• Adv Exp Med Biol · Jan 2013

    Tissue oxygenation during exercise measured with NIRS: reproducibility and influence of wavelengths.

    • Erwin Gerz, Dmitri Geraskin, Julia Franke, Petra Platen, André Steimers, and Matthias Kohl-Bareis.
    • RheinAhrCampus, University of Applied Sciences Koblenz, Remagen, Germany.
    • Adv Exp Med Biol. 2013 Jan 1; 789: 171-177.

    AbstractNear-infrared spectroscopy (NIRS) is widely used for the measurement of skeletal muscle oxygenation during exercise as it reflects muscle metabolism, and most studies report a large variability between subjects. Here we assess the data quality of tissue oxygen saturation (SO2) and oxygenated (oxyHb) and deoxygenated (deoxyHb) haemoglobin concentrations recorded during an incremental cycling protocol in nine healthy volunteers. The protocol was repeated three times on the same day and a fourth session on a different day to estimate the reproducibility of the method with a broadband, spatially resolved spectroscopy (SRS) system. We found that the inter-subject variation in SO2 (standard deviation ≈ 6 %) was considerably larger than the reproducibility (≈ 1.5 %) both for the same-day and different-day tests. The reproducibility of changes in SO2 was better than 1 %.

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