Intense workouts, races may be dangerous for middle-aged men.

In a 1,500-word article, Bloomberg News (6/21, Khan, Pettypiece) reports that “as the average age of competitors in endurance sports rises, a spate of deaths during races or intense workouts highlights the risks of excessive strain on the heart through vigorous exercise in middle age.” Although the “benefits of exercise are well-known, researchers now suspect that there may be a point at which exertion becomes dangerous, especially for middle aged men.”