Nervous System Regulation: How to Calm Your Body and Mind

About nervous system regulation

What it is, why it happens and what helps. Contents:

• What is nervous system regulation?
• Your autonomic nervous system
• The stress response
• Signs your system is on high alert
• The window of tolerance
• Polyvagal theory
• The vagus nerve
• Breathing
• Cyclic sighing
• Relaxing the body
• Movement and exercise
• Nature
• Connection with others
• Sleep and rest
• Somatic approaches
• Heart rate variability
• A simple 4-week plan
• How self-help methods fit in
• FAQs

What is nervous system regulation?

Nervous system regulation is the ability to move between activity and rest: to rise to a challenge when you need to, and to settle again afterwards. A regulated nervous system is not one that is always calm. It is one that is flexible, so you can feel stress, excitement or sadness and then come back to a steady baseline. The phrase has become popular in wellbeing circles, and it describes something simple: helping your body notice that it is safe so that it can stand down. You can explore related topics in our Health hub, including breathing and NSDR, and in our guide to stress management.

Your autonomic nervous system

The autonomic nervous system runs the parts of your body you don’t have to think about, such as heart rate, breathing, digestion and body temperature. It has two main branches. The sympathetic branch is often called “fight or flight”: it speeds up your heart and sends energy to your muscles. The parasympathetic branch is often called “rest and digest”: it slows your heart, supports digestion and helps your body recover. [7] The two branches work together all day, like an accelerator and a brake. The Cleveland Clinic video in Videos explains this clearly.

The stress response

When you face a challenge, your body releases stress hormones such as adrenaline and cortisol. Your heart beats faster, your breathing quickens and your muscles tense, ready for action. This is a healthy response and it helps you meet deadlines, react quickly and stay alert. The World Health Organization describes stress as a natural human response that prompts us to address challenges and threats, and notes that everyone experiences it to some degree. [8] The difficulty comes when the stress response stays switched on for long periods. The National Institute of Mental Health notes that long-term stress can affect sleep, mood, digestion and the immune system. [9] Sharon Horesh Bergquist’s TED-Ed lesson, in Videos, shows how this works in the body.

Signs your system is on high alert

Everyone is different, but common signs that your nervous system is stuck in a stressed state include:

• Feeling wired, restless or on edge, even when nothing is wrong.
• Shallow, fast breathing or holding your breath.
• Tight shoulders, jaw or stomach.
• Trouble falling or staying asleep.
• Being easily startled, irritable or overwhelmed.
• On the other side, feeling flat, numb, foggy or shut down.

Noticing these signs is the first step. Once you can spot them, you can choose a practice that helps you settle.

The window of tolerance

The “window of tolerance” is a phrase coined by psychiatrist Dr Dan Siegel. It describes the zone where you can handle life’s ups and downs while still thinking clearly and feeling connected. Above the window, you may feel anxious, angry or overwhelmed. Below it, you may feel numb, tired or switched off. Stress, poor sleep and difficult experiences can narrow the window, while rest, support and regular calming practice can widen it. The NHS video from Sussex Partnership, in Videos, explains the idea in a few minutes. Many people find it helpful simply to ask, “Am I in my window right now?”

Polyvagal theory

Polyvagal theory was developed by Dr Stephen Porges, a psychiatry researcher. It describes three broad states of the nervous system: a calm, socially engaged state; a mobilised, fight-or-flight state; and a shutdown or “freeze” state. It suggests that we are constantly scanning, below conscious awareness, for cues of safety and danger, which Porges calls neuroception. [10] Therapist Deb Dana has turned these ideas into practical exercises for everyday life, and her short introduction is in Videos. Polyvagal theory is one of several ways of describing the nervous system, and many people find its language a helpful way to make sense of their reactions.

The vagus nerve

The vagus nerve is the longest cranial nerve. It runs from the brainstem through the neck to the heart, lungs and digestive system, and it carries much of the parasympathetic “rest and digest” signal. [11] About 80% of its fibres carry information from the body up to the brain. [12] This two-way link is one reason why slow breathing, humming and other gentle practices can help you feel calmer. Our Vagus Nerve Reset guide walks you through seven gentle exercises, and the Cleveland Clinic’s short video in Videos shows five simple ways to try.

Breathing

Breathing is the part of the autonomic nervous system you can easily control, which makes it one of the quickest ways to calm your body. Slowing your breathing to around six breaths a minute, and breathing out for longer than you breathe in, tends to slow the heart and support the parasympathetic branch. A 2022 meta-analysis found that voluntary slow breathing increased heart rate variability, a marker of a flexible nervous system. [1] A systematic review also linked slow breathing with greater relaxation and comfort and less anxiety. [13] Try breathing in through your nose for a count of four and out for a count of six, for five minutes. Our Breathwork guide and Breathing page cover many more techniques.

Cyclic sighing

Cyclic sighing is a simple pattern: breathe in through your nose, take a second short breath in to fill your lungs, then breathe out slowly and fully through your mouth. In a Stanford study, people who practised cyclic sighing for five minutes a day for a month had a greater improvement in mood and a larger drop in breathing rate than people who practised mindfulness meditation, although both helped. [2] Stanford Medicine’s 90-second video, in Videos, shows you how. Many people use one or two sighs whenever they notice tension building.

Relaxing the body

Your body and mind talk to each other in both directions, so relaxing your muscles can calm your mind as well. The US National Center for Complementary and Integrative Health describes relaxation techniques such as progressive muscle relaxation, guided imagery, body scans and breathing exercises as ways to produce the body’s natural relaxation response. [14] A randomised study found that progressive muscle relaxation, deep breathing and guided imagery all increased feelings of relaxation, compared with a control group. [15] The Hospital for Special Surgery’s guided session, in Videos, is a good place to start. Our Relaxation guide has step-by-step instructions.

Movement and exercise

Movement uses the energy that the stress response creates and helps the body complete the cycle. The World Health Organization recommends that adults do at least 150 to 300 minutes of moderate activity a week and notes that regular activity can reduce symptoms of depression and anxiety. [3] Walking, dancing, swimming and cycling all count. Gentler options such as yoga and qi gong combine movement with slow breathing. A meta-analysis found that yoga was associated with lower evening cortisol and lower resting heart rate. [16]

Nature

Time outdoors is one of the simplest ways to help your system settle. In a study of city dwellers, spending 20 to 30 minutes in a place that gave them a sense of nature lowered the stress hormone cortisol. [4] You don’t need a forest: a park, a garden, a tree-lined street or a view of the sky can all help. Leaving your phone in your pocket and paying attention to sounds, colours and smells makes the time even more restful.

Connection with others

Humans are social, and a warm voice, a kind face or a hug are some of the strongest signals of safety. A large meta-analysis of 148 studies found that people with stronger social relationships had a 50% greater likelihood of survival over the study periods. [6] Day to day, calling a friend, sharing a meal, playing with a pet or singing with others can all help your nervous system settle. Our Relationships hub has ideas for building closer connections.

Sleep and rest

Sleep is when your body does much of its repair work. The US National Heart, Lung, and Blood Institute notes that sleep supports mood, learning and physical health, and that ongoing sleep loss can affect how you handle stress. [5] A regular sleep schedule, a cool, dark room and a gentle wind-down routine all help. During the day, short periods of deep rest such as NSDR (non-sleep deep rest) or yoga nidra can help you recharge. Ally Boothroyd’s ten-minute yoga nidra is in Videos.

Somatic approaches

Somatic approaches work through the body rather than through talking alone. Somatic Experiencing, developed by Dr Peter Levine, helps people notice body sensations gently and release stress at their own pace. In a randomised trial with 63 people, Somatic Experiencing reduced trauma symptoms compared with a waiting list. [17] Peter Levine’s conversation on regulating your nervous system is in Videos. Other body-based practices include Havening, which uses soothing touch, and EFT tapping.

Heart rate variability

Heart rate variability (HRV) is the natural variation in time between your heartbeats. A higher HRV at rest is generally a sign of a flexible, responsive nervous system. Many smartwatches now estimate HRV, and some people use HRV biofeedback, breathing in time with a guide to find their best breathing rate. Researchers describe how breathing at around six breaths a minute creates a resonance between heart rate and breathing that can strengthen the body’s calming reflexes. [18] HRV is best used as a gentle guide to your trends over weeks, rather than a daily score to worry about.

A simple 4-week plan

Week 1: Notice. Watch the explainer videos and jot down when you feel wired, steady or flat.

Week 2: Breathe. Practise five minutes of cyclic sighing or slow breathing each day.

Week 3: Move and rest. Add a daily walk, ideally outdoors, and one session of relaxation or NSDR.

Week 4: Connect. Plan regular time with people who help you feel at ease, and keep the practices that worked best.

How self-help methods fit in

Breathwork, relaxation, yoga and mindfulness are some of the most studied ways to help your nervous system settle. Somatic Experiencing works directly with body sensations, and our Vagus Nerve Reset guide brings together gentle exercises you can do anywhere. Many people also enjoy meditation, qi gong and calming sound practices. You can see every method we cover in the full list above.

Frequently asked questions

What does it mean to regulate your nervous system?

It means helping your body move from a stressed, on-alert state back to feeling calm and steady. A regulated system is flexible, not always calm.

How can I calm my nervous system quickly?

Slow breathing with a longer out-breath, or a few cyclic sighs, can help within minutes. In a Stanford study, five minutes of cyclic sighing a day improved mood. [2]

What is the window of tolerance?

A term coined by Dr Dan Siegel for the zone where you can handle stress while still thinking clearly. Above it you feel overwhelmed; below it you feel numb or shut down.

What is polyvagal theory?

A theory by Dr Stephen Porges describing three nervous system states: calm and connected, fight or flight, and shutdown. [10]

What does the vagus nerve do?

It carries much of the parasympathetic “rest and digest” signal between the brain, heart, lungs and gut. [11]

How long does it take to regulate your nervous system?

A calming practice can help within minutes. Building a steadier baseline usually takes a few weeks of regular practice, rest and support.

Does exercise help nervous system regulation?

Yes. Regular physical activity supports mental health and can reduce symptoms of anxiety and depression. [3]

The best videos on nervous system regulation

Hand-picked and checked one by one: Cleveland Clinic, TED-Ed, Stanford Medicine, an NHS trust, Deb Dana, Peter Levine and more.

Understanding your nervous system

Calming practices for right now

Building steadiness over time

Books on nervous system regulation

Free resources

Experts to follow

Get help

If you have new, strong or lasting symptoms, such as chest pain, a racing heart or trouble sleeping for weeks, please see your doctor.

Find a therapist or counsellor

• US and Canada: Psychology Today (US) and (Canada) directories.
• UK: BACP therapist directory.
• Australia: APS Find a Psychologist, and Relationships Australia for couple and family services.
• Elsewhere, including Europe and India: ask your doctor or local health service for a referral, and check that anyone you see is registered or accredited where you live.

This hub is for information, not a substitute for medical or psychological care.

Sources

1. Laborde et al. (2022), Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and a meta-analysis, Neuroscience and Biobehavioral Reviews 138:104711
2. Balban et al. (2023), Brief structured respiration practices enhance mood and reduce physiological arousal, Cell Reports Medicine 4(1):100895
3. World Health Organization, Physical activity fact sheet
4. Hunter, Gillespie & Chen (2019), Urban nature experiences reduce stress in the context of daily life based on salivary biomarkers, Frontiers in Psychology 10:722
5. National Heart, Lung, and Blood Institute (NIH), Sleep deprivation and deficiency
6. Holt-Lunstad, Smith & Layton (2010), Social relationships and mortality risk: a meta-analytic review, PLoS Medicine 7(7):e1000316
7. LeBouef, Yaker & Whited, Physiology, Autonomic Nervous System, StatPearls (NIH National Library of Medicine)
8. World Health Organization, Stress: questions and answers
9. National Institute of Mental Health, I’m so stressed out! fact sheet
10. Porges (2009), The polyvagal theory: new insights into adaptive reactions of the autonomic nervous system, Cleveland Clinic Journal of Medicine 76(Suppl 2):S86-S90
11. Kenny & Bordoni, Neuroanatomy, Cranial Nerve 10 (Vagus Nerve), StatPearls (NIH National Library of Medicine)
12. Breit et al. (2018), Vagus nerve as modulator of the brain-gut axis in psychiatric and inflammatory disorders, Frontiers in Psychiatry 9:44
13. Zaccaro et al. (2018), How breath-control can change your life: a systematic review on psycho-physiological correlates of slow breathing, Frontiers in Human Neuroscience 12:353
14. National Center for Complementary and Integrative Health (NIH), Relaxation techniques: what you need to know
15. Toussaint et al. (2021), Effectiveness of progressive muscle relaxation, deep breathing, and guided imagery in promoting psychological and physiological states of relaxation, Evidence-Based Complementary and Alternative Medicine 2021:5924040
16. Pascoe, Thompson & Ski (2017), Yoga, mindfulness-based stress reduction and stress-related physiological measures: a meta-analysis, Psychoneuroendocrinology 86:152-168
17. Brom et al. (2017), Somatic Experiencing for posttraumatic stress disorder: a randomized controlled outcome study, Journal of Traumatic Stress 30(3):304-312
18. Lehrer & Gevirtz (2014), Heart rate variability biofeedback: how and why does it work?, Frontiers in Psychology 5:756

Written by Saj Ali. Last updated 4 November 2026. Spotted an error? Tell us and we will fix it.