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Time Domain Features of Multi-channel EMG Applied to Prediction of Physiological Parameters in Fatiguing Bicycling Exercises
Kaunas University of Technology, Kaunas, Lithuania.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.ORCID iD: 0000-0003-2185-8973
Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).ORCID iD: 0000-0002-9337-5113
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
2015 (English)In: Frontiers in Artificial Intelligence and Applications, ISSN 0922-6389, E-ISSN 1879-8314, Vol. 278, 118-127 p.Article in journal (Refereed) Published
Abstract [en]

A set of novel time-domain features characterizing multi-channel surface EMG (sEMG) signals of six muscles (rectus femoris, vastus lateralis, and semitendinosus of each leg) is proposed for prediction of physiological parameters considered important in cycling: blood lactate concentration and oxygen uptake. Fifty one different features, including phase shifts between muscles, active time percentages, sEMG amplitudes, as well as symmetry measures between both legs, were defined from sEMG data and used to train linear and random forest models. The random forests models achieved the coefficient of determination R2 = 0:962 (lactate) and R2 = 0:980 (oxygen). The linear models were less accurate. Feature pruning applied enabled creating accurate random forest models (R2 >0:9) using as few as 7 (lactate) or 4 (oxygen) time-domain features. sEMG amplitude was important for both types of models. Models to predict lactate also relied on measurements describing interaction between front and back muscles, while models to predict oxygen uptake relied on front muscles only, but also included interactions between the two legs. © 2015 The authors and IOS Press. All rights reserved.

Place, publisher, year, edition, pages
Amsterdam: IOS Press, 2015. Vol. 278, 118-127 p.
Keyword [en]
random forests, electromyography, muscle activation patterns, fatigue detection, bicycling
National Category
Medical Engineering
Identifiers
URN: urn:nbn:se:hh:diva-29666DOI: 10.3233/978-1-61499-589-0-118Scopus ID: 2-s2.0-84963682719OAI: oai:DiVA.org:hh-29666DiVA: diva2:862405
Available from: 2015-10-22 Created: 2015-10-22 Last updated: 2017-08-18Bibliographically approved

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CiteExportLink to record
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