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.

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

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, or HRV, is quickly becoming one of the most important metrics in modern fitness, and for good reason. Unlike heart rate, which tells you how fast your heart is beating, HRV ...

Fact checked by Nick Blackmer Most wearable devices now offer some form of recovery metric.These scores are typically derived ...

Is your heart rhythm chaotic? Researchers found that chaotic heartbeat patterns, not traditional HRV, are the secret to tracking cognitive brain activity.

Altered autonomic nervous system activity was linked to specific sleep disturbances, with distinct sex-based patterns.

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 ...