Heart rate and heart rate variability are often confused. The first counts your beats per minute. The second measures the tiny time variations between two beats. Contrary to what you might expect, a healthy heart doesn't beat like a metronome — it varies. The greater this variation at rest, the better your nervous system adapts.
Why HRV matters so much
Your HRV reflects the balance between two branches of your autonomic nervous system: the sympathetic (accelerator, stress, action) and the parasympathetic (brake, rest, recovery). A high HRV signals good parasympathetic tone, meaning a strong ability to recover. An HRV that crashes is often the first sign of fatigue, an oncoming infection, too much alcohol, or accumulating stress — sometimes before you even feel it.
How to read your HRV
The absolute value matters less than your personal trend. HRV depends on age, genetics and fitness: comparing yours to a friend's makes no sense. What's useful is your baseline and your deviations from it.
- Above your baseline: your body is well recovered, it's a good day for an intense effort.
- Close to your baseline: all good, train as normal.
- Clearly below: prioritize recovery, sleep and a lighter load.
5 ways to improve your HRV
- Sleeping enough and consistently : deep sleep boosts HRV. See our article on deep sleep.
- Slow breathing : 5 to 6 breaths per minute for a few minutes directly stimulates the parasympathetic system.
- Limiting alcohol : even one drink in the evening can tank your overnight HRV.
- Move without overdoing it : gentle endurance training raises HRV, overtraining tanks it.
- Manage stress : chronic stress keeps the system on alert. See managing stress day to day.
Measuring your HRV with KEORA
The KEORA Ring measures your HRV during the night, at the most reliable moment, and combines it with your sleep and heart rate to produce a clear recovery score. When your recovery drops consistently, the app can recommend the formula Ritual Recovery, based on curcumin, to support active recovery.
Your HRV doesn't lie. Every morning it tells you what your body is capable of today.