Here's a question worth sitting with for a moment: when you're relaxing, reading, or going about your day, are you breathing through your nose — or your mouth?

For many of us, the honest answer is: we're not sure. Breathing is so automatic that we rarely notice it at all. But this one small detail — which opening you use to bring air into your body — turns out to matter quite a lot. And the difference becomes even more meaningful as we get older.

In this third article of the Breathe Well series, we're taking a warm, curious look at nose breathing: what it does, why it's so valuable, and how you can gently begin making it a more natural part of your day.

Your Nose Is a Marvel of Design

The human nose is a remarkable piece of natural engineering. It isn't just a passageway — it's an active, intelligent filter and processor that prepares the air you breathe before it ever reaches your lungs. Here's what it quietly does with every single breath:

• Filters the air — tiny hairs called cilia inside your nostrils trap dust, pollen, and other particles before they travel deeper into your airways
• Warms the air — your nose heats incoming air to close to body temperature, making it gentler on your lungs and airways
• Humidifies the air — moisture is added to each breath, helping to keep your throat and airways from drying out
• Produces nitric oxide — this is perhaps the most surprising one; your nasal passages produce a molecule called nitric oxide, which helps open blood vessels and supports healthy circulation throughout the body
• Slows the breath naturally — breathing through your nose creates a small amount of natural resistance, which encourages a slower, deeper breathing rhythm

Your mouth, by contrast, does almost none of these things. It's a wonderful tool for eating, speaking, laughing, and for breathing hard during vigorous activity — but as a default breathing route for everyday life, it simply wasn't designed for that job.

Nose Breathing vs. Mouth Breathing — A Simple Comparison

To understand why the difference matters, here's a gentle side-by-side look at what each type of breathing tends to offer:

Looking at it laid out this way, the difference is quite striking — and yet most people have never given it a second thought. That's entirely understandable. Now that you know, though, you have a wonderful opportunity to make a small but meaningful shift.

Why Mouth Breathing Becomes More Common After 60

If you've noticed that you tend to breathe through your mouth — especially at night — please know that this is very common among older adults, and it's nothing to feel concerned or embarrassed about. Several perfectly natural factors can contribute to it:

Nasal congestion and dryness

As we age, the mucous membranes inside the nose can become drier and less efficient. Seasonal allergies, a history of colds, or even dry indoor air can cause mild but persistent nasal congestion that makes nose breathing feel effortful. When the nose feels even slightly blocked, the mouth naturally takes over.

Habit and posture

If you've been a mouth breather for many years, it has simply become your default. And as we discussed in Part 1, posture changes over time — a slightly forward head position or rounded shoulders — can make nasal breathing feel less automatic.

Reduced nasal airflow

The nasal passages themselves can narrow slightly with age, and structures inside the nose may shift a little over the years. This doesn't mean nasal breathing becomes impossible — it may simply mean it takes a little more conscious attention to return to it.

How to Gently Encourage More Nose Breathing

The good news is that you don't need to force anything or white-knuckle your way through any breathing exercises. Returning to nose breathing is a gentle, gradual process. Here are some easy, practical ways to begin:

Start with awareness

Simply begin noticing which way you're breathing throughout the day. Set a soft reminder on your phone — or use natural cues like sitting down with a cup of tea, or settling into your favourite chair — to check in with your breath. No judgment, just observation.

Practise nose breathing when you're relaxed

The easiest time to start is when you're already calm: reading, watching television, sitting quietly in the garden. In those moments, gently close your mouth and breathe in and out through your nose. See how it feels. Most people find it surprisingly comfortable once they try.

Keep your nasal passages clear and comfortable

If congestion makes nose breathing difficult, a gentle saline nasal rinse (widely available at pharmacies) can help keep your nasal passages clear and moist. Staying well hydrated throughout the day also supports the mucous membranes inside the nose.

Be mindful during gentle activity

During slow walks or gentle stretching, try to keep your breathing through your nose. You may need to slow your pace slightly at first — and that's perfectly fine. The body adapts beautifully with a little patience and consistency.

A Simple Nose Breathing Practice to Try Today

If you'd like a structured moment of nose breathing to try right now, here is a simple two-minute practice. It's gentle, unhurried, and suitable for anyone:

One Small Shift, One Breath at a Time

It's quite remarkable, really, that something as simple as closing your mouth and breathing through your nose can have such a wide-reaching influence on how your body feels. No equipment, no cost, no effort beyond a little gentle awareness.

If nose breathing feels new or slightly unfamiliar at first, be patient with yourself. The body is wonderfully adaptable. With a little practice and consistency, nasal breathing can become your natural, comfortable default — and you may find that your energy, your sense of calm, and even your sleep begin to reflect that quietly powerful shift.