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Do Two Tissue Blood Volume Parameters Measured by Different Near-Infrared Spectroscopy Methods Show the Same Dynamics During Incremental Running?

  • Takuya OsawaEmail author
  • Takuma Arimitsu
  • Hideyuki Takahashi
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 876)

Abstract

Both the change in total hemoglobin concentration (cHb), assessed by near-infrared continuous-wave spectroscopy (NIR-CWS), and the normalized tissue hemoglobin index (nTHI), assessed by NIR spatially resolved spectroscopy (NIR-SRS), were used to quantify changes in tissue blood volume. However, it is possible that these parameters may show different changes because of the different measurement systems. The present study aimed to compare changes in cHb and nTHI in working muscles, which were selected for measurement because the parameters changed dynamically. Methods: After a standing rest, seven male runners (age 24 ± 3 years, mean ± S.D.) performed an incremental running exercise test on a treadmill (inclination = 1 %) from 180 to 300 m min−1. During the tests, cHb and nTHI were monitored from the vastus lateralis (VL) and medial gastrocnemius (GM) muscles. These parameters were relatively evaluated from the minimal to maximal values through the test. Results: When the exercise began, cHb and nTHI quickly decreased and then gradually increased during running. In comparison with both VL and GM, there was significant interaction between cHb and nTHI. Conclusions: The present results suggest that cHb and nTHI in working muscles are not always synchronized, particularly at the onset of exercise and at high intensities. Although cHb was previously used as the change of tissue blood volume, it is implied that tissue blood volume assessed by cHb is overestimated.

Keywords

Near-infrared continuous wave spectroscopy Near-infrared spatially resolved spectroscopy Tissue blood volume Working muscle Running 

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Copyright information

© Springer Science+Business Media, New York 2016

Authors and Affiliations

  • Takuya Osawa
    • 1
    Email author
  • Takuma Arimitsu
    • 1
  • Hideyuki Takahashi
    • 1
  1. 1.Department of Sports ScienceJapan Institute of Sports SciencesTokyoJapan

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