It’s a fact: Heart disease is the No. 1 cause of death of men and women in the United States, killing 1 million every year, according to the Heart Foundation. That means someone's dying from heart disease every 33 seconds. To protect your heart, you've probably heard thousand times that you should eat right, exercise, and control risk factors like high blood pressure and cholesterol. But do these things actually work at protecting your heart and health?
To find out, we explored the research and talked to Tim Church, M.D., M.P.H., Ph.D., Director of Preventive Medicine Research at Pennington Biomedical Research Center in Baton Rouge.
“The potential for prevention is huge for cardiovascular disease,” says Dr. Church. “The first rule is, ‘Don’t smoke.’ Smoking is a nuclear bomb.”
Got it! Now let’s look at the numbers and find out what really lowers your risk. >>
In this global study, adults over 50 who were at high risk of cardiovascular disease and diabetes who walked an additional 2,000 steps a day—about 20 minutes of brisk walking—reduced their risk of having a cardiovascular “event,” such as a heart attack or stroke, by 10 percent over the next six years.
“Other than not smoking, nothing comes close to physical activity for prevention,” says Dr. Church. “Hundreds, if not thousands, of papers support it.” Achieving the goal of being physically active for 150 minutes a week, including strength training a couple of days a week, can reduce your cardiovascular risk by about 25 percent, he says. “There’s a dose response, which means the more you exercise, the more you benefit.” The biggest benefit, though, comes from going from sedentary to mildly active, such as walking 10 minutes a day. Says Dr. Church, “The biggest bang is just getting off the couch.”
In a meta-analysis of 22 studies, British researchers found that people who ate seven more grams of dietary fiber had a nine percent lower risk of heart disease. How much is that? A medium apple has 5 grams of dietary fiber, as does a half cup of cooked broccoli. A half cup of cooked lentils: 8 grams. Fruits, vegetables, beans, nuts, and whole grains are all good sources of fiber. “Fiber has beneficial effects on blood glucose and cholesterol, and it may keep your gastrointestinal tract healthier, reducing inflammation,” says Dr. Church. “Eating more fiber is also a marker of a healthier diet.”
“It’s pretty powerful,” says Dr. Church. “Drinking in moderation cuts your risk of heart disease by about 25 percent.” That’s defined as no more than one daily drink for a woman, two for a man. Not everyone can drink moderately, of course, but if you can, research shows it’s heart healthy. “It relaxes your blood vessels, so you can’t form a clot while alcohol’s on board,” says Dr. Church. “Any alcohol has benefits, but wine has a little more,” says Dr. Church. The healthiest pattern: “A drink or two every couple of days.”
The Agency for Healthcare Research Quality, a federal research agency, recently concluded that simply taking a multivitamin/multimineral pill won’t reduce your risk of heart disease. “It’s no surprise,” says Dr. Church. After all, preventing heart disease isn’t what multis are built to do—they’re to shore up nutrient deficiencies. “While the evidence for heart disease prevention isn’t there,” says Dr. Church, “taking multis won’t hurt you.”
As for research that low vitamin D is associated with a 27 percent increased risk of developing heart disease, Dr. Church thinks it’s simply a marker for an inactive lifestyle, meaning since most people get their vitamin D from the sun, “people with high vitamin D levels are outside more—and probably more active,” he says. If you do have low D levels, Dr. Church supports taking supplements. But whether it will affect heart health isn’t fully clear.
What he does think makes a difference: Omega 3 fatty acids, found primarily in fatty fish such as salmon. The American Heart Association recommends that healthy adults eat at least two fish meals a week. But if you don’t, won’t, or can’t, you may want to consider a 1-gram Omega supplement that includes both EPA and DHA, two forms of Omega 3s found in fish. While the heart disease preventive benefits of taking Omega 3 supplements hasn’t been established, says Dr. Church, “there is a lot of strong epidemiological evidence for Omega 3s. I’m a big proponent — I believe there’s value there.”
This one has a catch—it’s about people who already have heart disease. A recent analysis found that in people with existing heart disease, getting the flu shot reduces the risk of cardiovascular events like a heart attack by 36 percent. “Getting the flu puts great stress on your body and increases the risk of having another heart attack,” says Dr. Church. A flu shot is a good idea for everyone—it’s not too late since flu peaks around the end of February, beginning of March!—and if you’re at high cardiovascular risk, or already have heart disease, that little jab could be a lifesaver.
A major Spanish study found that men and women aged 55 to 80 who ate a Mediterranean diet were 30 percent less likely to have a heart attack or stroke, or die from heart disease, over the next five years. The most protective elements: olive oil as the primary fat, moderate alcohol (mostly from wine), lots of fruits, vegetables, nuts, legumes, and fish, and low consumption of meat. Just this week, a new American study of firefighters from the Midwest who followed a Mediterranean-style diet had lower cardiovascular risk factors: less belly fat, lower “bad” LDL cholesterol, and higher “good” HDL cholesterol.
The great thing about Mediterranean studies is that they capture not just one healthy element but a pattern—a lifestyle. “We should look at risk factor clusters, and the Mediterranean lifestyle captures that,” says Dr. Church. Add the physical activity that’s part of a traditional Mediterranean lifestyle, and it’s really the big picture.
Talk about big picture. The Centers for Disease Control and Prevention recently estimated that if everyone didn’t smoke, ate a healthy diet, exercised regularly, achieved a healthy weight, and got regular checkups so they could control risk factors such as high blood pressure and elevated cholesterol levels, then death from heart disease would fall by 25 percent. That’s 200,000 lives saved – each year.
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