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Title: What governs successful performance of a complex whole body movement: The Kovacs release-regrasp on horizontal bar?
Authors: Hiley, Michael J.
Yeadon, Maurice R.
Keywords: Simulation
Optimisation
Gymnastics
Technique
Variability
Issue Date: 2016
Publisher: © Elsevier
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.
Abstract: 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.
Description: This paper is closed access until 16th November 2017.
Version: Accepted for publication
DOI: 10.1016/j.jbiomech.2016.11.048
URI: https://dspace.lboro.ac.uk/2134/23900
Publisher Link: http://dx.doi.org/10.1016/j.jbiomech.2016.11.048
ISSN: 0021-9290
Appears in Collections:Closed Access (Sport, Exercise and Health Sciences)

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