Endurance athletes often show more coronary plaque despite cardiovascular benefits. This paradox challenges assumptions about running's heart health impact. Plaque presence doesn't negate the heart's improved performance with training.

Research shows athletes maintain larger stroke volumes, aiding performance. However, coronary arteries may still contain plaque. Plaque composition varies, with some forms potentially more stable. Yet, reassurances about harmless plaque in athletes are oversimplified. Read more culture coverage.

Studies indicate lifelong athletes have higher plaque odds. Plaque burden remains low, and vulnerable plaques are rare. However, plaque presence doesn't guarantee heart attacks. The relationship between training and plaque progression is complex and not fully understood. Related: NYC Marathon Medal Offers Freebies and Discounts for Runners.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.