Analysis of musle fatigue induced by isometric vibration exercise at varying frequencies

M. Mischi, C. Rabotti, M. (Marco) Cardinale

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)

Abstract

An increase in neuromuscular activity, measured by electromyography (EMG), is usually observed during vibration exercise. The underlying mechanisms are however unclear, limiting the possibilities to introduce and exploit vibration training in rehabilitation programs. In this study, a new training device is used to perform vibration exercise at varying frequency and force, therefore enabling the analysis of the relationship between vibration frequency and muscle fatigue. Fatigue is estimated by maximum voluntary contraction measurement, as well as by EMG mean-frequency and conductionvelocity analysis. Seven volunteers performed five isometric contractions of the biceps brachii with a load consisting of a baseline of 80% of their maximum voluntary contraction (MVC), with no vibration and with a superimposed 20, 30, 40, and 50 Hz vibrational force of 40 N. Myoelectric and mechanical fatigue were estimated by EMG analysis and by assessment of the MVC decay, respectively. A dedicated motion artifact canceler, making use of accelerometry, is proposed to enable accurate EMG analysis. Use of this canceler leads to better interpolation of myoelectric fatigue trends and to better correlation between mechanical and myoelectric fatigue. In general, our results suggest vibration at 30 Hz to be the most fatiguing exercise. These results contribute to the analysis of vibration exercise and motivate further research aiming at improved training protocols.
Original languageEnglish
Title of host publicationProceedings of 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS), 28 August - 1 September 2012, San Diego, California
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages6463-6466
ISBN (Print)978-1-4577-1787-1
DOIs
Publication statusPublished - 2012
Event34th Annual International Conference of the IEEE EMBS, 28 August - 1 September 2012, San Diego, California - San Diego, California, United States
Duration: 28 Aug 20121 Sep 2012

Conference

Conference34th Annual International Conference of the IEEE EMBS, 28 August - 1 September 2012, San Diego, California
CountryUnited States
CitySan Diego, California
Period28/08/121/09/12
Other34th Annual International Conference of the IEEE EMBS

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    Mischi, M., Rabotti, C., & Cardinale, M. M. (2012). Analysis of musle fatigue induced by isometric vibration exercise at varying frequencies. In Proceedings of 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS), 28 August - 1 September 2012, San Diego, California (pp. 6463-6466). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/EMBC.2012.6347474