Document Detail

Active muscle oxygenation dynamics measured during high-intensity exercise by using two near-infrared spectroscopy methods.
MedLine Citation:
PMID:  20204796     Owner:  NLM     Status:  MEDLINE    
Near-infrared spectroscopy is a noninvasive optical technique used to monitor tissue oxygenation. Generally, the modified Beer-Lambert's law (MBL) using continuous-wave light has been used to measure active muscle oxygenation during exercise; however, it cannot measure absolute changes in the oxy- (oxy-[Hb + Mb]), deoxy- (deoxy-[Hb + Mb]), and total hemoglobin/myoglobin concentrations (total-[Hb + Mb]) because the pathlength and scattering coefficient are not measured. In contrast, the time-resolved spectroscopy (TRS) using a ultra short pulsed laser can be used to determine absolute changes in the concentration, although the temporal resolution is inferior to that in MBL. This study evaluated the absolute changes in active muscle oxygenation and the optical mean pathlength and scattering and absorption coefficient during high-intensity exercise by using the TRS system. In addition, the difference between the changes determined using TRS and MBL measurements was assessed. When the TRS and MBL measurements obtained during high-intensity exercise were compared, the total-[Hb + Mb] and oxy-[Hb + Mb] dynamics differed markedly during high-intensity exercise, while the deoxy-[Hb + Mb] dynamics and kinetics did not differ.
Tadashi Saitoh; Anna Ooue; Narihiko Kondo; Kyuichi Niizeki; Shunsaku Koga
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Advances in experimental medicine and biology     Volume:  662     ISSN:  0065-2598     ISO Abbreviation:  Adv. Exp. Med. Biol.     Publication Date:  2010  
Date Detail:
Created Date:  2010-03-05     Completed Date:  2010-03-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0121103     Medline TA:  Adv Exp Med Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  225-30     Citation Subset:  IM    
Department of Bio-System Engineering,Graduate School of Science and Engineering, Yamagata University, 992-0038 Yonezawa, Japan.
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MeSH Terms
Exercise / physiology*
Hemoglobins / metabolism
Muscles / metabolism*
Myoglobin / metabolism
Oxygen / metabolism*
Scattering, Radiation
Spectroscopy, Near-Infrared / methods*
Young Adult
Reg. No./Substance:
0/Hemoglobins; 0/Myoglobin; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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