high-intensity workouts, reduce their risk of heart disease by 100 percent

Back in the late 1960s, Dr. Kenneth Cooper published
Aerobics as the “perfect” way to “train” your heart and
boost your aerobic conditioning. He thought that medium
intensity aerobic exercise practiced three or four times a
week was all you needed for health and longevity.
Yet this theory was never really proven and recently
the pieces are crumbling under the weight of mounting
evidence to the contrary. For instance, a recent study
by Harvard researchers shows that those who do shortduration,
high-intensity workouts, reduce their risk of
heart disease by 100 percent more than those who practice
aerobic exercise.