Reliability of Low-Cost Near-Infrared Spectroscopy in the Determination of Muscular Oxygen Saturation and Hemoglobin Concentration during Rest, Isometric and Dynamic Strength Activity

Claudia Miranda-Fuentes, Isabel María Guisado-Requena, Pedro Delgado-Floody, Leonidas Arias-Poblete, Alejandro Pérez-Castilla, Daniel Jerez-Mayorga and Luis Javier Chirosa-Rios
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Claudia Miranda-Fuentes: Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18011 Granada, Spain
Isabel María Guisado-Requena: Department of Nursing, Physiotherapy and Occupational Therapy, Faculty of Nursing, Group of Preventive Activities in the University Health Sciences Setting, University of Castilla-La Mancha (Universidad de Castilla-La Mancha/UCLM), 02071 Albacete, Spain
Pedro Delgado-Floody: Department of Physical Education, Sports and Recreation, Universidad de La Frontera, 4811230 Temuco, Chile
Leonidas Arias-Poblete: Faculty of Rehabilitation Sciences, Universidad Andres Bello, 7591538 Santiago, Chile
Alejandro Pérez-Castilla: Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18011 Granada, Spain
Daniel Jerez-Mayorga: Faculty of Rehabilitation Sciences, Universidad Andres Bello, 7591538 Santiago, Chile
Luis Javier Chirosa-Rios: Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18011 Granada, Spain

IJERPH, 2020, vol. 17, issue 23, 1-13

Abstract: Background: The objective of this study was to establish the reliability of the Humon Hex near-infrared reflectance spectroscopy (NIRS) in determining muscle oxygen saturation (SmO 2 ) and hemoglobin concentration (Hgb) at rest and during isometric and dynamic strength exercises using a functional electromechanical dynamometer (FEMD). Methods: The SmO 2 and Hgb values of sixteen healthy adults (mean ± standard deviation (SD): Age = 36.1 ± 6.4 years) were recorded at rest and during isometry (8 s), dynamic strength I (initial load of 40% of the average isometric load, with 2 kg increments until muscle failure) and dynamic strength II (same as I, but with an initial load of 40% of the maximum isometric load) activity. To evaluate the reliability in the determination of SmO 2 and Hgb of this device, intraclass correlation coefficient (ICC), standard error of measurement (SEM) and coefficient of variation (CV) were obtained. Results: The main results obtained are SmO 2 at rest (CV = 5.76%, SEM = 3.81, ICC = 0.90), isometric strength (CV = 3.03%, SEM = 2.08, ICC = 0.92), dynamic strength I (CV = 10.6, SEM = 7.17, ICC = 0.22) and dynamic strength II (CV = 9.69, SEM = 6.75, ICC = 0.32); Hgb at rest (CV = 1.97%, SEM = 0.24, ICC = 0.65), isometric strength (CV = 0.98%, SEM = 0.12, ICC = 0.96), dynamic strength I (CV = 3.25, SEM = 0.40, ICC = 0.54) and dynamic strength II (CV = 2.74, SEM = 0.34, ICC = 0.65). Conclusions: The study shows that Humon Hex is a reliable device to obtain SmO 2 and Hgb data in healthy adult subjects at rest and during isometric strength, providing precision for measurements made with this device.

Keywords: strength training; dynamometer; tissue saturation; hemoglobin (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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