Breathe to recover

How simple breathing techniques can calm the nervous system and support health & performance

Breathing is not just about getting oxygen into the body. It is one of the few body functions that is both automatic and under our conscious control, which means we can use it as a direct “handle” on the nervous system.

When life, work, training, pain or stress keep us in a high-alert state, the body can struggle to fully recover. Good breathing habits can help shift us towards a calmer, more restorative state — supporting sleep, digestion, tissue repair, emotional regulation and readiness for activity.

The nervous system: accelerator and brake

Your autonomic nervous system helps regulate functions such as heart rate, blood pressure, breathing, digestion and recovery. It is often described in two broad branches:

The sympathetic nervous system is the “go” system. It helps us respond to challenge: running hard, dealing with pressure, or reacting to danger.

The parasympathetic nervous system is the “rest, digest and recover” system. It supports down-regulation: slower heart rate, better digestion, relaxation, sleep and repair.

Both systems are essential. The goal is not to be relaxed all the time. We need to be able to access intensity and respond to challenges. But health and performance depend on being able to switch gears: to respond to stressors as required, then return to a more relaxed state afterwards.

This is where breathing becomes powerful. Slow, controlled breathing practices have been shown to influence the autonomic nervous system and may help reduce stress and anxiety.

Why breathing affects how calm you feel

When you breathe quickly, shallowly, or mostly through the mouth — especially at rest — the body can receive signals that resemble stress. This may increase feelings of tension, alertness or breathlessness.

By contrast, slower breathing with a relaxed diaphragm can send a different message: “I am safe enough to recover.”

One reason is the relationship between breathing and heart rate. When we inhale, the heart rate naturally tends to rise slightly. When we exhale, it tends to fall. 

Slow breathing can also improve heart rate variability, or HRV. HRV reflects the variation between heartbeats and is often used as one marker of recovery and nervous system flexibility. For most people, this slow rhythm is roughly around five to six breaths per minute or one breath every 10-12 seconds, although the ideal rate varies from person to person.

Why this matters?

We all experience, to varying degrees, stress in our daily life, and exercise is also a physical stress (a useful one, but still a stress). Massage, mobility work, yoga, nutrition and sleep all help the body adapt to stress. Breathing can sit alongside these as a simple recovery habit.

When the nervous system is constantly switched on, you may notice:

• tight neck, shoulders, jaw or hip flexors

• restless sleep

• feeling wired but tired

• poor digestion

• elevated resting heart rate

• struggling to relax after evening training

• feeling breathless at easier paces

• difficulty absorbing hard sessions

Breathing well will not replace good sleep, fuelling, injury rehab or remove the consequence of wider lifestyle and environmental stressors. But it can make the body more receptive to other recovery methods, and help allow muscles to let go of tension.

Techniques to try

1. Simple belly breathing

Use this when you feel stressed, tense or unable to switch off.

• Sit or lie comfortably.

• Place one hand on your chest and one hand on your lower ribs or belly.

• Breathe in gently through the nose, letting the lower ribs and belly expand.

• Exhale slowly and softly.

• Avoid forcing big breaths.

• Think “quiet, low and slow.”

• Focus on feeling the movement of breathing in your hand on the lower ribs/belly not the hand on your upper chest.

• Try 3–5 minutes.

The NHS suggests this simple breathing exercise for stress using gentle breaths into the belly, breathing in and out steadily for around five minutes. 

2. Longer exhale breathing

Use this after running, after massage, before sleep, or when you want to down-regulate.

• Breathe in through the nose for 4 counts.

• Breathe out through the nose for 6–8 counts.

• Keep the breath smooth and comfortable.

This is a simple way to bias the body towards the “brake” rather than the “accelerator.”

3. Resonance breathing

Use this as a daily nervous-system training practice.

Breathe at roughly 5–6 breaths per minute. A simple version is:

• Inhale for 5-6 seconds.

• Exhale for 5-6 seconds.

• Continue for 5 minutes.

You can use a timer, metronome or breathing app, but it should feel calm rather than strained. A long breath does not have to be a big breath, keep it small.

4. 4-7-8 breathing

Use this before sleep or when your mind is racing.

Dr Andrew Weil popularised the 4-7-8 technique:

• Inhale through the nose for 4.

• Hold for 7.

• Exhale through the mouth for 8.

Dr Weil advises keeping the 4:7:8 ratio but speeding it up if holding the breath feels uncomfortable. 

If you dislike breath holds or find them uncomfortable, I would start gently: perhaps 4 in, 2 hold, 6 out, then build only if it feels easy.

5. Nasal breathing on easy runs

Use this carefully during low-intensity running.

• For an easy warm-up, recovery run or walk-jog, try breathing through the nose for short periods. This naturally encourages a lower intensity and may help you notice when your intensity is higher than intended. 

• Do not force nasal breathing during high-intensity efforts. If you need more air, breathe normally. The aim is awareness and efficiency, not restriction.

• James Nestor, author of Breath: The New Science of a Lost Art, has helped popularise the importance of nasal breathing and the idea that modern humans often breathe less well than they could. 

• For runners, learning to breathe more calmly and efficiently may help with perceived effort, pacing and recovery between sessions.

• One of the best-known modern systems in this area is The Oxygen Advantage, developed by Patrick McKeown. The Oxygen Advantage method focuses on functional breathing, including nasal breathing, lighter breathing and improving tolerance to carbon dioxide.

• Carbon dioxide is not just a waste gas. It plays an important role in breathing drive and oxygen delivery. If we habitually over-breathe, we may become more sensitive to carbon dioxide and feel the urge to breathe sooner or harder than necessary.

When to use breathing techniques

Breathing techniques are most useful when practised regularly, not just when you are already stressed.

Good times to practise include:

• Before bed.

• After a run.

• During and after sports massage.

• Before a race or event, to settle nerves.

• During stretching or yoga.

• Between work and evening training.

• When you notice jaw, shoulder or chest tension.

Even two to five minutes can be enough to change state. Start small.

For one week, try this:

• After finishing work or a run: 3 minutes of slow nasal breathing with a longer exhale.

• Before bed: 5 minutes of belly breathing or resonance breathing.

• During one easy run: include short nasal-breathing sections to keep the effort genuinely easy.

Notice what changes. Sleep? Muscle tension? Resting heart rate? Mood? Recovery? Breathlessness? Pacing? The goal is to give your body more chances to come out of stress mode and into recovery mode.

Cautions

Breathing work should feel calming, not panicky. Stop if you feel dizzy, tingly, faint or distressed.

Be especially cautious with breath holds or strong breathing techniques if you are pregnant, have cardiovascular disease, uncontrolled high blood pressure, panic disorder, asthma, COPD, a history of fainting, or any significant medical condition. In those cases, seek advice from a qualified health professional.

For most healthy people, gentle breathing practices are low risk and highly accessible. The key words are: gentle, regular, comfortable and useful.

Summary

You cannot recover well if your body never gets the signal that it is safe to recover.

Breathing is not magic, but it is a practical, evidence-informed way to influence the nervous system, reduce unnecessary tension and support the recovery that allows health and performance to improve.