Endurance Training Linked to Heart Rhythm Risks for Men Over 50

New research from the University of Leeds has revealed that male endurance athletes over the age of 50 may be at an elevated risk for dangerous heart rhythm disturbances during or after exercise. The findings indicate that long-term, high-intensity exercise, while generally beneficial, can pose significant health risks for a subset of older athletes.

The study, published in the European Journal of Preventive Cardiology, monitored 106 healthy male runners and cyclists using wearable activity trackers and implantable heart monitors. It found that approximately one in four participants experienced episodes of ventricular tachycardia, a rapid heart rhythm that can become life-threatening if it persists. Notably, three out of four athletes who experienced these episodes showed signs of myocardial scarring.

In an important clarification, lead author Wasim Javed noted, “Our study shows that exercise was only associated with a risk of developing abnormal heart rhythms in those who were already high risk due to heart scarring.” This highlights the complexity of exercise-related risks, particularly for older athletes who may have underlying heart conditions.

Research indicates that about 90% of exercise-related sudden cardiac deaths occur in men over 40, often without any prior warning signs. Despite these alarming statistics, organizations like the American Heart Association emphasize the benefits of regular physical activity, recommending as little as 30 minutes most days to significantly lower the risk of cardiovascular disease and stroke. Cardiologists at the Cleveland Clinic also advocate for exercise as a means to strengthen the heart and enhance overall cardiovascular health.

While the study underscores potential risks for a small group of older athletes, it also reaffirms that exercise remains overwhelmingly beneficial for the general population. “Athletes who developed abnormal heart rhythms were not exercising more or harder than athletes without abnormal heart rhythms,” Javed explained. This suggests that the exercise itself is not the root cause but may act as a trigger for dangerous heart rhythms in individuals with pre-existing heart issues.

Researchers recommend that older male athletes, especially those with extensive competitive histories, should undergo regular cardiovascular screenings. They should also discuss any symptoms, such as unexplained dizziness, palpitations, or breathlessness, with their healthcare providers. The use of wearable heart-monitoring devices could facilitate early detection of irregular heart rhythms, providing an added layer of safety.

“Exercise is safe and has immense benefits — but athletes in this group should have regular health checks to make sure they stay healthy,” Javed concluded. This advice serves as a reminder that while endurance training can be a vital component of health and fitness, awareness and proactive health management are crucial for older athletes.