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 rate variability has become one of the more curious metrics to emerge from the age of wrist-worn running trackers that, ...

Physiology meets bedtime: Lower heart rate variability, tied to reduced stress adaptability, is linked to greater bedtime procrastination. How study was done: Researchers measured HRV in 135 adults ...

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

Thanks to wearable devices, you can use all sorts of metrics to keep track of your health. You can check your weight, blood pressure, the number of steps you take, heart rate and more as you go about ...

HRV powers modern smartwatch “recovery scores,” but experts warn most users misinterpret what it actually measures about ...

What is heart rate variability? Heart rate variability (HRV) is a physiological marker of how we experience and regulate our emotions. But before we discuss HRV and emotion regulation in greater ...

Knowledge is power when it comes to performance, these picks help you get it.

Most fitness trackers offer a wealth of heart-rate data. Here’s how to make sense of it. By Talya Minsberg If you wear a smartwatch or fitness tracker, you likely already have access to a steady ...

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