- Turkish Journal of Electrical Engineering and Computer Science
- Vol: 22 Issue: 3
- Correlation analysis between surface electromyography and continuous-wave near-infrared spectroscopy...
Correlation analysis between surface electromyography and continuous-wave near-infrared spectroscopy parameters during isometric exercise to volitional fatigue
Authors : Ömer ŞAYLİ, Ata AKIN, Hasan Birol ÇOTUK
Pages : 780-793
Doi:10.3906/elk-1210-51
View : 6 | Download : 3
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :In this study, the process of muscular fatigue was examined using surface electromyography (sEMG) and continuous-wave near-infrared spectroscopy (cw-NIRS) simultaneously during an isometric hand grip exercise at 50% and 75% of the maximal voluntary contraction (MVC), sustained until volitional fatigue. The mean frequency of the sEMG decreased during the whole exercise, whereas the root mean square had a tendency to increase. Oxyhemoglobin/deoxyhemoglobin concentration changes computed with cw-NIRS were found to exhibit a fast linear decrease/increase in the first 10--20 s of the exercise, the so-called fast phase, followed by a plateau-like slow phase. The change rates were higher at 75% MVC for both the sEMG and cw-NIRS parameters. Significant correlations were found, especially at 50% MVC, between the sEMG parameters computed for the whole exercise and cw-NIRS parameters computed from the early region of the exercise, i.e. infection duration and amplitude changes to the inflection point. The findings emphasize the potential of cw-NIRS for muscle studies.Keywords : Fatigue, oxygenation, near-infrared spectroscopy, surface electromyography, isometric exercise