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Updated: Jun 5, 2026

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
Carotid and peripheral atherosclerosis in male marathon runners
Knut Kröger1, Nils Lehmann, Lisa Rappaport
1Clinic of Angiology, HELIOS Clinic Krefeld, Krefeld, Germany. knut.kroeger@helios-kliniken.de
Insights
Marathon runners show a high prevalence of extracoronary atherosclerosis, linked to cardiovascular risk factors and coronary artery disease. Peripheral artery remodeling is significant in those with more atherosclerosis, highlighting the need for awareness.
Area of Science:
- Cardiovascular Medicine
- Sports Cardiology
- Radiology
Background:
- Long-distance running, like marathon completion, is often associated with cardiovascular benefits.
- However, the impact of intense endurance exercise on subclinical atherosclerosis, particularly extracoronary plaque burden, remains an area of investigation.
Purpose of the Study:
- To assess the prevalence of atherosclerotic plaque in the carotid, abdominal, and lower limb arteries in male marathon runners.
- To investigate the association between extracoronary plaque burden, traditional cardiovascular risk factors, and coronary atherosclerosis.
Main Methods:
- 100 male marathon runners (aged 50-75) with recent extensive running history were studied.
- B-mode ultrasound was used to image plaque in peripheral arteries.
- Coronary artery calcium (CAC) scores were determined using electron beam computed tomography, alongside assessment of cardiovascular risk factors.
Main Results:
- A significant portion of runners exhibited carotid and peripheral artery plaque.
- Plaque presence correlated with older age and higher 10-year Framingham risk scores.
- Runners with high CAC scores showed evidence of atherosclerotic remodeling in peripheral arteries, with larger diameters but smaller lumens.
Conclusions:
- The prevalence of extracoronary atherosclerosis is notably high in male marathon runners.
- This atherosclerosis is associated with established cardiovascular risk factors and coronary plaque burden.
- Findings emphasize the importance of screening for atherosclerosis and cardiovascular risk factors in this athletic population.
Purpose:
We measured extracoronary atherosclerotic plaque burden and its association with cardiovascular risk factors and with coronary atherosclerosis in male marathon runners.
Methods:
We studied 100 male presumably healthy runners, aged 50-75 yr, who completed at least five marathons during the preceding 3 yr. Presence of plaque in the carotid, abdominal, and lower limb arteries was imaged using B-mode ultrasound. In all runners, traditional cardiovascular risk factors and the electron beam computed tomography-based coronary artery calcium (CAC) score were determined.
Results:
Ten runners were free from any plaque in the carotid or peripheral arteries. Runners with plaque were older (58±6 vs 54±5 yr, P=0.04), had a higher 10-yr Framingham risk score (7.2±3.8 vs 5.0±1.9, P=0.026), and tended to have a higher prevalence of CAC (76.7% vs 50.0%, P=0.07) compared with those without. Runners with CAC≥100 had larger peripheral artery diameters (aorta and iliac and common femoral arteries) but smaller lumen than runners with CAC<100, indicating atherosclerotic remodeling. A stepwise model selection process to predict CAC on the basis of age and peripheral atherosclerosis yielded a model as follows: log2(CAC+1)=0.181 age (yr)+0.435 maximum carotid plaque thickness (mm)-6.487, with a coefficient of determination of 22.8%. However, positive and negative predictive values were too low to predict CAC≥100 with sufficient accuracy.
Conclusions:
The prevalence of carotid and peripheral atherosclerosis in marathon runners is high and is related to cardiovascular risk factors and the coronary atherosclerotic burden. Remodeling of peripheral arteries is greatest in runners with the most evidence of atherosclerosis. These data support an increased awareness of atherosclerosis prevalence and cardiovascular risk factors in marathon runners.
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