HRV by age

Your device
Vively member data
Where does your Apple Watch HRV sit?

Pick your sex and age group, then type your Apple Watch heart rate variability in milliseconds (Health app, Heart Rate Variability).

See the numbers as a table
Group (ms)Members10th25thMedian75th90th
Women 30 to 39833139425060
Women 40 to 491832731374553
Women 50 to 591952528334049
Women 60 to 69772226293749
Men 40 to 49872833384758
Men 50 to 59672529354353

Apple Watch HRV (SDNN), member averages October 2025 to September 2026, members with 21 or more days. Other devices measure HRV differently. How we got these numbers.

How HRV changes with age

Vively member data
HRV by age (Apple Watch, SDNN)

HRV tends to fall with age. The shaded band is the middle 50% of members, the line is the median.

See the numbers as a table
Group (ms)Members10th25thMedian75th90th
Women 30 to 39833139425060
Women 40 to 491832731374553
Women 50 to 591952528334049
Women 60 to 69772226293749
Men 40 to 49872833384758
Men 50 to 59672529354353

Apple Watch HRV (SDNN), member averages October 2025 to September 2026, members with 21 or more days. Other devices measure HRV differently. How we got these numbers.

How we got these numbers

These figures come from Vively members who connected a wearable to the Vively app and wore it on at least 21 days between October 2025 and September 2026: 692 on Apple Watch and 715 on Oura, Whoop, Garmin, Fitbit and similar devices. We kept the two groups apart because Apple Health reports SDNN while most other devices report RMSSD, and their methods vary. We took each member’s average, then worked out percentiles across members in each sex and age group. Every group shown has 50 or more members, so there is not enough data yet for Apple Watch: women aged 18 to 29 and men aged 18 to 29, 30 to 39, 60 to 69; and for other devices: women aged 18 to 29, 60 to 69 and men aged 18 to 29, 60 to 69. The full method is on how we get our numbers.

What moves HRV

  • Age. HRV generally falls as we get older, as the chart shows.
  • Fitness and health. Time-domain HRV tends to rise with aerobic fitness and fall with poorer health.
  • How and when it is measured. Recording length, body position, breathing, recent exercise and heart rate all change the number, and values from different methods are not interchangeable.
  • Heart rate. A faster heart rate goes with lower variability.

That is why your own trend, measured the same way, tells you more than one day’s reading or a comparison with someone else.

What these numbers can’t tell you

  • SDNN and RMSSD are different measures. SDNN reflects overall variability. RMSSD reflects beat-to-beat changes linked to the parasympathetic nervous system. Pick the option that matches your device.
  • Brands within the “other devices” group use different methods, so treat that chart as a guide.
  • Vively members chose to connect a wearable to the app, so they are not a cross-section of Australia. Treat these numbers as a comparison, not a target.
  • HRV cannot tell you about your blood sugar, cholesterol, iron or inflammation. That takes a blood test.

Talk to your GP if you feel faint, have palpitations or an irregular heartbeat. A wearable is not a heart test.

Your watch shows how fit you are. Your blood shows what is underneath.

The Baseline Health Check measures 70+ blood markers, and you see them in the Vively app next to your wearable data.

Get my Baseline

Questions people ask

What is a good HRV by age?

It depends on your device, sex and age. Among Vively members aged 40 to 49, the median Apple Watch HRV (SDNN) is 37 ms for women and 38 ms for men. On Oura, Whoop, Garmin and similar devices (mostly RMSSD) it is 34 ms and 40 ms.

What is the difference between SDNN and RMSSD?

SDNN is the standard deviation of the gaps between heartbeats and reflects overall variability. RMSSD focuses on beat-to-beat changes and is the usual measure for vagally mediated HRV. Apple Health reports SDNN. Most other wearables report RMSSD.

Can I compare my Apple Watch HRV with my friend’s Oura?

No. The measures and the way they are recorded differ, so the numbers are not interchangeable. Compare yourself with people on the same type of device, and track your own trend.

Does HRV go down with age?

On average, yes, in these data and in the published literature. Individual HRV varies a lot, and fitness can offset some of the effect.

Is a low HRV a sign of a health problem?

Not on its own. A single low reading can reflect a poor night, illness, stress or a hard workout. Talk to your GP if you have symptoms such as palpitations, fainting or chest pain.

More tools

Sources

  • Shaffer F, Ginsberg JP. An overview of heart rate variability metrics and norms. Front Public Health. 2017;5:258.
  • Vively member data, October 2025 to September 2026. Methods.