On average, yes. People with anxiety disorders tend to have lower resting HRV than people without them, but the gap is modest and HRV cannot tell you whether you have an anxiety disorder.
What the research shows
Two large reviews have compared resting HRV in people with a diagnosed anxiety disorder and people without one.
- A 2014 review pooled 36 studies with 2,086 people with an anxiety disorder and 2,294 without. The anxiety groups had lower HRV, with a small-to-moderate difference. Lower HRV showed up in panic disorder, PTSD, generalized anxiety disorder and social anxiety disorder.
- A 2022 review pooled 99 studies with 4,897 people with an anxiety disorder and 5,559 without. It found the same pattern: lower resting HRV in the anxiety groups, again a small-to-moderate difference.
The two groups overlap a lot. Plenty of people with an anxiety disorder have ordinary HRV, and plenty of calm people have low HRV. These studies used resting recordings taken under study conditions, which differ from a nightly wearable reading.
Why anxiety and HRV are linked
HRV mostly reflects the calming branch of your nervous system, which works through the vagus nerve Vagus nerve The main nerve of the parasympathetic nervous system, running from the brainstem to the heart, lungs and gut. Its fast signals to the heart drive most beat-to-beat HRV. More about Vagus nerve . When you feel safe and relaxed, this branch slows your heart and lets the gap between beats rise and fall with your breath. That gives a higher HRV.
When you feel threatened, the calming branch steps back and the “alert” branch takes over. Your heart rate rises and the beats become more even, so HRV falls. Anxiety keeps that alarm partly switched on, even when there is no real danger. The lesson on the nervous system behind HRV explains this in more detail.
These reviews show a link, not cause and effect. Sleep, exercise, caffeine, alcohol and medicines can also differ between the groups being compared.
What HRV cannot tell you
- It cannot diagnose anxiety. An anxiety disorder is more than occasional worry. It is anxiety that does not go away, shows up in many situations and can get worse over time. Only a conversation with a professional can assess that.
- It cannot tell anxiety apart from other strain. A low reading after a bad night, a few drinks or a coming cold looks the same as a low reading after a worried day. The page on HRV and stress covers this.
- A normal HRV does not mean you are fine. If you feel anxious, that feeling counts, whatever the app says.
What to do with your own data
- Look for patterns over weeks. Note stressful days and see whether your HRV tends to dip after them. Single days are too noisy to read much into.
- Try slow breathing. Most studies find that breathing at about six breaths a minute makes the heart rate swing most with each breath, so HRV goes up while you do it. See can breathing exercises raise your HRV? for how.
- Consider guided training. A 2017 review of 24 studies with 484 people found that HRV biofeedback HRV biofeedback A breathing practice in which you watch your heart rate live and breathe slowly, often near 6 breaths a minute, to make the heart's rise and fall with each breath as large as possible. More about HRV biofeedback training (slow, paced breathing guided by your heart rhythm) was linked to a large drop in self-reported stress and anxiety. The authors said more well-controlled studies are needed.
- Step back if tracking feeds your worry. Checking a number every morning can become one more thing to fret about. Weekly averages are enough.
When to talk to a doctor
Talk to a doctor or mental health professional if worry or fear is hard to control, lasts for weeks, or gets in the way of work, sleep or relationships. Seek urgent care for chest pain, fainting or trouble breathing; these can feel like anxiety but need checking. If you are in crisis or thinking about harming yourself, contact your local emergency number or a crisis line straight away.