Vagus nervous? The expert lowdown on vagus nerve stimulation and how to make it work for you

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Chances are you’ve come across the vagus nerve recently. Maybe in breathwork class, a therapy session, or while doomscrolling at night wondering why you can’t switch off. It's become one of those terms that gets dropped into wellness conversation with increasing confidence: activate your vagus nerve, reset your nervous system, improve your vagal tone. But for all the buzz, most of us are a bit hazy on what it actually is, let alone whether stimulating it makes any real difference.

Here's the thing: unlike a lot of wellness trends, the vagus nerve is genuinely fascinating and the science behind it is real. It's just that not everything sold in its name is.

What is the vagus nerve?

The vagus nerve is the longest cranial nerve in the body, running from the brainstem all the way down through the neck, chest and abdomen, weaving connections between your brain, lungs and gut.

“It helps regulate heart rate, digestion and stress response,” says Shelly Dar, BACP-registered psychotherapist. “When we talk about activating it, we’re really talking about improving vagal tone, the body’s ability to return to calm after stress. In practice, this is less about hacks and more about teaching the body signals of safety.”

Think of your vagal tone as the fitness level of your vagal pathways. It’s something that can be measured indirectly through something called heart rate variability (HRV), the slight variation in time between your heartbeats. Higher HRV is generally associated with better stress resilience, emotional regulation and cardiovascular health. Lower HRV has been linked with anxiety, burnout and poor recovery.

Here’s where it gets interesting for women specifically. Oestrogen supports vagal tone and HRV, which means hormonal shifts across perimenopause and menopause can have a direct physiological effect on stress resilience.

“A woman who coped reasonably well at 35 may find her stress resilience noticeably wearing thinner by 45,” explains energy and performance coach Joanne Pagett. “This isn’t because she’s becoming less capable, but because the physiological scaffolding has genuinely changed.”

Should you try vagus nerve stimulation?

So why is vagus nerve stimulation suddenly everywhere? The short answer: a combination of legitimate science, savvy marketing and a post-pandemic hunger for tools that help us feel a little less frazzled. Research into vagus nerve stimulation (VNS) has been building for decades in clinical medicine, for example implanted VNS devices have been approved for drug-resistant epilepsy and treatment-resistant depression since the 1990s. But the recent explosion of interest has been driven by a newer wave of non-invasive approaches, from breathing exercises to ear-clip electric devices, all promises similar benefits without the surgery.

The trouble is, the evidence base for these consumer approaches is considerably thinner, and more complicated, than the wellness industry tends to acknowledge.

6 methods for stimulating your vagus nerve

There are a spectrum of vagus nerve stimulation techniques, ranging from free and evidence-supported practices you can do at home, to expensive wearables whose clinical backing is still being established.

Breathing techniques

The most accessible, and arguably best-evidenced, form of vagal stimulation is something you’re already doing 20,000 times a day, just not very deliberately. Specific breathing patterns that extend the exhale have a direct, measurable effect on the parasympathetic nervous system – your body’s ‘rest and digest mode’ – with the vagus nerve playing a central role. Think of it like your body’s brake pedal: when you’re safe, relaxed or resting, it tells your body to calm down and take care of itself.

“The ‘physiological sigh’ involves a slow inhale through the nose, followed by a second short sip of air, then a long, extended exhale through the mouth,” explains Dar. “The extended exhale activates that calm-down response in your body and can quickly reduce physical tension. In group settings, you can feel the room soften in minutes.”

Stanford Medicine research found that cyclic sighing, a pattern similar to the physiological sigh, was the most effective of several breathing techniques tested for improving mood and reducing anxiety in real time. This is breathwork with genuine science behind it.

Try: Inhaling through your nose, taking a second small sip of air, then exhaling slowly and fully through your mouth. Repeat three times.

Humming and vocal vibrations

The vagus nerve connects to the muscles of the larynx and pharynx, meaning that vibration created through humming, singing or even gargling can stimulate vagal pathways directly. It sounds almost laughably simple, but the mechanism is real, according to Dar.

“Humming along to a song is a very simple way to shift your state quickly. Many people report warmth in the chest and a sense of grounding,” she tells us.

While large-scale studies on humming specifically are limited, the broader principle of it is reported by research into choral singing, group music-making and even chanting in meditative practices. Which is a very scientific way of saying joining a choir might genuinely be good for your nervous system.

Try: Choosing any song and humming along for two to three minutes. Notice whether there is a shift in your chest or jaw.

Cold exposure

Brief cold water exposure, specifically to the face or upper chest, triggers what is known as the diving reflex, a hardwired physiological response that slows your heart rate and shifts the nervous system into a parasympathetic state. It’s one reason why cold water swimming has gathered such an enthusiastic following, and why ending your shower with a cool blast has become a fixture of morning routine content.

The version Dar recommends is simple: turn the shower to cold for 20 to 30 seconds at the end of your usual routine. Not a Scandinavian ice bath. Just a manageable, bracing moment. That said, if you have any cardiac conditions, it's worth checking with your GP before making this a habit.

Try: Finishing your shower with 30 seconds of cooler water on your upper chest. It should feel bracing but manageable.

Rhythmic tapping and movement

“Light, repetitive tapping across the chest or collarbone area can help regulate arousal, the rhythm provides predictability, which the nervous system reads as safety,” Dar tells us.

This principle underpins several established therapeutic approaches, including EMDR (eye movement desensitisation and reprocessing), and various somatic therapies (treatment focused on how emotions appear in the body) used in trauma treatment. The evidence base here is strongest in clinical trauma contexts, though the underlying idea that slow, rhythmic, predictable sensory input helps dial down nervous system arousal, is well supported.

Try: Lightly tap across your collarbone or sternum in a slow, steady rhythm for one to two minutes. The predictability is the point.

Eating in a calm state

One of the more overlooked dimensions of vagal health is digestion. The vagus nerve is deeply involved in the gut-brain axis and plays an essential role in digestion. If you’re eating on the go, at your desk, or while mentally running through your to-do list, your body is essentially trying to do two incompatible things at once.

“If you are eating while stressed, your body prioritises survival over digestion,” explains Dar. “Three slow breaths before eating can make more difference that most supplements marketed for gut health.”

Try: Take three slow breaths before eating to shift out of sympathetic mode and support digestion.

Electrical stimulation devices

The consumer device market around vagus nerve stimulation has grown rapidly, with a range of wearable consumer devices, typically worn on the ear or neck, claiming to stimulate the vagus nerve electrically and effortlessly while you sit on the sofa.

The technology itself isn’t fiction – transcutaneous auricular VNS (taVNS) targets the auricular branch of the vagus nerve via the outer ear and is a real area of ongoing clinical research. But there’s an important distinction to understand here.

“Implanted VNS is a surgically implanted pulse generator connected to an electrode wrapped around the left cervical vagus nerve,” explains Dr Tony Banerjee from HarleyDoc. “Wearable ear-clip devices are non-invasive and marketed largely for wellbeing, though clinical research is ongoing and evidence quality varies by condition and device.”

The crucial distinction, according to Dr Banarjee, is between the well-established medical applications of implanted VNS (for things like epilepsy and treatment-resistant depression) and the claims made by consumer wellness wearables, which tend to be broader, more optimistic and considerably less rigorous.

“Many consumer vagus devices do overclaim, mainly by implying medical-level outcomes without medical-grade evidence, presenting early or condition-specific research as if it generalises to wellbeing, and using broad language like ‘reset your nervous system’, which isn’t a regulated clinic endpoint,” Dr Banerjee adds.

That isn’t to say these devices are useless. Research into their potential for anxiety, pain management and even inflammatory conditions is ongoing, and some findings are promising. However, the leap from promising early research to ‘buy this £200 ear clip for stress relief’ is a significant one. If you're curious, they appear to be generally safe for healthy adults, but if you have a heart condition, pacemaker, epilepsy or are pregnant, check with your GP first.

So, what is most likely to benefit?

If the wellness world has latched onto the vagus nerve with particular fervour, it’s not without reason. Because it turns out that the always-on, high-achieving, never-let-them-see-you-sweat way many of us operate is doing a number on our nervous systems.

Chronic high performance, especially in cultures that reward busyness and emotional suppression, keeps the body locked in sympathetic nervous system overdrive, and that sustained stress state is the enemy of good vagal tone.

“High achieving women tend to live in a state of being always on, always delivering, always anticipating the next thing. When ‘fight or flight’ becomes your default operating mode, vagal activity gets suppressed,” Pagett tells us. “Add in the hidden metabolic cost of appearing fine, managing perception, suppressing distress signals, maintaining composure, and the body is working far harder than it needs.”

Sounds familiar? For many, the slow erosion of stress resilience is mistaken for personal failing – a sign they’re not coping as well as they used to – rather than a physiological process happening beneath the surface.

“The body wasn’t failing to send signals, it was sending them constantly,” Pagett says. “It just took a while for the signals to get loud enough to hear.”

The good news is that the techniques with the strongest evidence behind them – the physiological sigh, humming, cold exposure, rhythmic movement and mindful eating – all have legitimate rationale and, crucially, are free, accessible and low risk. No device required.

It’s the consumer gadget market where things get murkier. ‘Vagus nerve’ has become shorthand for a broad range of wellness promises, and the marketing has sprinted ahead of the science. That doesn’t mean the research isn’t interesting (it is!), but interestingly early findings are not the same as a proven solution.

“Regulation comes from repetition,” concludes Dar. “Small, daily cues of safety matter more than dramatic wellness trends. The goal is not to eliminate stress, but to improve recovery.”

In other words, you do not need a gadget. You need consistency and a body that’s learned, slowly and surely, that it’s safe to rest.

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