Stress takes a toll on the mind and the heart. It can impact heart function at a molecular level, triggering increased inflammation and “leading to the release of harmful molecules that contribute to ...

In TODAY.com's Expert Tip of the Day, a cardiologist explains why a lower resting heart rate can be a good sign of heart health and how to improve this vital sign. Resting heart rate — the number of ...

To live is to have a heartbeat, which is why it makes sense for us living things to have a good understanding of our ticker. It’s well-known science that our hearts beat faster when we exercise and ...

Taking easy runs too fast is a common habit among runners, much to the chagrin of coaches everywhere. I know staying in the zone 2 range is critical for aerobic development, and after lowering my ...

Get to know the link between your effort level and your heart rate. Plus, how to use heart rate to your performance advantage ...