Cited by 75Cardiovascular and exercise physiologyNitric Oxide and Endothelin EffectsCardiovascular Health and Disease Prevention

Effects of exercise training on regulation of tone in coronary arteries and arterioles

PARKER, JANET L., OLTMAN, CHRISTINE L., MULLER, JUDY M., MYERS, PAUL R., ADAMS, H. RICHARD, LAUGHLIN, M. HAROLD·1994·Medicine & Science in Sports & Exercise

Abstract

A large number of studies now support the concept that exercise training alters functional control of the coronary circulation. Recent work has approached this area using ex vivo coronary arterial preparations (proximal coronary arteries, near-resistance arteries, resistance arterioles) isolated from exercise-trained animals and contracting independently of confounding in vivo influences. The combined results of these studies indicate that training-induced alterations in vascular control mechanisms do not occur uniformly throughout the coronary vascular tree. Proximal epicardial coronary arteries (approximately 2.0 mm diameter) isolated from exercise-trained pigs exhibited significantly reduced contractile responsiveness to the alpha-adrenergic receptor agonist, norepinephrine, but unaltered contractile responsiveness to K+, acetylcholine, and endothelin. Also, proximal arteries from exercise-trained animals demonstrated enhanced sensitivity to the vasodilator effects of adenosine. At the other end of the vascular spectrum, in resistance arterioles (< 150 microns diameter) the relaxation responses to adenosine were unaffected by exercise training, but bradykinin-induced vasodilation (endothelium-dependent) was significantly enhanced. In near-resistance arteries (150-240 microns diameter) responses to both bradykinin and adenosine were enhanced by exercise training. Thus, exercise training is associated with intrinsic vessel size-dependent alterations in coronary smooth muscle…

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Crossref · 10.1249/00005768-199410000-00012

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Authors
PARKER, J. L., OLTMAN, C. L., MULLER, J. M., MYERS, P. R., ADAMS, H. R., & LAUGHLIN, M. H.
Affiliations
University of Missouri (US)
Venue
Medicine & Science in Sports & Exercise
Published
1994-10
Volume
26
Issue
10
Pages
1252???1261
ISSN
0195-9131 (ISSN-L)
OpenAlex
W2053691388
Cited by
75
References
0
Citations by year
2026: 1 · 2024: 1 · 2023: 4 · 2022: 1 · 2021: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 1 · 2012: 2
FWCI
6.18
Type
journal article
Language
en
Open access
closed
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01hl036079-05, 5r01hl036531-07, 5r01hl047812-03)
  • National Heart, Lung, and Blood Institute (HL-36531, HL-47812, HL 36079)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
exercise training, coronary circulation, coronary arteries, resistance arterioles, vascular tone regulation, norepinephrine responsiveness, adenosine vasodilation, bradykinin, endothelium-dependent relaxation, smooth muscle contractility
MeSH terms
Animals, Arteries, Arterioles, Coronary Circulation, Coronary Vessels, Endothelium, Vascular, Muscle, Smooth, Vascular, Physical Conditioning, Animal, Swine, Swine, Miniature, Vascular Resistance, Vasoconstriction, Vasodilation

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