Electromyographic Analysis of the Swim Start - Bilateral Comparison of the Front-weighted and Rear-weighted Track Start from the OMEGA OSB11 Starting Block

Janna Brit Langholz; Gunnar Westman; Magnus Karlsteen; Christian Finnsgård

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Paper

Electromyographic Analysis of the Swim Start - Bilateral Comparison of the Front-weighted and Rear-weighted Track Start from the OMEGA OSB11 Starting Block

In Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support - Volume 1: WPPDSports, 310-320, 2015 , Lisbon, Portugal

Authors: Janna Brit Langholz ¹ ; Gunnar Westman ¹ ; Magnus Karlsteen ¹ and Christian Finnsgård ²

Affiliations: ¹ Chalmers University of Technology and Centre for Sports Technology, Sweden ; ² Chalmers University of Technology, Centre for Sports Technology and SSPA Sweden AB, Sweden

Keyword(s): Swimming, Swim Start, Electromyography, Muscle Activity, Competition Block.

Abstract: Previous swim start studies involving electromyography (EMG) consistently comprised unilateral measurements and the attachment of the swimmer via cables to a computer. Therefore the present work aims for an overall picture of the muscle activation pattern during the swim start by conducting bilateral measurements with minimal restriction of motion. On that account a multichannel surface EMG device with a wireless Bluetooth connection and videography is utilized in order to assess the nowadays most common start dive techniques of competitive swimming events - differently weighted track starts from the OMEGA OSB11 starting block. The data analysis identified that the normalized muscle activation levels were higher during the front-weighted than during the rear-weighted start - probably caused by shorter block times and less contribution of the arms. Furthermore the onset of the muscle activation seems to be different in between start dive techniques, as for instance the muscles of the rear leg commence contracting earlier while the muscles of the front leg start later in the rear-weighted compared to front-weighted starts. It is highly likely that this originates in the position of the center of mass relative to the muscles. A general overview over the coordination of the different muscles could also be obtained: It became obvious that some muscles are the main drivers of the swim start (vastus lateralis, soleus) whereas others rather exerted supportive actions (gluteus maximus, semitendinosus, erector spinae longissimus). (More)

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Paper citation in several formats:

Brit Langholz, J.; Westman, G.; Karlsteen, M. and Finnsgård, C. (2015). Electromyographic Analysis of the Swim Start - Bilateral Comparison of the Front-weighted and Rear-weighted Track Start from the OMEGA OSB11 Starting Block. In Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support (icSPORTS 2015) - WPPDSports; ISBN 978-989-758-159-5; ISSN 2184-3201, SciTePress, pages 310-320. DOI: 10.5220/0005714703100320

@conference{wppdsports15,
author={Janna {Brit Langholz}. and Gunnar Westman. and Magnus Karlsteen. and Christian Finnsgård.},
title={Electromyographic Analysis of the Swim Start - Bilateral Comparison of the Front-weighted and Rear-weighted Track Start from the OMEGA OSB11 Starting Block},
booktitle={Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support (icSPORTS 2015) - WPPDSports},
year={2015},
pages={310-320},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005714703100320},
isbn={978-989-758-159-5},
issn={2184-3201},
}

TY - CONF

JO - Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support (icSPORTS 2015) - WPPDSports
TI - Electromyographic Analysis of the Swim Start - Bilateral Comparison of the Front-weighted and Rear-weighted Track Start from the OMEGA OSB11 Starting Block
SN - 978-989-758-159-5
IS - 2184-3201
AU - Brit Langholz, J.
AU - Westman, G.
AU - Karlsteen, M.
AU - Finnsgård, C.
PY - 2015
SP - 310
EP - 320
DO - 10.5220/0005714703100320
PB - SciTePress