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Design and Evaluation of an Electrical Bioimpedance Device Based on DIBS for Myography during Isotonic Exercises

Departamento de Engenharia Elétrica, Universidade do Estado de Santa Catarina (UDESC), Rua Paulo Malschitzki, 200, Zona Industrial Norte, Joinville, Santa Catarina 89219-710, Brazil
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J. Low Power Electron. Appl. 2018, 8(4), 50; https://doi.org/10.3390/jlpea8040050
Received: 7 November 2018 / Revised: 11 December 2018 / Accepted: 12 December 2018 / Published: 15 December 2018
Electrical Bioimpedance Spectroscopy (EIS) is a technique used to assess passive electrical properties of biological materials. EIS detects physiological and pathological conditions in animal tissues. Recently, the introduction of broadband excitation signals has reduced the measuring time for application techniques such as Electrical Bioimpedance Myography. Therefore, this work is aimed at proposing a prototype by using discrete interval binary sequences (DIBS), which is based on a system that holds a current source, impedance acquisition system, microcontroller and graphical user interface. Measurements between 5 Ω to 5 kΩ had impedance acquisition and phase angle errors of aproximately 2% and were lower than 3 degrees, respectively. Based on a proposed circuit, bioimpedance of the chest muscle (Pectoralis Major) was measured during isotonic exercise (push-up). As a result, our analyses have detected tiredness and fatigue. We have explored and proposed new parameters which assess such conditions, as both the maximum magnitude and tiredness coefficient. These parameters decrease exponentially with consecutive push-ups and were convergent in the majority of the sixteen days of measurement. View Full-Text
Keywords: electrical bioimpedance; myography; DIBS electrical bioimpedance; myography; DIBS
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Sirtoli, V.; Morcelles, K.; Gomez, J.; Bertemes-Filho, P. Design and Evaluation of an Electrical Bioimpedance Device Based on DIBS for Myography during Isotonic Exercises. J. Low Power Electron. Appl. 2018, 8, 50.

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