IMPACT OF SKINFOLD THICKNESS ON WAVELET-BASED MECHANOMYOGRAPHIC SIGNAL

Eddy Krueger, Eduardo M. Scheeren, Carla Daniele Pacheco Rinaldin, André E. Lazzaretti, Eduardo Borba Neves, Guilherme Nunes Nogueira-Neto, Percy Nohama

DOI Number
10.22190/FUME170602001K
First page
359
Last page
368

Abstract


Surface mechanography (MMG) is a non-invasive technique that captures signs of low-frequency vibrations of skeletal muscles through the skin. However, subcutaneous structures may interfere with the acquisition of MMG signals. The objective of this study was to verify the influence of skinfold thickness (ST) on the MMG wavelet-based signal in the rectus femoris muscle during maximal voluntary contraction in two groups of individuals: group I (n = 10, ST <10 mm ) and group II (n = 10, ST equal to or> 20 mm). Negative correlation was observed between the 19 Hz, 28 Hz and 39 Hz frequency bands with ST. There was a statistical difference in almost all frequency bands, especially in the X and Y axes. All MMG axes in group II presented higher magnitudes in frequency bands 2 and 6 Hz (like low-pass filter). Thus, these results can be applied to calibrate MMG responses as biofeedback systems.

Keywords

Skinfold thickness, Wavelet, Mechanomyography

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References


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DOI: https://doi.org/10.22190/FUME170602001K

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