Researchers have found that HRV is a useful metric to assess athletic performance, and a higher HRV has been associated with ...

HRV is a relatively new metric that measures variations in your heartbeat. There’s no formal guidance on what an optimal HRV is. Your heart rate variability (HRV) is a measure of the difference ...

After last year’s revamp, Fitbit has been slowly updating more and more of the mobile app, with Heart Rate stats being the latest redesign. There’s no change to the card in the Today tab, but the page ...

If you wear a fitness tracker, you've likely seen a stat labeled "HRV" pop up on your screen. But what does it mean, and does it matter? Short for heart rate variability, HRV has become a popular ...

The Charge 5 is Fitbit’s most advanced fitness tracker to date. It brings some of the advanced sensor tech introduced in the Fitbit Sense to a more affordable wearable. This includes an EDA stress ...

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 ...