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 ...

SVT results in the heart beating at much faster rate than normal, and can be triggered by exercise, lack of sleep, ...

That little number on your fitness tracker might be more important than you realize. Your resting heart rate isn’t just some random vital sign. It’s essentially a window into how efficiently your ...

Breathing is something we do unconsciously. But knowing when and how to take conscious deep breaths could unlock a host of benefits ...

You're curled up on the couch, finally relaxing after a long day when suddenly, your heart starts racing. You're obviously ...

Dr. Myerburg answers the question: 'How Do Pacemakers Know To Pace Faster?' — -- Question: How do pacemakers know when I need a faster heart rate, for example when I am exercising or anxious?

High-intensity interval training is important, but coming back to your breath can be crucial to helping you train.

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 ...