Training for a Marathon Can Turn Back Aging Clock.

Among a group of 138 first-time marathon runners, researchers observed that after six months of training, participants experienced a 3- to 4-point drop in systolic and diastolic blood pressure, as well as a 9% improvement in aortic function. The research team estimates that training for a marathon reversed the effects of aging on the cardiovascular system by about four years.

Journal of the American College of Cardiology, January 2020