| Enhancing effect of cerebral blood volume by mild exercise in healthy young men: a near-infrared spectroscopy study. | |
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MedLine Citation:
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PMID: 18468709 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A mechanism by which exercise improves brain function may be attributed to increase in cerebral blood volume (CBV) with physical activity. However, the exact exercise intensity that influences CBV is still uncertain. To clarify this issue, 10 healthy young male participants were asked to perform a graded cycling exercise to the point of exhaustion while their prefrontal cortex CBVs are being monitored using near-infrared spectroscopy. Overall responsive cerebral oxygenation showed a non-linear pattern with three distinct phases. The CBV-threshold (CBVT), an event where rapid oxygenation takes place, occurred at approximately 42% of the V O2max. The CBVT preceded the lactate threshold (LT), which was at approximately 55% of the V O2max. The V O2max was not predictive of the CBVT in among the subjects. Our results indicate that oxygenation of the prefrontal cortex increases during graded cycling even at exercise intensities below the LT, suggesting the potential role of mild exercise in enhancing CBV. |
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Authors:
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Akkaranee Timinkul; Morimasa Kato; Takenori Omori; Custer C Deocaris; Akira Ito; Tomohiro Kizuka; Yosuke Sakairi; Takeshi Nishijima; Takashi Asada; Hideaki Soya |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-04-09 |
Journal Detail:
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Title: Neuroscience research Volume: 61 ISSN: 0168-0102 ISO Abbreviation: Neurosci. Res. Publication Date: 2008 Jul |
Date Detail:
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Created Date: 2008-05-27 Completed Date: 2008-09-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8500749 Medline TA: Neurosci Res Country: Ireland |
Other Details:
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Languages: eng Pagination: 242-8 Citation Subset: IM |
Affiliation:
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Laboratory of Exercise Biochemistry, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8574, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anaerobic Threshold / physiology Blood Volume / physiology* Cerebrovascular Circulation / physiology* Exercise / physiology* Heart Rate / physiology Humans Lactic Acid / blood Male Oxygen Consumption / physiology Oxyhemoglobins / metabolism Spectroscopy, Near-Infrared* |
| Chemical | |
Reg. No./Substance:
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0/Oxyhemoglobins; 50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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