Open AccessSustained fatigue assessment during isometric exercises with time-domain near infrared spectroscopy and surface electromyography signals
Author(s) -
Alessandro Scano,
Ileana Pirovano,
Marta Elisa Manunza,
Lorenzo Spinelli,
Davide Contini,
Alessandro Torricelli,
Rebecca Re
Publication year - 2020
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.403976
Subject(s) - isometric exercise , electromyography , gold standard (test) , biomedical engineering , muscle fatigue , medicine , deltoid curve , physical medicine and rehabilitation , cardiology , anatomy
The effect of sustained fatigue during an upper limb isometric exercise is presented to investigate a group of healthy subjects with simultaneous time-domain (TD) NIRS and surface electromyography (sEMG) recordings on the deltoid lateralis muscle. The aim of the work was to understand which TD-NIRS parameters can be used as descriptors for sustained muscular fatigue, focusing on the slow phase of this process and using median frequency (MF) computed from sEMG as gold standard measure. It was found that oxygen saturation and deoxy-hemoglobin are slightly better descriptors of sustained fatigue, than oxy-hemoglobin, since they showed a higher correlation with MF, while total-hemoglobin correlation with MF was lower.