Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Coorevits, Pascal; Danneels, Lieven; Cambier, Dirk; Ramón, Herman; Druyts, Hans; Karlsson, Johannes; Moor, Georges De; Vanderstraeten, Guy

doi:10.1016/j.jelekin.2007.01.007

Cited by 41 publications

(30 citation statements)

References 46 publications

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“…The greater the external force, the greater the values of bRMS (corresponding to the beginning of the tests) and the lower the values of bMPF. Those results confirmed previous research showing similar relationships [7,8,9,10,20,21].…”

Section: Discussionsupporting

confidence: 93%

“…Numerous studies indicate the relationship between the amplitude of the EMG signal and the force developed by muscles [18,19,20,21]. Moreover, many studies confirm the influence of the level of muscle load on the values of the parameters characterizing the power spectrum of the EMG signal [6,7,8,9,10] and indicating muscle fatigue. Thus, it can be assumed that EMG is a method suitable for assessing muscle fatigue.…”

Section: Introductionmentioning

confidence: 96%

“…This method makes it possible to estimate fatigue on the basis of the electrical signal registered from muscles during their activation [3,4,5,6,7,8,9,10,11,12]. The registration of an electrical signal with surface electrodes is commonly used to assess muscle load and fatigue during occupational tasks [13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Fatigue on Muscle Temperature

Bartuzi

Roman-Liu

Wiśniewski

2012

International Journal of Occupational Safety and Ergonomics

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 96%

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The Influence of Fatigue on Muscle Temperature

Bartuzi

Roman-Liu

Wiśniewski

2012

International Journal of Occupational Safety and Ergonomics

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“…Reliability refers to the consistency of a measurement tool 21,22 or the absence of measurement error. 23 To determine the difference between participants, reliability is best described as a ratio of variance based on the between-participants variability compared with the variance within participants.…”

Section: Discussionmentioning

confidence: 99%

Reliability and Validity of the INFOOT Three-dimensional Foot Digitizer for Patients with Rheumatoid Arthritis

Mits

Coorevits

Clercq

et al. 2011

Journal of the American Podiatric Medical Association

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“…DWT as a method of multi-resolution analysis has been used successfully for processing the occurrence of frequency alterations in biological signals such as EMG of compound potentials (Daubechies 1992;Coorevits et al 2008), EEG (Subasi et al 2005), ECG (Froesea et al 2006) caused by different physical and chemical influences.…”

Section: Introductionmentioning

confidence: 99%

Three methods for estimation of changes in frequency characteristics of potentials elicited by long-lasting (fatiguing) activity of isolated muscle fibres

Vukova¹,

Dimitrov²,

Radicheva³

2010

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Abstract. The present study was assigned to compare the applicability and sensitivity of three different methods (discrete wavelet transforms (DWT), median frequency (MDF) -calculated on the basis of fast Fourier transform, and spectral indices) for analysis of frequency content changes in potentials produced by repetitive stimulation from isolated slow (SMFs)-and fast (FMFs)-fatigable muscle fibers during uninterrupted activity. In order to affect fatigue, prior to starting the fatiguing stimulation (5 Hz), some of the fibres were exposed to microwave electromagnetic field and others were sham exposed. All the methods studied demonstrated that during a long-lasting fibre activity, the shift of the potential frequency content to lower frequencies was a consequence of lowering in higher frequency components and increasing in low frequency ones. The changes were faster in FMFs than SMFs and stronger in sham exposed fibres vs. microwave exposed. The MDF alterations in both fibre types and protocols were quite similar to other methods characterizing either individual changes in low and high frequency scales of the signal (discrete wavelet transform -DWT) or changes in their spectral ratio (spectral indices). The spectral indices showed sensitivity to fatigue effect at the final stages that made their changes considerably non-linear. DWT allowed processing the temporal occurrence of frequency content changes that corresponded to the alterations in the separate potential phases as well as earlier detection and precise evaluation of fatigue onset and progressing.All methods are applicable but DWT is a preferable for study of muscle fibre fatigue in clinical and experimental neurophysiology.

show abstract

Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Cited by 41 publications

References 46 publications

The Influence of Fatigue on Muscle Temperature

The Influence of Fatigue on Muscle Temperature

Reliability and Validity of the INFOOT Three-dimensional Foot Digitizer for Patients with Rheumatoid Arthritis

Three methods for estimation of changes in frequency characteristics of potentials elicited by long-lasting (fatiguing) activity of isolated muscle fibres

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