High-Intensity Intervals Boost Vascular Health More Than Cardio

Most people think about cardio in terms of calories, endurance, or heart rate zones. You go for a run, take a cycling class, spend 45 minutes on the elliptical, and assume your heart is getting what it needs. And to some extent, it is. But there’s another part of cardiovascular health that rarely enters the conversation: the health of your blood vessels themselves.