Heart rate variability (HRV) is the beat-to-beat variation in your heart rate. Counter-intuitively, more variation is generally better. It reflects a responsive, well-balanced autonomic nervous system.
Why HRV is useful
HRV responds to sleep, training load, alcohol, illness and stress, often before you feel the effect. Tracked over time, it’s one of the most practical signals for guiding recovery, stress management and training decisions.
Reading the trend, not the number
Absolute HRV varies hugely between individuals and devices, so comparisons between people are close to meaningless. What matters is your own baseline and how it moves. A sustained drop is a flag; a rising trend suggests adaptation.
How clinics use HRV
Longevity, performance and functional practices bring HRV from Oura, Garmin, WHOOP and Apple Watch into one view alongside labs and other metrics, to see which interventions actually move recovery. See /solutions/biohacking, and the HRV entry in our /glossary.
Educational only, not medical advice.
See how clinics use Heads Up
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