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Related Experiment Videos

Exercise training-induced adaptations in the coronary circulation

M H Laughlin1, C L Oltman, D K Bowles

  • 1Department of Veterinary Biomedical Sciences, Dalton Cardiovascular Research Center, University of Missouri, Columbia 65211, USA.

Medicine and Science in Sports and Exercise
|April 4, 1998
PubMed
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Aerobic exercise enhances coronary blood flow by altering vascular resistance control. These adaptations vary spatially and by vessel type, impacting endothelial and smooth muscle cells for cardiovascular adaptation.

Area of Science:

  • Cardiovascular Physiology
  • Exercise Science
  • Vascular Biology

Background:

  • Aerobic exercise training increases coronary blood flow capacity.
  • Control of coronary vascular resistance involves multiple systems (metabolic, myogenic, endothelium-mediated, neurohumoral).
  • These control systems act in parallel and vary in importance across the coronary arterial tree.

Purpose of the Study:

  • To examine exercise training-induced adaptations throughout the coronary arterial tree.
  • To understand the spatial distribution of these adaptations.
  • To investigate the role of endothelium-mediated control and vascular smooth muscle responses.

Main Methods:

  • Analysis of adaptations in endothelium-mediated control.
  • Investigation of vascular smooth muscle responses to vasoactive agents.

Related Experiment Videos

  • Assessment of cellular-molecular control of intracellular Ca2+.
  • Evaluation of myogenic reactivity and adenosine sensitivity in different coronary artery segments.

    • Main Results:

    • Exercise training-induced adaptations are spatially nonuniform throughout the coronary tree.
    • Endothelium-mediated control adaptations differ between large coronary arteries and the microcirculation.
    • Vascular smooth muscle responses and intracellular Ca2+ control are altered by training.
    • Adenosine sensitivity increases in conduit and large resistance arteries but not small resistance arteries post-training.

    Conclusions:

    • Chronic exercise alters the phenotype of coronary endothelial and vascular smooth muscle cells.
    • Plasticity of these cells contributes to cardiovascular adaptation during exercise training.
    • Understanding these nonuniform adaptations is crucial for comprehending exercise's cardiovascular benefits.