Limit cycle dynamics of the gymnastics longswing

Vicinanza, Domenico and Newell, Karl and Irwin, Gareth and Smith, Lee and Williams, Genevieve K. R. (2018) Limit cycle dynamics of the gymnastics longswing. Human Movement Science, 57. pp. 217-226. ISSN 1872-7646

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Official URL: https://doi.org/10.1016/j.humov.2017.12.014

Abstract

The purpose of the study was to examine the macroscopic dynamics of the longswing through a limit cycle analysis of the motion of the center of mass (CM) as a function of skill level. One elite international, five gymnasts able to perform release and regrasp skills, five gymnasts unable to perform release and regrasp skills, and five novice gymnasts each performed four consecutive longswings on a high bar. Kinematic data were collected to facilitate the calculation of the center of mass position of the performer during swinging. Poincare plots were used to explore the limit cycle dynamics of the center of mass movement. The attractor dynamic was very close to a one-dimensional limit cycle for the elite (D=1.18) but higher for the release and regrasp group (D = 1.35 ± 0.06) and non-release and regrasp group (D = 1.37 ± 0.07). The novice dynamic was characterized by a two-dimensional limit cycle (D = 2.49 ± 0.28) that also had more variability and lower determinism. In the frequency domain, Inharmonicity was lower and the Q factor higher as a function of increased skill level. The findings show that the dynamical degrees of freedom of the CM in the skilled performance were reduced compared to those of novices and represented a more efficient and predictive, rather than exploratory, technique.

Item Type: Journal Article
Keywords: dynamical systems, motor control, gymnastics
Faculty: ARCHIVED Faculty of Science & Technology (until September 2018)
Depositing User: Lee Smith
Date Deposited: 22 Dec 2017 09:41
Last Modified: 14 Nov 2019 16:09
URI: http://arro.anglia.ac.uk/id/eprint/702561

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