Micro-fluctuations in the time between heartbeats are proving a helpful indicator of mental health, stress levels, exercise ...

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 ...

Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric ...

Heart Rate Variability (HRV) might be the most accessible—and powerful—predictor of cardiovascular and nervous system health that you are probably not measuring. Today’s letter is dedicated to ...

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 ...

Your smartwatch may track HRV automatically, but age plays a major role in what counts as a healthy score ...

Did you know there’s a number that might let you know how stressed you are, whether you have a cold coming on and how to get into the zone if you’re about to present at a big meeting? You can find ...

Influencer Lucie Fink talks about using Heart Rate Variability to track her COVID journey. Honestly, for most healthy people, the answer is probably no: While it doesn't necessarily hurt, it also ...