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Proceedings Paper

Using broadband spatially resolved NIRS to assess muscle oxygenation during altered running protocols
Author(s): Georg Koukourakis; Maria Vafiadou; André Steimers; Dmitri Geraskin; Patrick Neary; Matthias Kohl-Bareis
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Paper Abstract

We used spatially resolved near-infrared spectroscopy (SRS-NIRS) to assess calf and thigh muscle oxygenation during running on a motor-driven treadmill. Two protocols were used: An incremental speed protocol (velocity = 6 - 12 km/h, ▵v = 2 km/h) was performed in 3 minute stages, while a pacing paradigm modulated step frequency alternatively (2.3 Hz [SLow]; 3.3 Hz [SHigh]) during a constant velocity for 2 minutes each. A SRS-NIRS broadband system (600 - 1000 nm) was used to measure total haemoglobin concentration and oxygen saturation (SO2). An accelerometer was placed on the hip joints to measure limb acceleration through the experiment. The data showed that the calf (SO2 58 to 42%) desaturated to a significantly lower level than the thigh (61 to 54%). During the pacing protocol, SO2 was significantly different between the SLow vs. SHigh trials. Additionally, physiological data as measured by spirometry were different between the SLow vs. SHigh pacing trials (VO2 (2563± 586 vs. 2503 ± 605 mL/min). Significant differences in VO2 at the same workload (speed) indicate alterations in mechanical efficiency. These data suggest that SRS broadband NIRS can be used to discern small changes in muscle oxygenation, making this device useful for metabolic exercise studies in addition to spirometry and movement monitoring by accelerometers.

Paper Details

Date Published: 7 July 2009
PDF: 6 pages
Proc. SPIE 7368, Clinical and Biomedical Spectroscopy, 736814 (7 July 2009); doi: 10.1117/12.831626
Show Author Affiliations
Georg Koukourakis, Univ. of Applied Sciences Koblenz (Germany)
Maria Vafiadou, Univ. of Applied Sciences Koblenz (Germany)
André Steimers, Univ. of Applied Sciences Koblenz (Germany)
Dmitri Geraskin, Univ. of Applied Sciences Koblenz (Germany)
Patrick Neary, Univ. of Regina (Canada)
Matthias Kohl-Bareis, Univ. of Applied Sciences Koblenz (Germany)

Published in SPIE Proceedings Vol. 7368:
Clinical and Biomedical Spectroscopy
Irene Georgakoudi; Jürgen Popp; Katarina Svanberg, Editor(s)

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