Three Breaths That Changed My Nervous System

I want to tell you something that took me an embarrassingly long time to understand: your breath is the one part of your autonomic nervous system that you can consciously control.

Your heart rate, your digestion, your blood pressure — these all happen without your input, and largely without your ability to change them directly. But your breath sits right on the border between automatic and intentional. It runs on its own when you're not thinking about it, and the moment you decide to pay attention, you can slow it, deepen it, shape it. And because breath and nervous system are so tightly linked, when you change one, you change the other.

That is not a small thing. That is, in fact, enormous.

I came to breathwork sideways — through yoga, through exhaustion, through living in a nervous system that runs hotter than most and desperately needed somewhere to go. I wasn't looking for a spiritual practice or a performance technique. I was looking for something that would work when I was lying in bed at 2am with my thoughts ricocheting and my body convinced, despite all evidence, that something terrible was about to happen.

I found three breaths that helped. I still use all three. Here they are.

Your breath sits right on the border between automatic and intentional. When you change one, you change the other. That is not a small thing.

Breath One

This is the one I reach for first, because it is the simplest and it works almost immediately. The principle is disarmingly straightforward: make your exhale longer than your inhale.

During inhalation, your heart rate rises slightly. During exhalation, the vagus nerve releases a neurotransmitter that slows it back down. When you extend the exhale, you spend more time in that slowing-down phase — and your nervous system follows. The research on this is solid and has been replicated many times: slower exhales activate the parasympathetic nervous system, reduce cortisol, and shift the body out of fight-or-flight. ^[1]

I first noticed it working properly when I was sitting in a car park before a particularly stressful appointment, heart hammering, trying everything I'd been told about "just relaxing." Nothing was working — until I started counting. Inhale for four. Exhale for six. Then eight. My hands were shaking, and then gradually they weren't.

How to practise:

Find a comfortable position — sitting, lying, doesn't matter. Breathe in through your nose for a count of 4. Breathe out slowly through your mouth or nose for a count of 6 to 8. Repeat for as long as you need — there is no minimum or maximum.

When you need it: Anxiety, pre-event nerves, the middle of the night, any moment your body is running faster than the situation warrants.

Adaptable? Completely. If 4 in / 6 out feels too long, start with 3 in / 5 out. The ratio matters more than the specific counts.

No experience needed. No equipment. Can be done entirely invisibly in public.

Breath Two

Box breathing — four equal sides, like drawing a square with your breath — has been used by military personnel, surgeons, and emergency responders to maintain focus and physiological calm under acute stress. I find that recommendation both reassuring and mildly amusing, because I first used it to get through a supermarket on a busy Saturday.

The structure is: inhale, hold, exhale, hold — all for the same count. The holds are what make this one different from the extended exhale. That moment of suspension, particularly after the exhale, creates a brief reset — a tiny pause in the nervous system's usual chatter where something can settle. Research has found that box breathing reduces state anxiety and negative emotion, and produces measurable improvements in physiological arousal. ^[2]

I came to love it not just for the calming effect but because the counting gives my AuDHD brain something specific to do. It's impossible to catastrophise and count simultaneously — at least for the duration of the breath. And sometimes, getting through the duration of the breath is all you need.

How to practise:

Breathe in through your nose for a count of 4. Hold at the top for a count of 4. Breathe out slowly for a count of 4. Hold at the bottom — lungs empty — for a count of 4. That is one full box. Repeat 4 to 8 cycles.

When you need it: Overwhelm, sensory overload, needing to focus before a difficult task or conversation, or any time you feel scattered and need something to anchor to.

Adaptable? Yes. If 4 counts feels uncomfortable, use 3. If you'd like to increase the calming effect, try a longer exhale side — 4 in, 4 hold, 6 out, 4 hold — which blends this with the extended exhale technique.

Particularly useful for AuDHD brains — the structure and counting give the mind something to do while the body settles.

Breath Three

This one came to me through research rather than instinct, and it's the one I find most surprising — because it looks almost too simple to work, and yet it is arguably the fastest-acting of the three.

Your body already knows this breath. You do it involuntarily several times an hour without realising — a double inhale followed by a long, slow exhale. It's what you do when you've been holding tension for too long and your body forces a release. Researchers at Stanford have been studying it, and a 2023 randomised controlled trial found that just five minutes of daily cyclic sighing was associated with greater improvements in positive mood and reductions in physiological arousal than box breathing, extended exhale breathing, or mindfulness meditation. ^[3]

The double inhale fully inflates the tiny air sacs in the lungs that partially collapse under stress, and the long exhale that follows then expels a larger-than-usual volume of carbon dioxide — which is directly linked to the feeling of calm that follows. Your body has been doing this for you all along. You're simply choosing to do it on purpose.

The first time I tried it deliberately, I felt the difference within two or three cycles. It's the breath I use when I need to come down fast — after a meltdown, after a panic response, after a hard conversation. It doesn't fix what caused it. But it brings me back into my body when I've been knocked out of it.

How to practise:

Inhale slowly through your nose until your lungs feel full. Then take one more short, sharp sniff through your nose — a "top-up" inhale — to fully expand the lungs. Then exhale slowly and completely through your mouth, letting it be long and audible if that feels natural. Repeat for 5 to 10 cycles, or as many as you need.

When you need it: After intense emotional experiences, post-meltdown, when you feel physically wired and can't come down, or as a daily five-minute practice for mood regulation.

Adaptable? Very. The second inhale can be as small as a gentle sip of air — it doesn't need to be dramatic. The exhale can be through the nose if the mouth feels wrong. Follow what your body tells you.

The fastest-acting of the three. Takes less than a minute to feel the effect.

A FEW THINGS WORTH SAYING

These three techniques are not cures. They are tools. They will not resolve the thing that is causing the stress, the anxiety, the overwhelm. What they will do is give your nervous system a path back to a state where you can think clearly, make choices, access your own resources. They are a bridge, not a destination.

They also work best when you practise them before you need them. If you've never done box breathing and you're in the middle of a panic response, it's harder to remember what to do. Five minutes a day when you're calm builds the muscle memory so it's available when you need it most. This is one reason breathwork features in every Undod Yoga session — not as a warm-up to the "real" practice, but as the practice itself, learned in a low-stakes environment so it's accessible in a high-stakes one.

And finally: these techniques are accessible. You don't need a mat. You don't need a quiet room, though one helps. You don't need experience, a particular body, or any prior knowledge of yoga or breathwork. You need only a breath — which, if you're reading this, you already have.

Start there. Everything else can wait.

— India