Men develop a type of irregular heartbeat, known as atrial fibrillation, about a decade earlier than women on average, and being overweight is a major risk factor, according to a large new study published in the American Heart Association’s journal Circulation. In atrial fibrillation, the upper chambers of the heart, or atria, quiver instead of beat to move blood effectively.

Each year, nearly 900,000 Americans die prematurely from the five leading causes of death – yet 20 percent to 40 percent of the deaths from each cause could be prevented, according to a study from the Centers for Disease Control and Prevention (CDC).