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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

Published on: February 7, 2015

Aerobic Capacity and Postprandial Flow Mediated Dilation.

Kevin D Ballard¹, James J Miller², James H Robinson¹

¹Department of Health and Sport Sciences, University of Louisville, Louisville, KY, USA.

International Journal of Exercise Science

|May 17, 2016

Summary

High-fat meals temporarily impair vascular function in both highly trained and moderately active men. Greater aerobic capacity does not prevent this post-meal vascular dysfunction. This highlights the impact of diet on cardiovascular health.

Keywords:

Endothelial function aerobic exercise athletes high-fat meal insulin lipids reactive hyperemia ultrasound

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Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research

Published on: October 22, 2014

Area of Science:

Cardiovascular Physiology
Exercise Science
Nutritional Science

Background:

High-fat meals can induce temporary vascular dysfunction.
Aerobic exercise is known to improve vascular function in healthy individuals.
The impact of varying aerobic capacity on vascular response to high-fat meals is not well understood.

Purpose of the Study:

To investigate whether different levels of aerobic capacity influence vascular function after a high-fat meal.
To compare flow-mediated dilation (FMD) in highly trained versus moderately active young males post-high-fat meal.

Main Methods:

Participants: 10 highly trained (VO2max ~74.6 ml·kg·min⁻¹) and 10 moderately active (VO2max ~47.3 ml·kg·min⁻¹) young males.
Intervention: Ingestion of a high-fat meal.
Measurements: Brachial artery flow-mediated dilation (FMD) assessed pre-meal and 2 and 4 hours postprandially. Blood markers (triglycerides, insulin, LDL-C, HDL-C, glucose) were also measured.

Main Results:

Flow-mediated dilation (endothelium-dependent vasodilation) was significantly reduced at 2 and 4 hours post-meal in both groups compared to baseline.
No significant difference in FMD reduction was observed between the highly trained and moderately active groups.
Metabolic markers including triglycerides, insulin, and glucose increased post-meal, while HDL-C decreased in both groups.

Conclusions:

A single high-fat meal causes transient impairment of vascular function, irrespective of aerobic capacity level.
High aerobic capacity does not offer protection against the acute vascular effects of a high-fat meal in young males.
Dietary intake significantly impacts acute vascular health, underscoring the need for nutritional considerations alongside exercise.