Using EMG Amplitude and Frequency to Calculate a Multimuscle Fatigue Score and Evaluate Global Shoulder Fatigue

Human Factors
Alison C McDonaldPeter J Keir

Abstract

The authors developed a function to quantify fatigue in multiple shoulder muscles by generating a single score using relative changes in EMG amplitude and frequency over time. Evaluating both frequency and amplitude components of the electromyographic signal provides a more complete evaluation of muscle fatigue than either variable alone; however, little effort has been made to combine time and frequency domains for the evaluation of myoelectric fatigue. Surface EMG was measured from 14 shoulder muscles while participants performed simulated, repetitive work tasks until exhaustion. Each 60-s work cycle consisted of four tasks (dynamic push, dynamic pull, static drill, static force target matching task) scaled to participants' anthropometrics and strength. The function was generated to calculate a multimuscle fatigue score (MMFS) based on changes in EMG frequency, amplitude, and the number of muscles showing signs of myoelectric fatigue (increase in EMG amplitude; decrease in EMG frequency). The function was evaluated through changes in MMFS over time: first (31.8 ± 14.6), middle (47.6 ± 25.3), last (58.6 ± 35.5) reference exertions ( p < .05). The evaluation of the relationships between MMFS and changes in strength ( r = -0.510...Continue Reading

References

Jun 1, 1979·IEEE Transactions on Bio-medical Engineering·C J De Luca
Sep 2, 2000·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·B GerdleS Karlsson
Apr 7, 2005·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Richard A EkstromRobert A Donatelli
Apr 11, 2006·IEEE Transactions on Bio-medical Engineering·Dawn T MacIsaacDaniel R Rogers
Aug 19, 2007·The Journal of Physiology·Roger M Enoka, Jacques Duchateau
Jun 6, 2008·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Craig E BoettcherIan Cathers
Nov 26, 2009·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Danielle L WaiteClark R Dickerson
Dec 8, 2009·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Daniel R Rogers, Dawn T Macisaac
May 5, 2010·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Jakob L DideriksenRoger M Enoka
Jun 1, 1997·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·J R Potvin, L R Bent
Mar 24, 2012·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Miriam González-IzalMikel Izquierdo
Jul 23, 2013·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Joanne N Hodder, Peter J Keir
Jun 17, 2015·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Alison C McDonaldPeter J Keir
Jul 26, 2015·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Calvin T F TsePeter J Keir
Mar 12, 2017·Sports Medicine·D MicklewrightA Al Salman

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SPSS Statistics
EMGworks

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