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 ...

Brazilian researchers reveal that even mild cases of COVID-19 can temporarily reduce heart rate variability, with stress on the autonomic nervous system lasting up to six months—especially in older ...

Here’s what HRV is, how it works and what can cause it to rise or fall.

These days, it may seem like there’s a million different data points that you’re supposed to keep track of—hello, steps, sleep, and recovery scores!—and it’s difficult to know which ones are worth ...

This is the ultimate heart rate variability deep dive—nuanced, practical, and funny. I'll even share a story involving Andrew Huberman, Starbucks, and my girlfriend’s friend seeing my butt. Really..

Tracking key heart health metrics every day helps you understand how your lifestyle affects your cardiovascular system and empowers you to take proactive steps toward better heart health. Heart ...

Heart rate – the amount of times that your heart beats in a minute – is a tool that many runners use in training. But it’s what goes on between those beats that indicates how well you’re recovering, ...