The heart must beat continuously to maintain life from the moment it first exists. That's a massive job, and a lot of things, like food and air quality, can have an impact on it. Heart disease is the leading cause of adult death worldwide, which is not surprising. By sleeping on your left side, you can reduce your risk and make it easier on your heart. Although it may seem insignificant, sleeping on your left side allows gravity to assist the heart in pumping blood. Your aorta begins its journey from the heart to the rest of your body by bending to the left. The heart works less hard to pump blood when you are lying with your head down.
