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Journal of Biomedical Optics

Reliability of near-infrared spectroscopy for measuring biceps brachii oxygenation during sustained and repeated isometric contractions
Author(s): Makii Muthalib; Guillaume Y. Millet; Valentina Quaresima; Kazunori Nosaka
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Paper Abstract

We examine the test-retest reliability of biceps brachii tissue oxygenation index (TOI) parameters measured by near-infrared spectroscopy during a 10-s sustained and a 30-repeated (1-s contraction, 1-s relaxation) isometric contraction task at 30% of maximal voluntary contraction (30% MVC) and maximal (100% MVC) intensities. Eight healthy men (23 to 33 yr) were tested on three sessions separated by 3 h and 24 h, and the within-subject reliability of torque and each TOI parameter were determined by Bland-Altman±2 SD limits of agreement plots and coefficient of variation (CV). No significant (P>0.05) differences between the three sessions were found for mean values of torque and TOI parameters during the sustained and repeated tasks at both contraction intensities. All TOI parameters were within±2 SD limits of agreement. The CVs for torque integral were similar between the sustained and repeated task at both intensities (4 to 7%); however, the CVs for TOI parameters during the sustained and repeated task were lower for 100% MVC (7 to 11%) than for 30% MVC (22 to 36%). It is concluded that the reliability of the biceps brachii NIRS parameters during both sustained and repeated isometric contraction tasks is acceptable.

Paper Details

Date Published: 1 January 2010
PDF: 8 pages
J. Biomed. Opt. 15(1) 017008 doi: 10.1117/1.3309746
Published in: Journal of Biomedical Optics Volume 15, Issue 1
Show Author Affiliations
Makii Muthalib, Edith Cowan Univ. (Australia)
Guillaume Y. Millet, Edith Cowan Univ. (Australia)
Valentina Quaresima, Univ. degli Studi dell'Aquila (Italy)
Kazunori Nosaka, Edith Cowan Univ. (Australia)

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