Here’s what this health metric really indicates, according to cardiologists.

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 ...

Fitness trackers and smart watches are widely popular wearable devices that measure several types of health metrics, including step count, calories burned, sleep quality, Vo2 max and heart rate. As a ...

Heart rate variability isn’t just for elite cyclists—find out how tracking HRV can benefit every rider’s training, recovery, ...

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, ...

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...

It’s been known for decades that heart rate variability (HRV) during labor signals how a fetus is responding to stress. Lower HRV—a lower variation in heartbeats—is even a risk factor for sudden ...

Ever check your smartwatch or Oura ring and notice your resting heart rate is higher than you expect? You do your best to ...

Researchers found that while the menstrual cycle changes heart rate variability (HRV), it does not significantly affect ...