Catapult effect in pole vaulting: Is muscle coordination determinant?

Frere, Julien, Goepfert, Beat, Hug, Francois, Slawinski, Jean and Tourny-Chollet, Claire (2012) Catapult effect in pole vaulting: Is muscle coordination determinant?. Journal of Electromyography and Kinesiology, 22 1: 145-152. doi:10.1016/j.jelekin.2011.10.001

Author Frere, Julien
Goepfert, Beat
Hug, Francois
Slawinski, Jean
Tourny-Chollet, Claire
Title Catapult effect in pole vaulting: Is muscle coordination determinant?
Journal name Journal of Electromyography and Kinesiology   Check publisher's open access policy
ISSN 1050-6411
Publication date 2012-02
Sub-type Article (original research)
DOI 10.1016/j.jelekin.2011.10.001
Volume 22
Issue 1
Start page 145
End page 152
Total pages 8
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract
This study focused on the phase between the time of straightened pole and the maximum height (HP) of vaulter and aimed at determining the catapult effect in pole vaulting on HP. Seven experienced vaulters performed 5-10 vaults recorded by two video cameras, while the surface electromyography (sEMG) activity of 10 upper limbs muscles was recorded. HP was compared with an estimated maximum height (HP est) allowing the computation of a push-off index. Muscle synergies were extracted from the sEMG activity profiles using a non-negative matrix factorization algorithm. No significant difference (p>0.47) was found between HP est (4.64±0.21m) and HP (4.69±0.23m). Despite a high inter-individual variability in sEMG profiles, two muscle synergies were extracted for all the subjects which accounted for 96.1±2.9% of the total variance. While, the synergy activation coefficients were very similar across subjects, a higher variability was found in the muscle synergy vectors. Consequently, whatever the push-off index among the pole vaulters, the athletes used different muscle groupings (i.e., muscle synergy vectors) which were activated in a similar fashion (i.e., synergy activation coefficients). Overall, these results suggested that muscle coordination adopted between the time of straightened pole and the maximum height does not have a major influence on HP.
Keyword Electromyography
Motion analysis
Non-negative matrix factorization
Sport performance
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Health and Rehabilitation Sciences Publications
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Created: Wed, 28 Aug 2013, 16:07:30 EST by Francois Hug on behalf of School of Health & Rehabilitation Sciences