So you have been to one of our yoga classes – chair yoga or mat yoga at a retreat, and you have heard a dozen times, “breathe in through the nose, out through the nose.” It can feel like an odd rule, especially if you’re used to gulping air through your mouth when you’re out of breath. But there’s a real reason yoga sticks to nasal breathing – well almost all the time. And we reckon it’s worth you have a sound understanding of why.
It’s the Opposite of What You Might Think
To clear up the confusion first: in yoga, you generally breathe through your nose, not your mouth. Mouth breathing shows up only in a handful of specific techniques, like Lion’s Breath (where you stick your tongue out and exhale with a “ha” sound) or some cooling breaths in hot weather. Outside of those special cases, nose breathing is the default for almost every style of yoga, from a gentle stretch class – including Chair Yoga, to more intense flows.
The Nose Does More Than You Realise
Your nose isn’t just a hole for air to pass through; it’s doing a lot of quiet work:
- It filters the air. Tiny hairs and mucus catch dust, pollen, and other particles before they reach your lungs.
- It warms and humidifies the air. By the time air reaches your lungs, it’s closer to body temperature and less dry, which is gentler on your airways.
- It slows you down. Nostrils are naturally narrower than your mouth. Air moves through them more slowly. This naturally paces your breath, which is a big part of why yoga feels calming.
It Triggers Your Body’s “Calm Down” Switch
Slow, steady nasal breathing activates your parasympathetic nervous system. This part of your body is responsible for rest, digestion, and recovery. Mouth breathing, especially fast mouth breathing, tends to do the opposite. It signals your body that something urgent is happening, which can keep you in a slightly more alert, stressed state.
This is a big reason nasal breathing is baked into yoga. The physical postures matter, but a huge part of yoga’s benefit comes from teaching your nervous system how to settle down. Breathing through your nose is one of the simplest tools for that.
It Helps You Move Better, Too
Nasal breathing naturally encourages deeper, slower breaths that engage your diaphragm (the big muscle under your lungs) rather than shallow breaths that just move your chest and shoulders. Diaphragmatic breathing helps stabilise your core, which makes balance poses and transitions between postures noticeably smoother.
There’s also a practical side. Keeping your mouth closed keeps your attention inward. It’s harder to chat, sigh dramatically, or get distracted when your breath has a steady rhythm running through your nose.
A Quick Nod to Science
Research on nasal breathing has found it can improve oxygen uptake and is linked to lower stress markers compared to mouth breathing. Nitric oxide, a compound produced in your sinuses, also gets carried into your lungs when you breathe through your nose, and it helps open up blood vessels and airways. None of this happens when you breathe through your mouth.
When Mouth Breathing Does Show Up
There are a few exceptions worth knowing:
- Lion’s Breath (Simhasana): A forceful mouth exhale, tongue out, used to release tension or tightness in the face and throat.
- Sitali and Sitkari (cooling breaths): You inhale through a curled tongue or clenched teeth, which does involve the mouth, as a way to cool the body down.
- Some vigorous vinyasa flows: If you’re genuinely out of breath and can’t get enough air through your nose, it’s better to breathe however you need to, rather holding your breath or panicking. The nose-only rule is a guideline, not a punishment.
What If Nose Breathing Doesn’t Work For You?
The nose-breathing guideline is genuinely helpful, but it’s not a rule that should override your comfort or safety. There are a few common situations where it makes total sense to breathe through your mouth instead — and any good teacher will tell you the same:
A blocked or congested nose. If you’re dealing with a cold, allergies, or a structural issue like a deviated septum, forcing air through a blocked nostril just adds strain and takes your attention away from the practice. Breathe through your mouth for as long as you need to. Your body will thank you more for getting oxygen easily than for following a technique perfectly.
Trauma connected to nasal breathing. For some people, breathing through the nose can bring up difficult associations. This can come from a range of experiences, including medical procedures, panic attacks, or other personal history. If this applies to you, there’s no obligation to push through it. Mouth breathing is an option. Yoga is meant to feel safe; it should never recreate distress.
Habitual mouth breathers. If you naturally breathe through your mouth day-to-day, switching to nose-only breathing for an entire class can feel unnatural, effortful, or even a little panicky, especially in more physically demanding poses. That’s completely normal and not a sign you’re “doing yoga wrong.” It’s fine to ease into it gradually. Try nose breathing during the calmer parts of a class (like seated stretches or savasana) and allow yourself to breathe through your mouth during more strenuous poses until it starts to feel more natural over time.
The bigger goal in yoga is a breath that’s steady and doesn’t feel forced, whatever route it’s coming through. If nose breathing ever feels like a source of stress rather than a source of calm, it’s defeating the purpose. Comfort and safety always come before technique.
The Bottom Line
Nose breathing in yoga isn’t an arbitrary tradition. It filters and warms the air you breathe, slows your breath down, calms your nervous system, and helps you move with more control. Next time your teacher reminds you to breathe through your nose, you’ll know it’s not just a technicality. It’s actually doing a lot of the work behind why yoga leaves you feeling calmer than when you walked
