- HRV is the variation in time between heartbeats — and counterintuitively, more variability is healthier.
- High HRV signals a flexible autonomic nervous system that shifts smoothly between stress and recovery.
- HRV is trainable: slow paced breathing around six breaths per minute raises it over weeks.
- HRV biofeedback has evidence for anxiety, hypertension, and stress-related conditions.
Heart rate variability (HRV) is the variation in time between consecutive heartbeats. Counterintuitively, more variability is healthier — it signals a flexible autonomic nervous system that can shift smoothly between stress and recovery. HRV biofeedback trains that flexibility directly, and has evidence for anxiety, hypertension, and stress-related conditions.
Why variability is good
A healthy heart does not beat like a metronome. Between beats, your autonomic nervous system is constantly adjusting — speeding up on the inhale, slowing on the exhale. High HRV means that system is responsive and well-regulated. Chronically low HRV is associated with stress load, poor recovery, and higher cardiovascular risk.
What you can do with it
HRV is not just a metric to watch — it is trainable. Slow, paced breathing at roughly six breaths per minute maximizes the natural coupling between breath and heart rate, and practiced consistently it raises resting HRV over weeks. Biofeedback makes this visible in real time, so you can feel exactly what shifts your nervous system toward recovery.
Where it's used
- Anxiety and chronic stress
- Hypertension and cardiovascular reactivity
- Long COVID autonomic dysregulation and POTS
- Sleep and recovery
- Focus, performance, and emotional regulation
A wearable can show you the number. Biofeedback teaches you to move it — turning a passive metric into a skill you own.
In practice: why this matters
Wearables have put HRV in millions of pockets, but few people know what it means or how to move it. Turning that raw data into a trainable skill — rather than one more anxiety-inducing metric — could make self-regulation a mainstream health practice, easing the population-level burden of chronic stress at almost no cost.
Frequently asked questions
Why is higher HRV better?
A healthy heart does not beat like a metronome. Between beats, your autonomic nervous system constantly adjusts — speeding up on the inhale, slowing on the exhale. High HRV means that system is responsive and well-regulated; chronically low HRV tracks with stress load and higher cardiovascular risk.
How do I raise my HRV?
The most reliable method is slow, paced breathing — for most people around six breaths per minute, with a longer exhale than inhale — practiced consistently. Biofeedback makes the effect visible in real time, which accelerates learning. Sleep, exercise, and reduced alcohol also help.
References
- Lehrer PM, Gevirtz R. Heart rate variability biofeedback: how and why does it work? Frontiers in Psychology. 2014;5:756. doi:10.3389/fpsyg.2014.00756
- Shaffer F, Ginsberg JP. An Overview of Heart Rate Variability Metrics and Norms. Frontiers in Public Health. 2017;5:258. doi:10.3389/fpubh.2017.00258
Peer-reviewed sources located via PubMed and cited for education. Citations reflect published research at time of writing.
Dr. Andrew Simon, ND, BCB
Licensed naturopathic physician and board-certified biofeedback practitioner in Seattle. Clinic Director of Rebel Med NW, adjunct clinical faculty at Bastyr University, six-time Seattle Met Top Doctor, and the naturopathic advisor to Washington State on Long COVID. Read full bio →
This article is for educational purposes and is not a substitute for individualized medical care. Talk with a qualified clinician about your specific situation.