What's Your Heart Age? Take This Test to Find Out

U.K. health organizations have developed an online heart age calculator, warning that millions of people could unknowingly be at risk for a heart attack or stroke.

The Heart Age Test, a collaboration between the National Health Service, Public Health England, University College London and the British Health Foundation, can indicate whether a person's cardiovascular health is dangerously poor for his or her chronological age.

The online tool, which Public Health England unveiled on September 4, asks users 16 questions about their physical health and lifestyle choices, and uses this information to estimate their risk of a heart attack or stroke by a certain age.

It also offers tips on how to cut the risk of cardiovascular disease. These include losing weight, ditching cigarettes, as well exercising regularly and reducing alcohol intake.

Being physically active for at least 30 minutes every day of the week can cut the risk of heart attack and stroke, as can eating at least five servings of fruit and vegetables a day and not consuming more than one teaspoon of salt per day, according to the World Health Organization. Almost all Americans eat more than the daily recommended amount of sodium, according to the U.S. Food and Drug Administration.

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Around 610,000 people die of heart disease in the U.S. each year, according to the Centers for Disease Control and Prevention. Getty Images

The test has already been taken over 1.9 million times. Of the total users, 78 percent learned their biological heart age was higher than their chronological age. As many as 14 percent had a heart age at least 10 years "older" than their actual age.

Across the world, some 17.7 million people die from cardiovascular disease each year. And heart problems are to blame for 31 percent of deaths worldwide. Eighty percent of deaths are due to heart attacks and strokes, according to the World Health Organization.

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In the U.S., heart disease is the leading cause of death in men and women. Each year, around 735,000 people in the U.S. have a heart attack, and about 610,000 die from cardiovascular disease, accounting for one in every four deaths, according to the Centers for Disease Control and Prevention.

Professor Jamie Waterall, national lead for cardiovascular disease at Public Health England, said in a statement: "Millions are at risk of cardiovascular disease but don't know it, putting themselves at real risk of suffering ill-health or dying younger.

"Knowing your heart age is a simple way of finding out whether you're at risk of a heart attack or stroke. By making important lifestyle changes you can reduce your risk before it's too late.

"Taking a Heart Age Test is something you can easily do at home, but it could be one of the most important things you do to help you live a healthy longer life."

Take the "What's your heart age?" test here