Who do you think would have more artery clogging in the heart: (A) a group of sedentary, overweight men; or (B) a group of men who are slightly older, much leaner, and have run at least one marathon annually for 25 years?
If you picked (A), you would be wrong, at least according to a new report in the March/April 2014 issue of Missouri Medicine. Its supporters believe the new study adds weight to the “excessive endurance exercise hypothesis,” which posits that too much exercise, like marathon training and racing, has negative effects on the heart.
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