What your watch or ring means by HRV
Every device measures it its own way. Pick yours to see what it measured, what its words mean, and how to judge your number.
What do Oura's HRV and HRV Balance mean?
Oura measures RMSSD in five-minute samples while you sleep. What the average, the maximum and HRV Balance mean, and how close Oura comes to an ECG in independent tests.
What does Apple Watch HRV mean?
Apple Watch reports HRV as SDNN from short samples, not the RMSSD rings use. What Series 12's Recovery HRV adds, and how accurate the watch is against a chest strap.
What does Garmin HRV status mean?
Garmin compares your 7-day average HRV with your own three-week range. What Balanced, Unbalanced, Low and Poor mean, why Unbalanced can be high, and how accurate it is.
What does WHOOP's HRV number mean?
WHOOP gives one RMSSD value a night, weighted toward deep sleep and later hours. How it feeds Recovery, what green, yellow and red mean, and how it compares with an ECG.
Your number
See what last night's number means for your device, or check your Garmin HRV Status.
