Exercise training in swine promotes growth of arteriolar bed and capillary angiogenesis in heart
University of California San Diego School of Medicine, La Jolla, California 92093-0612 Exercise training induces coronary vascular adaptations. The goal of this study was to contrast the effects of training on capillary and arteriolar growth. Minipigs were trained for 1, 3, 8, and 16 wk and compared...
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Published in | Journal of applied physiology (1985) Vol. 85; no. 3; pp. 1160 - 1168 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Bethesda, MD
Am Physiological Soc
01.09.1998
American Physiological Society |
Subjects | |
Online Access | Get full text |
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Summary: | University of California San Diego School of Medicine, La Jolla,
California 92093-0612
Exercise
training induces coronary vascular adaptations. The goal of this study
was to contrast the effects of training on capillary and arteriolar
growth. Minipigs were trained for 1, 3, 8, and 16 wk and compared with
controls. Maximal O 2 consumption increased continuously throughout the study. Capillary and arteriolar densities and diameters, and proliferation of vascular cells in these
vessels, were determined in perfusion-fixed tissue. The arterioles were
subdivided into five groups according to diameter: 10-19.9,
20-30, 31-40, 41-70, and 71-120 µm. The total
vascular bed cross-sectional area increased by 37% at 16 wk, mainly
because of an increase in the number of the small arterioles and an
increase in the diameter of the larger vessels. Capillary density
increased at 3 wk and then returned to control levels by 16 wk;
concomitantly, the number of arterioles (20-30 µm) increased at
16 wk. We speculate that the "extra" capillaries observed at 3 wk
were the source of the new arterioles.
endothelial cells; vascular cell proliferation; vascular
adaptations; blood vessel growth |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 8750-7587 1522-1601 |
DOI: | 10.1152/jappl.1998.85.3.1160 |