Healthy Lifestyle can Make a Huge Difference on Cardiovascular Health

A healthy lifestyle can make a huge difference on cardiovascular health, reveal two large studies from Northwestern Medicine.

"Health behaviors can trump a lot of your genetics," said Donald Lloyd-Jones, chair and professor of preventive medicine at Northwestern University Feinberg School of Medicine and a staff cardiologist at Northwestern Memorial Hospital.

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"This research shows people have control over their heart health. The earlier they start making healthy choices, the more likely they are to maintain a low-risk profile for heart disease."

The first Northwestern Medicine study investigated why most young adults, who have a low-risk profile for heart disease, often tip into the high-risk category by middle age with high blood pressure, high cholesterol and excess weight.

The unhealthy shift is the result of lifestyle, the study found. More than half of the young adults who followed the five healthy lifestyle factors for 20 years were able to maintain their low-risk profile for heart disease though middle age.

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There are big benefits to reaching middle age with a low-risk profile for heart disease. These individuals will live much longer, have a better quality of life and generate lower Medicare bills.

The study followed 2,336 black and white participants, ages 18 to 30 at baseline, for 20 years.

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Researchers tracked participants' diet, physical activity, alcohol consumption, smoking, weight, blood pressure and glucose levels at the baseline year, year seven and year 20. The participants are part of the CARDIA (Coronary Artery Risk Development in Young Adults) multi-center longitudinal study sponsored by the National Heart, Lung and Blood Institute.

After 20 years, the prevalence of a low-risk profile was 60 percent for participants who followed all five healthy lifestyle factors, 37 percent for four factors, 30 percent for three factors, 17 percent for two and 6 percent for one or zero. The results were similar for men only, women only, black only and white only.

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The second Northwestern Medicine study examined three generations of families from the Framingham Heart Study to determine the heritability of cardiovascular health. Heritability includes a combination of genetic factors and the effects of a shared environment such as the types of foods that are served in a family.

The study found that only a small proportion of cardiovascular health is passed from parent to child; instead, it appears that the majority of cardiovascular health is due to lifestyle and healthy behaviors.

"What you do and how you live is going to have a larger impact on whether you are in ideal cardiovascular health than your genes or how you were raised," said Norrina Allen, the lead study author and a postdoctoral fellow in preventive medicine at the Feinberg School.

The Northwestern Medicine study looked at three generations of families including 7,535 people at age 40 and a separate group of 8,920 people at age 50. The goal was to see who was in ideal cardiovascular health at these two critical periods in middle age.

Both Northwestern Medicine studies build on previous research from the department of preventive medicine that has provided the core for the national definition of cardiovascular health over the past decade, noted Lloyd-Jones.

The studies have been presented at the American Heart Association Scientific Sessions 2010 in Chicago.

Source-ANI