Quadriceps muscle fatigue and comfort generated by neuromuscular electrical stimulation with current modulated waveforms

Tiago Araújo, Ana Anjos, Neuza Nunes, Pedro Rebelo, Hugo Gamboa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Introduction: Neuromuscular electrical stimulation (NMES) is used by physical therapists in the clinic. The efficacy of NMES is limited by the rapid onset muscle fatigue. The role of NMES parameters is muscle fatigue is not clear. Objective: To determine the effects of shape waveform on muscle fatigue, during NMES. Methods: Twelve healthy subjects participated in the study. Subjects were assigned to 1 of 3 groups, randomly. Group assignment determined the order in which they were tested using 3 different shape waveforms. Maximal voluntary isometric contraction (MVIC) was measured during the first session. Fatigue test was applied with amplitude required to elicit 50% of the MVIC. In each 3 testing sessions torque of contraction and level comfort were measured, and percent fatigue was calculated. Analysis of variance tests for dependent samples was used to determine the effect of shape waveform on muscle fatigue and comfort scores Results: The results showed no one shape waveform was most fatigable and that SQ wave induced more uncomfortable stimulus.

Original languageEnglish
Title of host publicationBIOSIGNALS 2015 - 8th International Conference on Bio-Inspired Systems and Signal Processing, Proceedings; Part of 8th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2015
EditorsH. Gamboa , A. Fred , D. Elias , H. Loose
PublisherSciTePress
Pages92-98
Number of pages7
ISBN (Electronic)978-989758069-7
Publication statusPublished - 2015
Event8th International Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2015 - Lisbon, Portugal
Duration: 12 Jan 201515 Jan 2015

Conference

Conference8th International Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2015
CountryPortugal
CityLisbon
Period12/01/1515/01/15

Keywords

  • Fatigue
  • Neuromuscular Electrical Stimulation
  • Waveform

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