But researchers have found that the “night owl” lifestyle comes at a cost that outweighs the risk of fatigue. ABC News reported that a study from the Journal of the American Heart Association found that “night owls” have an increased risk of heart attack and stroke — a crucial warning for Black Americans, who are at a higher risk for both. Researchers looked at factors including diet, physical activity, nicotine exposure, blood pressure and blood sugar. Prioritizing sleep, managing blood pressure and blood sugar, eating balanced meals, exercising regularly and avoiding tobacco can make a real difference. While the “night owl” rhythm may be your natural groove, the habits that come with it add up.