Muscle coordination during breaststroke swimming: comparison between elite swimmers and beginners

Vaz, João R., Olstad, Bjørn Harald, Cabri, Jan, Kjendlie, Per-Ludvik, Pezarat-Correia, Pedro and Hug, François (2016) Muscle coordination during breaststroke swimming: comparison between elite swimmers and beginners. Journal of Sports Sciences, 1-8. doi:10.1080/02640414.2016.1143109

Author Vaz, João R.
Olstad, Bjørn Harald
Cabri, Jan
Kjendlie, Per-Ludvik
Pezarat-Correia, Pedro
Hug, François
Title Muscle coordination during breaststroke swimming: comparison between elite swimmers and beginners
Journal name Journal of Sports Sciences   Check publisher's open access policy
ISSN 1466-447X
Publication date 2016-02
Sub-type Article (original research)
DOI 10.1080/02640414.2016.1143109
Open Access Status Not Open Access
Start page 1
End page 8
Total pages 8
Place of publication Abingdon, Oxon, United Kingdom
Publisher Routledge
Collection year 2017
Language eng
Formatted abstract
The present study aimed to compare muscle coordination strategies of the upper and lower limb muscles between beginners and elite breaststroke swimmers. Surface electromyography (EMG) of eight muscles was recorded in 16 swimmers (8 elite, 8 beginners) during a 25 m swimming breaststroke at 100% of maximal effort. A decomposition algorithm was used to identify the muscle synergies that represent the temporal and spatial organisation of muscle coordination. Between-groups indices of similarity and lag times were calculated. Individual muscle patterns were moderately to highly similar between groups (between-group indices range: 0.61 to 0.84). Significant differences were found in terms of lag time for pectoralis major (P < 0.05), biceps brachii, rectus femoris and tibialis anterior (P < 0.01), indicating an earlier activation for these muscles in beginners compared to elites (range: −13.2 to −3.8% of the swimming cycle). Three muscle synergies were identified for both beginners and elites. Although their composition was similar between populations, the third synergy exhibited a high within-group variability. Moderate to high indices of similarity were found for the shape of synergy activation coefficients (range: 0.63 to 0.88) but there was a significant backward shift (−8.4% of the swimming cycle) in synergy #2 for beginners compared to elites. This time shift suggested differences in the global arm-to-leg coordination. These results indicate that the synergistic organisation of muscle coordination during breaststroke swimming is not profoundly affected by expertise. However, specific timing adjustments were observed between lower and upper limbs
Keyword Coordination
Muscle synergies
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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School of Health and Rehabilitation Sciences Publications
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