Differences in activation patterns between eccentric and concentric muscle contractions

DOI

10.2991/icistis-19.2019.61How to use a DOI?

Keywords

electromyography, EMG, fast fibers, spectral analysis, average frequency.

Abstract

The purpose of the article is is to compare the frequency of the power spectrum and the amplitude of the surface electromyographic (EMG) signal of the biceps during eccentric and concentric contractions of different intensity to indirectly evaluate possible differences in movement recruitment. Materials and methods: the bioelectric activity of the biceps was studied during the flexion of the forearm with a bar. Eight trained men and one woman performed the exercise in eccentric and concentric modes of muscle contraction with an intensity of 100%, 80%, 50% and 25% of the maximum voluntary contractions. Results: analysis of the surface electromyogram showed that the average frequency was higher for the eccentric, compared with the concentric contractions of the biceps for the studied intensities. Conclusion: the data obtained suggest that a higher average frequency in the eccentric mode of contraction indicates a higher activity of rapidly contracting motor units compared to the concentric mode.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ksenia Sergeeva
AU  - Ritta Tambovtseva
PY  - 2019/11
DA  - 2019/11
TI  - Differences in activation patterns between eccentric and concentric muscle contractions
BT  - Proceedings of the 4th International Conference on Innovations in Sports, Tourism and Instructional Science (ICISTIS 2019)
PB  - Atlantis Press
SP  - 240
EP  - 244
SN  - 2468-5739
UR  - https://doi.org/10.2991/icistis-19.2019.61
DO  - 10.2991/icistis-19.2019.61
ID  - Sergeeva2019/11
ER  -