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What governs successful performance of a complex whole body movement: The Kovacs release-regrasp on horizontal bar?

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posted on 26.01.2017 by Michael Hiley, Fred Yeadon
The Kovacs is a release and regrasp skill performed on the horizontal bar in men׳s artistic gymnastics. It is a popular skill in elite competitive gymnastics with over 40% of male gymnasts performing a variation of the Kovacs at the London 2012 Olympics. In the qualifying competition 84% of Kovacs were successfully regrasped, with the remaining 16% resulting in a fall. The aim of the present study was to determine why some gymnasts are more successful than others at regrasping the bar, with a secondary aim to determine how a less successful gymnast could alter his technique in order to become more successful. Nine performances of the Kovacs by each of two gymnasts, one 100% successful and one 11% successful, were analysed to determine differences in release and regrasp parameters. The technique of the less successful gymnast was optimised using a computer simulation model to increase the percentage of catches (success rate). The successful gymnast had larger and more consistent release windows and a radial velocity towards the bar at regrasp. The less successful gymnast had higher horizontal velocity at release and a mean radial velocity away from the bar at regrasp. Optimising his simulated technique increased the rate of success from 11% to 93%. The actions prior to release were performed earlier than in the recorded performances leading to a more vertical path of the mass centre at release and a radial velocity towards the bar at regrasp.

History

School

  • Sport, Exercise and Health Sciences

Published in

Journal of Biomechanics

Volume

49

Issue

16

Pages

3971 - 3976

Citation

HILEY, M.J. and YEADON, M.R., 2016. What governs successful performance of a complex whole body movement: The Kovacs release-regrasp on horizontal bar? Journal of Biomechanics, 49 (16), pp. 3971-3976.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

11/11/2016

Publication date

2016-11-16

Notes

This paper was accepted for publication in the journal Journal of Biomechanics and the definitive published version is available at http://dx.doi.org/10.1016/j.jbiomech.2016.11.048.

ISSN

0021-9290

eISSN

1873-2380

Language

en

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