When most of us decide to get serious about getting in shape or taking care of our health, our heart health comes to mind. After all, our heart is central to our well-being, working like an engine to make sure our body gets the oxygen and nutrients it needs to function properly. While we know how important our heart is, knowing what is going on inside our body’s hardest-working muscle hasn’t always been easy….

Check out the original article: [Slashgear]Every Apple Watch Heart Health Feature (And What They Do)