The assumption that more exercise always means a healthier heart is facing its most authoritative challenge yet. A joint consensus statement from two of cardiology's most influential bodies — the European Association of Preventive Cardiology and the American College of Cardiology — formally acknowledges that decades of intense endurance training may paradoxically elevate the risk of specific structural and electrical cardiac abnormalities in older competitive athletes, a population whose numbers have grown enormously over the past two decades.
The consensus document systematically addresses seven distinct cardiovascular conditions observed at elevated prevalence among Masters athletes — defined broadly as competitive exercisers over age 35. These include atrial fibrillation, bradyarrhythmias, ventricular arrhythmias, coronary atherosclerosis, aortic root dilatation, myocardial fibrosis, and a newly recognized entity termed exercise-induced arrhythmogenic cardiomyopathy. A critical thread running through the document is that current clinical guidelines for these conditions were developed largely from data on symptomatic, sedentary patients — making their direct application to highly conditioned older athletes potentially misleading or even harmful.
This statement carries outsized significance for sports medicine and preventive cardiology. Myocardial fibrosis and coronary atherosclerosis in lifelong endurance athletes have been documented in imaging studies over the past decade, but clinical guidance on how to interpret and manage these findings in otherwise asymptomatic high-performers has been fragmented. The consensus also confronts practical modern challenges: consumer wearable devices are now generating continuous cardiac data streams in this population, creating new diagnostic dilemmas. Key limitations remain — much underlying evidence is observational, sex and ethnic diversity in Masters athlete cohorts is limited, and dose-response thresholds separating beneficial from potentially harmful training volumes are not yet established. Nonetheless, this represents a potentially paradigm-shifting document for clinicians managing the growing wave of older competitive athletes.
