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        In the article entitled, “Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise” published in the June 2012 issue of Mayo Clinic Proceedings (Mayo Clin Proc. 2012;87(6):587-595), reference 7 should have read as follows: 7. Lee DC, Pate RR, Lavie CJ, Blair SN. Running and all-cause mortality risk—is more better? Med Sci Sports Exerc 2012;44(5):S699.

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        • Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise
          Mayo Clinic ProceedingsVol. 87Issue 6
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            A routine of regular exercise is highly effective for prevention and treatment of many common chronic diseases and improves cardiovascular (CV) health and longevity. However, long-term excessive endurance exercise may induce pathologic structural remodeling of the heart and large arteries. Emerging data suggest that chronic training for and competing in extreme endurance events such as marathons, ultramarathons, ironman distance triathlons, and very long distance bicycle races, can cause transient acute volume overload of the atria and right ventricle, with transient reductions in right ventricular ejection fraction and elevations of cardiac biomarkers, all of which return to normal within 1 week.
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