Can a few minutes of humming or singing calm your nervous system? Here’s what the science says, what it doesn’t say, and how to avoid turning another simple activity into a Long Covid treatment.
Does Humming Stimulate the Vagus Nerve?
Does humming help Long Covid? It’s a question worth asking when social media is full of promises that humming, singing or breathing exercises can reset your vagus nerve. Some research suggests these activities can influence breathing and heart-rate variability, but does that mean they can improve POTS, fatigue or other Long Covid symptoms? Let’s look at what the science actually tells us, what remains uncertain and whether humming is worth trying.
Humming may influence breathing patterns and heart-rate variability (HRV), but there is no convincing evidence that it treats Long Covid or repairs the vagus nerve.
Small studies in healthy people suggest that humming, singing and chanting can change the relationship between breathing and heart rhythm. However, this does not prove that the vagus nerve has been directly stimulated or that autonomic dysfunction has improved.
Gentle humming may be a pleasant relaxation technique for some people. Others may find it tiring, uncomfortable or unhelpful.
You can try it if it feels comfortable. You don’t need to do it to recover from Long Covid.
Key Insights
- Humming affects breathing. The rhythm of breathing is a likely explanation for many of the heart-rate changes observed during humming and singing.
- A change in HRV isn’t proof of healing. HRV varies with breathing, posture and other factors.
- There is no good clinical evidence that humming treats Long Covid.
- Slow, comfortable breathing has a stronger general research base than claims about humming directly stimulating the vagus nerve.
- POTS, breathlessness and PEM matter. Even gentle exercises should be adapted to your symptoms.
- You don’t need to buy anything. If humming feels pleasant, that’s a perfectly reasonable reason to do it.
Can Humming for 90 Seconds Really Reset Your Vagus Nerve?
You’ve probably seen the video.
Someone with a reassuring voice tells you to hum for 90 seconds.
Apparently, that’s all it takes to reset your vagus nerve, calm your nervous system and start healing.
Meanwhile, you’re lying on the sofa with your heart racing, feeling exhausted after making a cup of tea.
Ninety seconds sounds manageable.
It also sounds suspiciously easy.
But when you’re living with Long Covid, even the smallest possibility of relief can be tempting.
So, is there any science behind the humming advice?
Yes, a little.
Does it mean humming can reset your nervous system?
No.
And the difference matters.
Why Is Everyone Talking About the Vagus Nerve and Long Covid?
The vagus nerve is one of the main communication pathways between your brain and internal organs.
It plays a role in regulating heart rate, digestion and several other automatic bodily functions.
It also participates in pathways involved in inflammatory regulation.
This is relevant because many people with Long Covid experience symptoms involving the autonomic nervous system.
For example:
- Your heart races when you stand up.
- You feel dizzy or faint.
- Your digestion behaves unpredictably.
- You struggle with temperature regulation.
- Your body seems unusually sensitive to everyday activity.
These symptoms can occur with dysautonomia, including postural orthostatic tachycardia syndrome (POTS).
Researchers have found differences in vagus nerve appearance on ultrasound in some people with Long Covid.
But the findings are preliminary, and they don’t establish that everyone with Long Covid has vagus nerve damage.
They certainly don’t prove that humming can reverse it.
Want to understand the medical research? Read our companion article, Can Ultrasound or Vagus Nerve Stimulation Help Long Covid?, which examines ultrasound findings, electrical ear stimulation and clinical trials.
This article asks a different question: can simple activities such as humming or singing make you feel better?
What Actually Happens in Your Body When You Hum?
Try humming a short tune.
You’ll probably notice something.
You breathe in, then make a sound as you breathe out.
The sound naturally shapes the length and rhythm of your exhalation.
That’s important because your heart rate and breathing are connected.
Your heart rate normally speeds up slightly as you breathe in and slows as you breathe out.
This pattern is called respiratory sinus arrhythmia.
Despite the name, it is usually a normal physiological phenomenon.
The vagus nerve contributes to this regulation.
So when humming changes your breathing pattern, it can also change how your heart rate fluctuates.
This is one reason researchers are interested in humming, chanting and singing.
But it doesn’t mean that vibrations from humming have repaired or reset the vagus nerve.
What Did the Singing Research Find?
In a 2013 study, researchers examined how different types of singing affected breathing and heart-rate variability in a small group of healthy young adults.
Participants hummed, sang a hymn and performed a slow, structured mantra.
The researchers found that different singing patterns produced different breathing rhythms and corresponding heart-rate patterns.
The slow, structured singing produced particularly regular changes.
The researchers concluded that the structure of singing influenced breathing, which in turn influenced heart rhythm.
Interesting?
Definitely.
Evidence that humming treats Long Covid?
Not at all.
The participants were healthy young people, and the study wasn’t designed to measure Long Covid symptoms.
Read the original study by Vickhoff and colleagues.
Does Humming Really Stimulate the Vagus Nerve?
This is where social media often gets ahead of the science.
You may hear that humming creates vibrations in the throat, which directly stimulate the vagus nerve.
It’s an appealing explanation.
But direct therapeutic stimulation from humming has not been convincingly demonstrated.
There are several possible reasons someone might feel calmer while humming:
- Their breathing becomes slower or more regular.
- They focus on a repetitive, familiar sound.
- The activity distracts them from uncomfortable sensations.
- They enjoy the music or find it emotionally soothing.
These effects may overlap.
And some could involve normal autonomic regulation.
But that isn’t the same as proving that humming provides a clinically meaningful dose of vagus nerve stimulation.
Feeling calmer is a valid experience. Claiming the nerve has been repaired is a very different statement.
What About Chanting “OM”?
Researchers have also investigated chanting.
A small 2022 study examined heart-rate variability before and after five minutes of loud OM chanting.
It included 19 experienced yoga practitioners and 17 people without yoga experience.
The researchers observed changes in some HRV measurements, particularly among experienced practitioners.
They suggested that chanting might influence parasympathetic activity.
However, the study was small and did not establish that chanting improves Long Covid symptoms.
It also didn’t prove that throat vibrations directly stimulated the vagus nerve.
The participants’ breathing, familiarity with chanting and other factors may have influenced the results.
If My HRV Goes Up, Does That Mean My Vagus Nerve Is Improving?
Not necessarily.
Heart-rate variability measures changes in the time between successive heartbeats.
It is influenced by the autonomic nervous system, but also by breathing, sleep, posture, medications, illness and other factors.
You may have seen wearable devices that interpret HRV as a measure of recovery or nervous-system balance.
These measurements can be useful in certain contexts.
But one reading doesn’t tell the whole story.
For example, slow breathing can increase particular HRV measurements simply because breathing and heart rhythm become more closely coordinated.
That doesn’t demonstrate that Long Covid-related autonomic dysfunction has improved.
And a higher HRV reading isn’t automatically better in every circumstance.
Your symptoms, daily functioning and overall health matter more than chasing a particular number on a smartwatch.
Is Slow Breathing Better Than Humming?
If the aim is relaxation, slow breathing has a broader research base than humming-specific vagus nerve claims.
Studies outside Long Covid have investigated paced breathing and its effects on cardiovascular and autonomic measurements.
But there are two important qualifications.
First, changes in those measurements don’t necessarily translate into meaningful improvements in illness.
Second, many breathing protocols are designed for generally healthy participants.
They may not suit someone with significant POTS, breathlessness or other Long Covid symptoms.
You may see advice to breathe exactly six times per minute.
That rate is frequently used in research, but it isn’t a universal target.
For some people, trying to control their breathing too precisely can cause air hunger, dizziness or discomfort.
Comfortable, natural breathing is more important than achieving a number.
And if focusing on breathing makes you feel worse, there is no reason to force it.
Can Humming Make Long Covid Symptoms Worse?
Potentially, yes.
Humming is usually a gentle activity, but gentle doesn’t mean effortless.
It requires breath control, vocal activity and attention.
Singing can involve even more effort, particularly if you’re sitting upright, projecting your voice or singing for several minutes.
For someone with post-exertional malaise (PEM), even small activities can sometimes contribute to symptom worsening.
This is why advice such as “hum for 15 minutes every morning” may not be appropriate for everyone.
You also need to consider symptoms such as:
- Dizziness or feeling faint
- Breathlessness
- Chest discomfort
- Palpitations
- Sensitivity to sound
- Fatigue after speaking or singing
If humming aggravates your symptoms, stop.
If you develop new or significant chest pain, severe breathlessness or fainting, seek urgent medical assessment rather than trying to manage the symptoms with breathing exercises.
How Can I Try Humming Without Overdoing It?
If humming sounds appealing and you don’t have a medical reason to avoid it, keep things simple.
You don’t need an elaborate routine.
A Gentle Way to Experiment
- Get comfortable. Sit supported or recline if that is easier for your symptoms.
- Breathe normally. Don’t start with a deep breath or try to fill your lungs completely.
- Hum softly as you breathe out. Choose a comfortable sound and stop before you run out of breath.
- Return to normal breathing. There is no need to maintain a particular rhythm.
- Start with one or two hums. See how you feel before considering more.
- Pay attention afterwards. Notice whether you feel comfortable, unchanged or worse, including later if you experience PEM.
There is no evidence-based humming dose for Long Covid.
You don’t need to hum loudly.
You don’t need to make the sound vibrate through your head.
And you certainly don’t need to continue until you feel something happening.
If you enjoy it, that’s enough.
If you don’t, leave it.
What If Singing Makes Me Feel Better?
Then singing may have a place in your day, provided it fits within your energy limits.
Music can be enjoyable, familiar and emotionally meaningful.
For someone whose life has become smaller because of Long Covid, singing along to a favourite song may offer a moment of normality.
That matters.
But we don’t need to turn every pleasant experience into a medical intervention.
Singing doesn’t have to repair your nervous system to be worthwhile.
You might sing one line of a song.
Or hum along while lying down.
Or simply listen to music instead.
The aim isn’t to complete an exercise.
It’s to find something that feels good without paying for it later.
What About Gargling, Cold Showers and Other Vagus Nerve Exercises?
Humming often appears on the same list as gargling, cold-water exposure, breath-holding and various techniques promoted as ways to improve vagal tone.
These activities are not interchangeable.
They have different physiological effects and different risks.
Cold-water exposure, for example, can produce abrupt cardiovascular and breathing responses.
That may be particularly uncomfortable or inappropriate for someone with POTS, cardiovascular problems or significant autonomic instability.
Gargling can be tiring or provoke coughing in some people.
And breath-holding can worsen dizziness or air hunger.
None of these should be assumed to treat Long Covid simply because they are described as vagus nerve exercises.
If you’re curious about medical stimulation devices rather than everyday relaxation activities, see our separate article on ultrasound and electrical vagus nerve stimulation in Long Covid.
Why Do Simple Long Covid “Hacks” Spread So Quickly?
Because they offer something people with Long Covid desperately want: a little control.
When symptoms are unpredictable and treatments remain limited, the idea that a free, simple activity could help is understandably attractive.
And social media rewards confident explanations.
“Try humming and see whether it helps you relax” isn’t particularly exciting.
“Reset your vagus nerve in 90 seconds” sounds like a breakthrough.
The problem is that the second statement makes a medical promise the evidence doesn’t support.
It can also create an uncomfortable expectation.
If the technique doesn’t work, you may wonder whether you did it incorrectly.
Perhaps you didn’t hum for long enough.
Perhaps you weren’t relaxed enough.
Perhaps you need to practise every day.
But a technique failing to improve your symptoms doesn’t mean you failed.
It may simply mean the technique doesn’t address the processes driving your illness.
Long Covid is not a condition that can be reduced to insufficient relaxation.
Is Humming Worth Trying?
It depends on what you want from it.
If you’re hoping humming will repair vagus nerve damage, treat POTS or reverse Long Covid, there isn’t evidence to support those expectations.
If you want a free, gentle activity that might help you feel calmer for a moment, it may be worth trying if your symptoms allow.
You don’t need to monitor your HRV.
You don’t need a subscription.
You don’t need a device.
And you don’t need to make it part of a daily recovery programme.
Sometimes a small, enjoyable activity can just be a small, enjoyable activity.
That is not a failure of science.
It’s simply a more realistic expectation.
Final Thoughts: You Don’t Have to Hum Your Way Out of Long Covid
The vagus nerve is a legitimate area of medical research.
Humming and singing can affect breathing patterns and heart-rate variability.
But the leap from those observations to “humming treats Long Covid” is much bigger than social media makes it sound.
If humming helps you settle, enjoy it.
If singing brings back a little pleasure, make room for it when you can.
But if neither does anything for you, you haven’t missed a treatment.
You can appreciate a calming technique without believing it is a cure.
And you can take your Long Covid seriously without turning every moment of your day into another attempt to fix yourself.
Frequently Asked Questions
Does humming stimulate the vagus nerve?
Humming changes breathing patterns, which can influence heart-rate variability through normal autonomic mechanisms. However, this does not prove that humming directly stimulates the vagus nerve in a way that treats illness.
Can humming help Long Covid?
Some people may find humming relaxing, but there is no convincing clinical evidence that it improves Long Covid symptoms or treats the underlying condition.
How long should I hum to activate my vagus nerve?
There is no established humming duration or dose for treating Long Covid. If you want to try it for relaxation, begin with one or two comfortable hums rather than forcing a timed session.
Is humming good for POTS?
Humming is not an established POTS treatment. Some people may find it relaxing, while others may experience dizziness or discomfort with controlled breathing. Follow your clinician’s advice for managing POTS.
Does singing improve heart-rate variability?
Small studies in healthy people suggest that singing can influence HRV, partly through changes in breathing. That doesn’t establish that singing treats autonomic dysfunction or Long Covid.
Can humming help with anxiety or feeling overstimulated?
Some people find repetitive sounds and gentle breathing calming. Responses vary, and humming should be considered an optional relaxation activity rather than a medical treatment.
Is humming better than electrical vagus nerve stimulation?
They are different approaches and cannot be compared directly based on the available evidence. Humming is an everyday activity; electrical stimulation uses devices to deliver controlled impulses. Neither is an established treatment for Long Covid.
Can humming make PEM worse?
Any activity that exceeds an individual’s tolerance may contribute to symptom worsening in someone with PEM. Humming is generally low effort, but it should be stopped if it causes discomfort or delayed symptom worsening.
Related Reading on Long Covid Journey
Can Ultrasound or Vagus Nerve Stimulation Help Long Covid? (soon online)
What research really says about vagus nerve ultrasound scans, focused ultrasound, electrical ear stimulation and experimental treatments.
Dysautonomia in Long COVID: Why Does Everything Feel So Much Harder?
Understand how autonomic dysfunction can affect heart rate, digestion, temperature regulation and everyday activities.
POTS and Orthostatic Intolerance: What You Need to Know
Why standing up can trigger dizziness, palpitations and exhaustion.
Long Covid Fatigue: Everything You Need to Know in 4 Minutes
Why Long Covid fatigue is different from ordinary tiredness and why pacing matters.
The Cure for Long COVID: Apparently, It’s Everything
A closer look at the many treatments promoted for Long Covid and the gap between promising research and proven cures.
References
- Vickhoff B, et al. (2013). Music structure determines heart rate variability of singers. Frontiers in Psychology.
https://doi.org/10.3389/fpsyg.2013.00334 - Immediate Effects of OM Chanting on Heart Rate Variability Measures Compared Between Experienced and Inexperienced Yoga Practitioners (2022). International Journal of Yoga.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9015091/ - Lladós et al. Vagus nerve dysfunction in the post-COVID-19 condition: a pilot cross-sectional study. Clinical Microbiology and Infection.
https://www.sciencedirect.com/science/article/pii/S1198743X23005657
Medical Disclaimer: Long Covid Journey is a patient-led educational resource. This article provides general information, not medical advice. Humming, singing and breathing techniques are not established treatments for Long Covid. If you have significant breathlessness, cardiovascular symptoms, fainting episodes or other medical concerns, seek guidance from a qualified healthcare professional. Stop any activity that makes your symptoms worse.
Research reviewed: October 2026.