Is an HRV of 25 ms good?
By Aditya Ganapathi · Co-Founder of Cora ·
An HRV of 25 ms is considered below average for most adults. At 25 ms, you are below the population average for most adults. The average below the average for adults in their 50s (average ~38 ms) and at the low end of normal for adults in their 60s. This reading typically indicates suboptimal recovery or elevated stress load, particularly for adults under 55.
How 25 ms compares to HRV averages by age
RMSSD (root mean square of successive differences) is the most common HRV metric reported by consumer wearables including Apple Watch, Garmin, Whoop, and Oura. Population averages from clinical studies and aggregated wearable data show a clear age-related decline — and significant individual variation at every age. The table below shows where 25 ms sits relative to each decade.
| Age Group | Average RMSSD | Typical Range | 25 ms is… |
|---|---|---|---|
| 20s | ~75 ms | 55–105 ms | 50 ms below average |
| 30s | ~62 ms | 45–85 ms | 37 ms below average |
| 40s | ~48 ms | 35–65 ms | 23 ms below average |
| 50s | ~38 ms | 25–55 ms | 13 ms below average |
| 60s | ~30 ms | 20–45 ms | near the average |
Sources: Schumacher et al. (2022), Journal of Applied Physiology; aggregated population data from Whoop, Oura, Garmin, and Apple Watch. Wrist-based optical sensors may produce slightly different absolute values than ECG-derived measurements. Use the directional pattern — not the exact number — for comparison. See the full HRV chart by age.
What an HRV of 25 ms typically indicates
An HRV of 25 ms RMSSD is within the low end of the expected range for adults in their 60s, but below average for every younger age group. Adults in their 50s average around 38 ms, and adults in their 40s average 48 ms — so at 25 ms, most people under 60 are seeing a reading that suggests room for improvement in recovery and stress management.
Schumacher et al. (2022) place this range in the lower quartile for most adult populations, associating it with reduced vagal tone and higher sympathetic activity at rest. Day-to-day factors that commonly suppress HRV into the 20–30 ms range include: one or more nights of poor sleep, moderate alcohol intake, high cumulative training stress without deload weeks, and elevated psychological stress. These are all highly modifiable.
If 25 ms is your consistent baseline over the past month, rather than a recent dip, individual variation is a plausible explanation — particularly for older adults or people with higher resting heart rates. However, most people in good cardiovascular health who train consistently and sleep well will see readings above this threshold. Use it as a trigger for a recovery audit.
For deeper context on what HRV measures and how it connects to training decisions, see What is HRV and What is RMSSD.
What to do about an HRV of 25 ms
- 1
Shift the next 5–7 days toward lower training intensity — Zone 1–2 only, with at least one full rest day.
- 2
Target 7.5–9 hours of sleep per night with a consistent wake time, even on weekends.
- 3
If you have not had a deload week in the last 4–5 weeks, schedule one: reduce volume by 40–50% for a full week.
- 4
Monitor alcohol: track whether your HRV reading rises on alcohol-free nights versus drinking nights.
- 5
Add 10 minutes of diaphragmatic breathing or box breathing each evening to actively stimulate parasympathetic tone.
- 6
Use 7-day rolling average rather than daily readings — a single day at 25 ms is far less meaningful than a week-long average at that level.
Track your HRV trend automatically with Cora
Cora reads your HRV from Apple Watch, Garmin, or Oura and tracks your rolling 7-day and 30-day baseline — flagging meaningful deviations so you know when to push and when to back off.
Download Cora — FreeFrequently asked questions about HRV of 25 ms
Is 25 ms HRV good for a 50-year-old?
It depends on the individual, but 25 ms falls below the average for 50-year-olds (around 38 ms). The typical range for that decade is 25–55 ms, so 25 ms is at the low end but not outside normal limits. Focus on whether your trend is stable or declining.
How does 25 ms compare to athletes?
Recreational athletes typically average 50–80 ms or more, and elite endurance athletes can see averages of 90–120 ms or higher. A reading of 25 ms suggests either age-related baseline, recovery deficit, or lower fitness level relative to trained peers.
Can dehydration cause HRV to drop to 25 ms?
Yes. Dehydration increases cardiac workload and sympathetic activity, which suppresses parasympathetic (vagal) tone and lowers HRV. Adequate daily hydration (roughly 2–3 liters depending on body size and activity) is a basic but often overlooked factor in maintaining HRV baseline.
Is 25 ms HRV enough to train hard?
That depends on your personal norm. If your typical range is 35–50 ms and you are reading 25 ms, it is a signal to keep today's session easy and prioritize recovery. If 25 ms is your consistent baseline, your body has adapted to it and you can likely train — though raising your baseline over time through lifestyle adjustments will improve resilience.
Want full context on HRV by age? Our comprehensive guide HRV Chart by Age: Normal Ranges and What They Mean covers the complete population data, what drives the age-related decline, and how to interpret your own trend.