Primespan Tools

HRV Interpretation Tool

See where your heart rate variability ranks against population norms — and what it means for recovery and longevity.

Your HRV (RMSSD)

In milliseconds. From Whoop, Garmin, Apple Watch, or Oura.

Age

Sex

Device

Enter your HRV and age to see your results

ms RMSSD

Percentile

Median for age

75th percentile

Your position in the population

5th25th50th75th95th

RMSSD norms: Median and 75th percentile from Tegegne et al. (2021) and Task Force HRV Standards (1996).
Percentile bands (10th, 25th, 90th) interpolated from published median and 75th - treat as approximations.
Device note: Overnight RMSSD (Whoop, Oura) correlates well with clinical norms. Spot-checks (Apple Watch) are less stable.
HRV declines ~2-3 ms/decade. Norms are age-adjusted. Track trends over 4+ weeks.

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Estimates based on population-level data. Individual responses vary. Not medical advice.

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