Where you live — even down to the specific neighborhood — might have an impact on your blood pressure, a new study led by a Northwestern University researcher suggests.

The study authors looked at data from 2,280 African-Americans whose health has been tracked for decades and discovered what they called a “powerful effect”: Those who moved out of highly segregated neighborhoods saw a drop in their blood pressure.

The correlation between less segregated areas and lower blood pressure is likely related to less stress and better access to exercise, medical care and healthier food, researchers say.