Regulating your nervous system: what actually works

"Regulate your nervous system." It's one of the most widely shared health tips right now, and social media offers hundreds of ways to do it: cold plunges, humming, gargling, tapping, acupressure mats, vibration plates and small gadgets to clip on your ear. But what does regulating your nervous system actually mean? And what really has research behind it?

A nervous system that can switch gears

The autonomic nervous system controls the things you don't have to think about, such as your heart rate, blood pressure, breathing and digestion. It works a bit like an accelerator and a brake. The accelerator, the sympathetic nervous system, revs you up when something needs your attention: your heart beats faster, your muscles tense and you become more alert. The brake, the parasympathetic nervous system, helps your body wind down again. Your heart rate drops, digestion gets going and your body recovers.

So a well-functioning nervous system isn't one that is always calm. It should be able to switch gears: up when you need it, and back down afterwards.

When the accelerator stays pressed

The problem comes when your body stays on alert after the stressful moment has passed. That can feel like a racing heart, tense shoulders, shallow breathing, an unsettled stomach, getting irritated easily or finding it hard to wind down in the evening. Long-term stress and too little recovery have also been linked to poorer sleep and a higher risk of heart and circulation problems.

Some people notice it in their heartbeat. One of our clients described it as her heart holding its breath every few beats. Skipped or extra beats like this are common and often harmless, but they are worth having checked by a doctor.

How is it measured?

A common measure is heart rate variability, or HRV, which is the tiny differences in time between heartbeats. HRV can show how your autonomic nervous system is working, and many smartwatches now display it. But it isn't a number you need to chase. HRV is affected by sleep, alcohol, illness, exercise and even the time of day, so one low reading doesn't mean something is wrong.

Hormones affect regulation

This part is rarely talked about. A 2026 review looked at how hormones affect the nervous system in women. Oestrogen was linked to a stronger brake, with more parasympathetic activity and higher HRV. When oestrogen falls, as in the second half of the menstrual cycle, that balance changes. The change was clearest during major hormonal shifts, including after pregnancy and around menopause.

The research in this area is still quite new. But it may help explain why some women feel more on edge before a period, or notice that stress affects them more in their 40s. In our clinic, we therefore ask about your menstrual cycle and stage of life when we talk about stress, not just about what is happening in your life.

What has the best evidence

The research mainly points to fairly simple things.

1. Slow breathing

Breathing is a simple way to influence your autonomic nervous system. Try breathing in for about five seconds and out for about five, which gives you around six breaths a minute.

A 2023 Stanford study tested different breathing exercises and meditation for 5 minutes a day for a month. Cyclic sighing, where you take two breaths in through the nose and then one long, slow breath out, stood out. It improved mood more than meditation and made breathing calmer. It was a small study of 111 people, but breathing exercises are free and safe for most people to try.

2. Meditation and mindfulness

A 2024 systematic review linked mindfulness programmes to less anxiety and better emotional control, along with changes in parts of the brain involved in emotion. Many of the studies were small, but overall the research suggests regular practice can help.

3. Movement and recovery

Regular walking, cycling, or swimming can support your autonomic nervous system and improve HRV over time, and time outdoors seems to help too. But more isn't always better. Hard training without enough rest can have the opposite effect.

4. Routine

Your nervous system seems to like predictability. Go to bed and get up at similar times, eat at regular times, and take real breaks from screens, especially in the evening.

What you can skip

A cold plunge first triggers a strong stress response. Afterwards, your heart rate can drop again, and some people feel calm. That's fine if you enjoy it, but there's still not strong evidence that cold plunges improve your body's ability to handle stress in the long run. If you have a heart condition, talk to a doctor first. Cold water on your face, on the other hand, can briefly lower your heart rate through what is called the diving reflex.

The vagus nerve plays an important part in the body's parasympathetic regulation, and vagus nerve stimulation is an established medical treatment. It's used for some types of epilepsy and depression, among other things, and a 2026 review also found promising results in rheumatic diseases, though larger studies are needed. That's very different from the wellness gadgets sold online to "stimulate your vagus nerve". Most have limited independent research behind them, and the same goes for acupressure mats. In our clinic, we would rather start with breathing, sleep and routine than with a gadget.

Sometimes it isn't your nervous system

Feeling on edge all the time can have a physical cause. An overactive thyroid can cause a racing heart, anxiety, poor sleep and weight loss. Too much caffeine, unsteady blood sugar, some medicines, and the menopause can feel similar.

See a doctor if you have a racing or irregular heartbeat, chest pain, weight loss you can't explain, or anxiety that affects your daily life.

So where do you start?

Start small. Five minutes of slow breathing a day is a good beginning. Move most days, but give your body rest days too. Try to go to bed, wake up, and eat at roughly the same times, and give yourself an hour without screens before you sleep. The aim isn't to avoid ever feeling stressed. The aim is to build your resilience, so that you function under pressure and return to calm easily afterwards.

At Wellth, we look at your blood values alongside how you sleep, eat, move and feel, and where you are in your cycle or life. Then we work out what to change first.

Sources

Kazdağlı H, Altınoluk T. Autonomic nervous system regulation in women: electrophysiological signatures of stress reactivity across the female lifespan. Neuropsychobiology. 2026. doi:10.1159/000553294
Balban MY, Neri E, Kogon MM, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine. 2023;4(1):100895. doi:10.1016/j.xcrm.2022.100895
Calderone A, Latella D, Impellizzeri F, et al. Neurobiological changes induced by mindfulness and meditation: a systematic review. Biomedicines. 2024;12(11):2613. doi:10.3390/biomedicines12112613
Wysokińska A, Jaszczyk B, Sadura-Sieklucka T, et al. Vagus nerve stimulation in rheumatic diseases: linking autonomic nervous system regulation, inflammation, and clinical outcomes. Rheumatology International. 2026;46(10):260. doi:10.1007/s00296-026-06293-z