Document Detail


Regional differences in blood flow and oxygen consumption in resting muscle and their relationship during recovery from exhaustive exercise.
MedLine Citation:
PMID:  12871962     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This investigation evaluated regional differences in blood flow and oxygen consumption and their relationship in exercised muscle during recovery from exhaustive exercise. Five healthy men performed exhaustive one-legged cycling exercise. Positron emission tomography was used to measure blood flow, oxygen uptake, and oxygen extraction in the quadriceps femoris muscle before and after exercise. Regions of interest included five areas of the muscle (two proximal, one central, and two distal), which were evenly spaced across the muscle. Before exercise, blood flow and oxygen consumption decreased significantly (P < 0.05) in the direction from the proximal to the distal portions; blood flow declined from 2.0 +/- 0.5 to 1.4 +/- 0.3 ml x 100 g-1 x min-1, and oxygen consumption decreased from 0.21 +/- 0.04 to 0.17 +/- 0.02 ml.100 g-1x min-1. In contrast, these gradients in blood flow and oxygen consumption diminished during recovery after exercise. Consequently, there was a positive relationship between changes in blood flow and oxygen consumption in an exercised muscle during recovery after exercise (r = 0.963, P < 0.01). These changes became larger in the direction from proximal to distal portions: blood flow increased from 2.9 +/- 0.7 to 3.9 +/- 0.8 and oxygen consumption from 1.4 +/- 0.1 to 1.8 +/- 0.4 times resting values. These results suggest that hemodynamic variables are heterogeneous within a muscle both at rest and during recovery from exercise and that there is a systematic difference in these variables in the direction from proximal to distal regions within the quadriceps femoris muscle.
Authors:
Masaki Mizuno; Yuichi Kimura; Takashi Iwakawa; Keiichi Oda; Kenji Ishii; Kiichi Ishiwata; Yoshio Nakamura; Isao Muraoka
Publication Detail:
Type:  Clinical Trial; Journal Article     Date:  2003-07-18
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  95     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-11-05     Completed Date:  2004-07-06     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2204-10     Citation Subset:  IM    
Affiliation:
Graduate School of Human Sciences, Waseda University, Saitama, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adult
Algorithms
Bicycling / physiology
Blood Pressure / physiology
Blood Volume / physiology
Exercise / physiology*
Heart Rate / physiology
Humans
Male
Muscle, Skeletal / blood supply,  physiology*,  radionuclide imaging
Oxygen Consumption / physiology*
Regional Blood Flow / physiology
Rest / physiology*
Tomography, Emission-Computed
Comments/Corrections
Comment In:
J Appl Physiol (1985). 2003 Dec;95(6):2202-3   [PMID:  14600161 ]

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


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