards the direction of the skier’s movement; the inclination angle of the segment of the straight line passing through the general center of body weight and the axis of the ankle joint (ζ) towards the direction of the skier’s movement; the inclination angle of the head towards the trunk (θ). The athletes aged 16-17 differ from the athletes aged 14-15 by the parameters characterizing the body’s tuck in the starting position – the position at the beginning of take-off.

Conclusions. The unstandardized canonical discriminant function coefficients can be used to classify the levels of proficiency in the body’s tuck in the starting position – the position at the beginning of take-off in athletes aged 14-17.

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Author Biographies

A. V. Kazmiruk, Lviv State University of Physical Culture

Department of Winter Sports
Kostiushka St, 11, Lviv, 79007, Ukraine
andriy.kazmiruk84@gmail.com

V. I. Banakh, Taras Shevchenko Regional Humanitarian Pedagogical Academy in Kremenets

Department of Medical and Biological Basis of Physical Education,
Litseina St, 1, Kremenets, Ternopilska oblast, 47003, Ukraine

A. P. Vlasov, Lviv State University of Physical Culture

Department of Informatics and Kinesiology,
Kostyushka St, 11, Lviv, 79000, Ukraine
anvitvl@ukr.net

A. O. Lopatiev, Lviv State University of Physical Culture

Research Institute,
Kostiushka St, 11, Lviv, 79007, Ukraine

O. F. Tovstonoh, Lviv State University of Physical Culture

Department of Athletic Sports,
Kostiushka St, 11, Lviv, 79007, Ukraine

N. I. Stefanyshyn, Lviv State University of Physical Culture

Department of Water and Non‑Olympic Sports,
Kostiushka St, 11, Lviv, 79007, Ukraine

O. M. Khudolii, H. S. Skovoroda Kharkiv National Pedagogical University

Department of Theory and Methods of Physical Education, Recreation and Rehabilitation Physical Training,
Alchevskykh St, 29, Kharkiv, 61003, Ukraine
khudolii.oleg@gmail.com

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Published
2018-12-25
Cited
0 article
How to Cite
Kazmiruk, A., Banakh, V., Vlasov, A., Lopatiev, A., Tovstonoh, O., Stefanyshyn, N., & Khudolii, O. (2018). Pattern Recognition: Parameters of Body Inrun Position at the Beginning of Take-Off. Teorìâ Ta Metodika Fìzičnogo Vihovannâ, 18(4), 214-220. https://doi.org/10.17309/tmfv.2018.4.08
Section
Fundamentals of Physical Exercise Technique