What is heart rate variability (HRV)? As popular as the metaphor may be, a healthy heart doesn’t beat as regularly as a metronome. In fact, it changes its rhythm with each beat. Heart rate variability ...

Heart disease continues to stand as the No. 1 cause of death in the United States. Coronary heart disease, the most common type of heart disease in the U.S., was responsible for the deaths of nearly ...

Thanks to the proliferation of smartwatches and fitness trackers, it’s never been easier to log your heart rate while running: Simply don the device (watch, monitor, or other wearable), start your ...

PRINTED ON TREADMILLS and exercise bikes in gyms around the world is a simple method for estimating the maximum rate at which your heart should safely beat, in beats per minute: 220 minus your age.

When heart cancer does happen, it can be particularly serious. Olga Pankova/Moment via Getty Images You probably know someone who is affected by cancer. This disease results when cells divide ...

In an age where nearly everyone wants to measure and optimize their health, wearable devices have become a part of everyday life. Many people now use fitness trackers to count their steps, ...