Whoever we are, whatever we’re doing, we have a measurable heart rate. It’s a pretty clear sign of being alive. But what should your heart rate be when exercising? When we exercise, our heart rate ...

Your heart rate can tell you a lot about your fitness and cardiovascular health. Your heart beats consistently, day in and day out, but you may not generally pay close attention to it. You might take ...

Many data-driven runners have a grasp on common heart rate metrics, like resting heart rate, maximum heart rate and heart rate zones. But there’s another, often undervalued data point worth keeping ...