After following 1,000 healthy joggers and 4,000 healthy non-joggers for a decade, researchers claim that those who jog 1-2.4 hours per week were 71% less likely to die during the study period than non-joggers. However, they found no mortality benefits when comparing more strenuous joggers to the non-joggers in the study. Study researcher Dr. Jacob Marott adds, “We believe that long-term strenuous endurance exercise may induce pathological structural remodeling of the heart and large arteries.”
Journal of the American College of Cardiology, February 2015