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

Authors

DOI:

https://doi.org/10.17309/tmfv.2018.4.08

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

References

Arndt, A., Bruggemann, G., Virmavirta, M., & Komi, P. (1995). Techniques used by olympic ski jumpers in the transition from takeoff to early flight. Journal of Applied Biomechanics, 11(2), 224–237.
https://doi.org/10.1123/jab.11.2.224

Maryniak, J., Tomczak, A., Dziubinski, A., & Machu, M. (2002). Aerodynamic tests of a ski jumper model. Dynamiki Obiektow Ruchomych, (2), 256-268 (in Polish).

Kazmiruk, A., Stefanyshyn, O., Berezhanskyi, V., Zinkiv, O., & Banakh, V., (2016). Program of personality structure priority component development in Nordic Combined. Journal of physical education and sport, 16(2), 374 - 379.

Marqes-Bruna, P., & Grimshaw, P. (2009). Mechanics of flight in ski jumping: aerodynamic stability in roll and yaw. Sports Technol., 2(3/4), 111-120.

Puumala R. (1995). A kinematic analysis of the flight phase of ski jumping. International Symposium on Biomechanics in Sports, (13), 256-260.

Hoshino, H., Koike, T., Sasaki, T., & Tsunda, K. (2001). Wplyw predkosci skochka v fazie lotu na dlugoshch skoku. Sport Wychynowy, 11/12, 443-444.

Zanevskyy, I., & Banakh, V. (2010). Dependence of ski jump length on the skier’s body pose at the beginning of take-off. Acta of Bioengineering and Biomechanics, 12(4), 77-85.

Chardonnens, J., Favre, J., Cuendet, F., Gremion, G., & Aminian, K. (2013). A system to measure the kinematics during the entire ski jump sequence using inertial sensors. Journal of Biomechanics, 46(1), 56–62. https://doi.org/10.1016/j.jbiomech.2012.10.005

Goyal, M. K., & Ojha, C. S. P. (2011). Estimation of Scour Downstream of a Ski-Jump Bucket Using Support Vector and M5 Model Tree. Water Resources Management, 25(9), 2177–2195. https://doi.org/10.1007/s11269-011-9801-6

Haghiabi, A. H. (2017). Estimation of scour downstream of a ski-jump bucket using the multivariate adaptive regression splines. Scientia Iranica, 24(4), 1789–1801. https://doi.org/10.24200/sci.2017.4270

Janura, M., Cabell, L., Elfmark, M., & Vaverka, F. (2010). Kinematic Characteristics of the Ski Jump Inrun: A 10-Year Longitudinal Study. Journal of Applied Biomechanics, 26(2), 196–204. https://doi.org/10.1123/jab.26.2.196

Vodicar, J., Coh, M., & Jost, B. (2012). Kinematic Structure at the Early Flight Position in Ski Jumping. Journal of Human Kinetics, 35, 35–45. https://doi.org/10.2478/v10078-012-0077-6

Published

2018-12-25

How to Cite

Kazmiruk, A. V., Banakh, V. I., Vlasov, A. P., Lopatiev, A. O., Tovstonoh, O. F., Stefanyshyn, N. I., & Khudolii, O. M. (2018). Pattern Recognition: Parameters of Body Inrun Position at the Beginning of Take-Off. Physical Education Theory and Methodology, 18(4), 214–220. https://doi.org/10.17309/tmfv.2018.4.08

Issue

Section

Fundamentals of Physical Exercise Technique

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