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Proceedings Paper

Use of diffuse optical spectroscopy to monitor muscle and brain oxygenation dynamics during isometric and isokinetic exercise
Author(s): Goutham Ganesan; Joshua Cotter; Warren Reuland; Robert V. Warren; Soroush M. Mirzaei Zarandi; Albert E. Cerussi; Bruce J. Tromberg; Pietro Galassetti
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Paper Abstract

The use of near-infrared time-resolved spectroscopy (TRS-20, Hamamatsu Corporation) in two resistance type exercise applications in human subjects is described. First, using isometric flexion of the biceps, we compared the magnitude and relevance of tissue hemoglobin concentration and oxygen saturation (stO2) changes when assuming constant scattering versus continuous measurement of reduced scattering coefficients at three wavelengths. It was found that the assumption of constant scattering resulted in significant errors in hemoglobin concentration assessment during sustained isometric contractions. Secondly, we tested the effect of blood flow restriction (BFR) on oxygenation in a muscle (vastus medialis oblique, VMO) and in the prefrontal cortex (PFC) of the brain. The BFR training technique resulted in considerably more fatigability in subjects, and correlated with reduced muscle stO2 between sets of exertion. Additionally, exercise with BFR resulted in greater PFC deoxygenation than a condition with equivalent work performance but no BFR. These experiments demonstrate novel applications for diffuse optical spectroscopy in strength testing and targeted muscle rehabilitation.

Paper Details

Date Published: 25 March 2013
PDF: 10 pages
Proc. SPIE 8578, Optical Tomography and Spectroscopy of Tissue X, 857803 (25 March 2013); doi: 10.1117/12.2007459
Show Author Affiliations
Goutham Ganesan, Beckman Laser Institute and Medical Clinic (United States)
Univ. of California, Irvine School of Medicine (United States)
Joshua Cotter, Univ. of California, Irvine School of Medicine (United States)
Warren Reuland, Beckman Laser Institute and Medical Clinic (United States)
Robert V. Warren, Beckman Laser Institute and Medical Clinic (United States)
Soroush M. Mirzaei Zarandi, Beckman Laser Institute and Medical Clinic (United States)
Albert E. Cerussi, Univ. of California, Irvine School of Medicine (United States)
Bruce J. Tromberg, Beckman Laser Institute and Medical Clinic (United States)
Pietro Galassetti, Univ. of California, Irvine School of Medicine (United States)


Published in SPIE Proceedings Vol. 8578:
Optical Tomography and Spectroscopy of Tissue X
Bruce J. Tromberg; Arjun G. Yodh; Eva Marie Sevick-Muraca, Editor(s)

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