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Wearable near-infrared spectroscopy: reliability and sensitivity among different endurance cycling exercise intensities

Authors :
J.S. Hasegawa
R.A. Azevedo
A.C. Silveira
A.E. Lima-Silva
R. Bertuzzi
Source :
Brazilian Journal of Medical and Biological Research, Vol 57 (2024)
Publication Year :
2024
Publisher :
Associação Brasileira de Divulgação Científica, 2024.

Abstract

The present study investigated the reliability and sensitivity of a wearable near-infrared spectroscopy (wNIRS) device in moderate and heavy exercise intensity domains. On three separate days, eleven males performed an incremental test to exhaustion, and in the following visits, four submaximal constant-load bouts (i.e., test and retest) were performed in the moderate-intensity domain (100 and 130 W) and heavy-intensity domain (160 and 190 W). The local tissue oxygen saturation index (SmO2) and pulmonary oxygen uptake (V̇O2) were measured continuously. The absolute SmO2 and V̇O2 values and the change (Δ) from the 3rd to 6th min of exercise were calculated. There was good reliability for SmO2 measurements, as indicated by the high intraclass correlation coefficient analysis (ICC ≥0.84 for all) and low coefficient of variation between the two trials (CV ≤4.1% for all). Steady-state responses were observed for SmO2 and V̇O2 from the 3rd to the 6th min in the two moderate-intensity bouts (P>0.05), whereas SmO2 decreased and V̇O2 increased from the 3rd to the 6th min in the two heavy-intensity bouts (P

Details

Language :
English
ISSN :
1414431X and 1414431x
Volume :
57
Database :
Directory of Open Access Journals
Journal :
Brazilian Journal of Medical and Biological Research
Publication Type :
Academic Journal
Accession number :
edsdoj.08b6b108788644ae95f571f92c0640ba
Document Type :
article
Full Text :
https://doi.org/10.1590/1414-431x2024e13102