CHICAGO — Is cardiovascular health in middle age and beyond a gift from your genes or is it earned by a healthy lifestyle and within your control?Two large studies from Northwestern Medicine confirm a healthy lifestyle has the biggest impact on cardiovascular health. One study shows the majority of people who adopted healthy lifestyle behaviors in young adulthood maintained a low cardiovascular risk profile in middle age. The five most important healthy behaviors are not smoking, low or no alcohol intake, weight control, physical activity and a healthy diet.