Decade-long marathon study finds heart remains resilient in recreational runners

A 10-year study of 152 recreational male marathon runners found that marathon-induced troponin T release after races was not linked to long-term changes in right ventricular function; left-ventricle changes occurred but stayed within normal limits, suggesting endurance training does not cause lasting right-heart damage in most recreational athletes, though the sample is small and one should consult a doctor if concerned.