A new study suggests that marathon training may be the best way to reduce heart problem risks in middle-aged men.

Researchers have found that 45 men, between 35 to 65 years of age who were preparing for a marathon, reduced their heart disease risk factors. These men were recreational runners who were planning to participate in the 2013 Boston Marathon. More than half of them had at least one heart risk factor like high cholesterol, high blood pressure, or family history.

The 18-week training program consisted of group runs, endurance training, and exercise tips, and coaching. The study will be presented during the annual meeting of the American College of Cardiology which will be held in Washington, D.C.

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