Surface EMG based muscle fatigue evaluation in biomechanics

Cifrek, Mario; Medved, Vladimir; Tonković, Stanko; Ostojić, Saša

doi:10.1016/j.clinbiomech.2009.01.010

Cited by 718 publications

(544 citation statements)

References 74 publications

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“…One consequence of muscle contraction is the increase in the concentration of lactic acid, a metabolic product (Cifrek et al 2009). During sustained isometric contractions, in which the muscle length and tension are held constant, the increased concentration of lactates is responsible for changes in intracellular pH and, as a result, muscle fiber conduction velocity (CV) decreases (Brody et al 1991), directly changing the shape of the motor unit action potential (MUAP) waveform (Cifrek et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…During sustained isometric contractions, in which the muscle length and tension are held constant, the increased concentration of lactates is responsible for changes in intracellular pH and, as a result, muscle fiber conduction velocity (CV) decreases (Brody et al 1991), directly changing the shape of the motor unit action potential (MUAP) waveform (Cifrek et al 2009). This phenomenon is correlated with a decrease of the mean (MNF) and median (MDF) frequencies of the spectra of surface electromyographic (S-EMG) signals (Sadoyama et al 1988).…”

Section: Introductionmentioning

confidence: 99%

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On the behavior of surface electromyographic variables during the menstrual cycle

et al. 2011

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The goal of this work is to study the behavior of electromyographic variables during the menstrual cycle. Ten female volunteers (24.0 ± 2.8 years of age) performed fatiguing isometric contractions, and electromyographic signals were measured on the biceps brachii in four phases of the menstrual cycle. Adaptations of classical algorithms were used for the estimation of the root mean square (RMS) value, absolute rectified value (ARV), mean frequency (MNF), median frequency (MDF), and conduction velocity (CV). The CV estimator had a higher (p = 0.002) rate of decrease at the end of the follicular phase and at the end of the luteal phase. The MDF (p = 0.002) and MNF (p = 0.004) estimators had a higher rate of decrease at the beginning of the follicular phase and at the end of the luteal phase. No significant differences between phases of the menstrual cycle were detected with the ARV and RMS estimators (p > 0.05). These results suggest that the behavior of the muscles in women presents different characteristics during different phases of the menstrual cycle. In particular, women were more susceptible to fatigue at the end of the luteal phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the behavior of surface electromyographic variables during the menstrual cycle

et al. 2011

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“…Median frequency is commonly used to detect fatigue from EMG signals [5] to determine the pattern of motor unit activity [11]. Previously, Morel et al [13] reported a significant reduction (21 %) in EMG (root mean square) of the vastus lateralis following five maximal static scrums lasting 5 s each.…”

Section: Discussionmentioning

confidence: 99%

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2017

Sports Med Int Open

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“…Sabe-se que a fadiga muscular é um processo que gera alterações nos padrões de ativação muscular, tendo a análise do sinal eletromiográfico (EMG) importante papel na sua avaliação (CIFREK et al, 2009;DIDERIKSEN et al, 2010). Desta maneira, entende-se que ela pode ser usada como uma ferramenta que permite avaliar as alterações decorrentes da fadiga muscular, tendo em vista que os processos fisiológicos que reduzem a capacidade do músculo em gerar força provavelmente começam antes que esse declínio possa ser observado (ROGERS; MACISAAC, 2010).…”

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Análise da reprodutibilidade de parâmetros no domínio da frequência do sinal EMG utilizados na caracterização da fadiga muscular localizada

Silva

Geres

Kuriki

et al. 2012

Motriz: rev. educ. fis.

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A fadiga muscular pode ser definida como qualquer redução na capacidade do sistema neuromuscular em gerar força (ZWARTS et al., 2008). A perda da capacidade do músculo em gerar força pode ter duas origens: uma central e uma periférica. A fadiga de origem central pode ser definida como uma degradação progressiva Motriz, Rio Claro, v.18 n.3, p.456-464, jul./set. 2012 Analysis of reliability of EMG signal frequency domain parameters used in the characterization of localized muscle fatigueAbstract: The aim of this study was to analyze the reproducibility of the electromyography signal´s parameters (EMG) in the frequency domain used in the characterization of localized muscle fatigue. Fifteen male subjects underwent a fatigue test based on isometric knee extension, being held at three different times at intervals of seven days. To assess the reproducibility of data between the tests we calculated the correlation coefficient (ICC) for the median frequency (MF) in total exercise time (MF T ), MF obtained for every 10% of exercise time (MF 10% ) and the powers of the frequency bands obtained by dividing the power spectrum at windows of 20 Hz. The results showed: (1) excellent reproducibility for MF T , (2) good reproducibility for MF 10% , and (3) greater variation in the signal EMG bands from 20 to 120 Hz, especially at the bands of 20-40 Hz and 40-60 Hz, which showed greater sensitivity to the process of muscle fatigue. We conclude that the MF is a variable that shows good reproducibility and that the fragmented analysis of the power spectrum, by means of frequency bands, showed that significant variations occur in the EMG signal during the installation of the fatigue process, having potential to become a new method for the characterization of localized muscle fatigue.

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Surface EMG based muscle fatigue evaluation in biomechanics

Cited by 718 publications

References 74 publications

On the behavior of surface electromyographic variables during the menstrual cycle

On the behavior of surface electromyographic variables during the menstrual cycle

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Análise da reprodutibilidade de parâmetros no domínio da frequência do sinal EMG utilizados na caracterização da fadiga muscular localizada

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