When you exercise regularly your heart becomes stronger and more efficiently circulate blood. This means the heart doesn’t have to work so hard and it takes less force against your artery walls to circulate oxygenated blood through the body.
Being regularly active can reduce your systolic (top number) blood pressure by 5 to 10 mm Hg. However, don’t expect overnight results. It can take up to 3 months for regular exercise to impact blood pressure levels.