Preliminary vastus lateralis characterization with time domain near infrared spectroscopy during incremental cycle exercise

I. Pirovano; S. Porcelli; F. Azzarello; R. Re; L. Spinelli; D. Contini; M. Marzorati; A. Torricelli

doi:10.1117/12.2527068

11 July 2019 Preliminary vastus lateralis characterization with time domain near infrared spectroscopy during incremental cycle exercise

I. Pirovano, S. Porcelli, F. Azzarello, R. Re, L. Spinelli, D. Contini, M. Marzorati, A. Torricelli

Author Affiliations +

Proceedings Volume 11074, Diffuse Optical Spectroscopy and Imaging VII; 1107424 (2019) https://doi.org/10.1117/12.2527068
Event: European Conferences on Biomedical Optics, 2019, Munich, Germany

Abstract

Functional near infrared spectroscopy (NIRS) is a widespread non-invasive technique to monitor skeletal muscle metabolism. However, only variation of oxygenated (HHb), deoxygenated (O₂Hb), total (tHb) hemoglobin and saturation (SO₂) are usually reported. In this study, Time Domain (TD) NIRS approach was exploited to perform a preliminary quantitative characterization of vastus lateralis muscle during incremental exercise. A population of 11 healthy young male subjects performed on a mechanical cycle ergometer an incremental exercise (initial work rate range = 60-96 W, increment = 12-18 W/min) until exhaustion. TD NIRS, heart rate, pulmonary ventilation (VE), O₂ uptake (VO₂), CO₂ output (VCO₂), blood lactate concentration ([La]b) and Borg scale were measured during the exercise. From TD NIRS, muscles absolute values of absorption and scattering coefficients were obtained with a homogeneous approach and hemoglobin concentrations and saturation levels were calculated. The time courses of HHb, O₂Hb, tHb and SO₂ were consistent with previous literature results. A high inter-subject variability was found for both optical properties and hemodynamic concentrations. Further statistical group analysis will be required in order to highlight significant behavior within the population and correlation with physiological parameters.

Citation Download Citation

I. Pirovano, S. Porcelli, F. Azzarello, R. Re, L. Spinelli, D. Contini, M. Marzorati, and A. Torricelli "Preliminary vastus lateralis characterization with time domain near infrared spectroscopy during incremental cycle exercise", Proc. SPIE 11074, Diffuse Optical Spectroscopy and Imaging VII, 1107424 (11 July 2019); https://doi.org/10.1117/12.2527068

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available