The Surprising Link Between How You Breathe and How You Age
I have started wearing nose strips to bed. The little ones that stretch across the bridge of your nose.
My husband Bill snores, and somewhere in the middle of paying attention to his breathing, I started paying closer attention to my own. Here is what I noticed. During the day, I can control how I breathe. I catch myself, close my mouth, and let the air move through my nose. At night I lose that control, and if you spend eight hours breathing through your mouth, it adds up.
So I went back into the research, and the more I read, the more it confirmed something I have taught for years. The way you breathe has a real effect on your health, and on how you age.
This post is adapted from Yoga for Longevity, my podcast where I share therapeutic yoga tools for healthy aging. I’m Mikah Horn, yoga therapist and founder of Lifelong Yoga Online, a membership designed especially for adults 50+. If you’re looking for a way to put the things you learn in this episode into practice, you can explore it free for 7 days, with gentle classes for joint health, healthy hips, posture, and more.
What Nasal Breathing Actually Does for Your Body
We tend to treat the nose as a passageway, a place for air to move through on its way to the lungs. It is closer to a piece of built-in equipment.
When you inhale through your nose, the air is filtered, warmed, and humidified before it ever reaches your lungs. Particles and irritants get trapped. Cold, dry air arrives at body temperature and moisture. Your mouth does none of this conditioning, which is why mouth breathing delivers unprocessed air straight into your airways.
The piece that gets less attention is nitric oxide. Your nasal passages and sinuses release this gas as you breathe, and it does real work. It widens blood vessels, improves circulation, and helps your lungs pull more oxygen from each breath. It also has antimicrobial properties, which is part of how your sinuses stay healthy. Breathe through your mouth and you bypass the whole system.
Here is a detail I find genuinely satisfying. Humming increases the nitric oxide your nose produces, and not by a small margin. It is a striking jump. So the soft, bee-like humming breath some of you have practiced with me is doing something measurable in your body, not only something calming.
How Mouth Breathing Affects Your Sleep
This is where it surfaces most for the people I work with. A dry mouth in the morning. Waking once or twice in the night. Snoring you may not know about until someone else mentions it. It is easy to hand all of that to age, but much of it traces back to how you breathe while you sleep.
Mouth breathing at night is associated with snoring, more fragmented sleep, and even those extra trips to the bathroom, because broken sleep changes the way your body manages fluid overnight. When breathing returns to the nose, a lot of that tends to settle.
That is the encouraging part. Mouth breathing is common, often unconscious, and unusually responsive to attention. Changing a lifelong habit is not always easy, but the change itself is simple.
Why Yoga Has Always Breathed Through the Nose
None of this is new. Yoga arrived at nasal breathing thousands of years ago, long before there was any way to measure a sinus gas or run a sleep study.
In the yogic view, the breath carries prana, the vital energy that animates the body. That is the root of the word pranayama: prana, life energy, and ayama, to draw out or extend. The nose is treated as the proper gateway for that energy, which is why nearly every classical breathing practice is done through the nose rather than the mouth.
What interests me is how much of that tradition holds up under a microscope. Nasal breathing supports slower, fuller, diaphragmatic breaths and moves you toward the parasympathetic, rest-and-recover side of your nervous system. The tradition described the effect. Modern physiology filled in the mechanism.
And when I ask my students what has changed the most for them, many of them do not name a pose. They name the breath. They use it to fall asleep, to steady themselves before a hard conversation or a medical appointment, to come down from a wave of anxiety. That is breath changing your state in real time, and it is one of the most practical tools yoga has to offer.
The Research on Right and Left Nostril Breathing
This is where the tradition steps past what science can currently confirm, and it is one of my favorite parts.
Yoga treats the two nostrils as different instruments. The right is solar, warming, and activating. The left is lunar, cooling, and calming. Alternate nostril breathing, nadi shodhana, translates as purifying the energy channels, and it works by breathing through one side at a time to balance the two.
Researchers have tested this directly, having people breathe through a single nostril while measuring heart rate, blood pressure, and oxygen consumption. The findings tend to lean in the direction the tradition predicted. Right nostril breathing nudges the body toward activation, with small rises in heart rate and blood pressure. Left nostril breathing tends to calm, and in some studies it lowered blood pressure.
These are small studies, mostly in young, healthy adults, and they do not all agree, so this is not settled science. What stays with me is that the pattern researchers keep finding echoes something yogis mapped centuries ago with no instruments at all. Some of this we can measure. Some of it is a lens we look through. Both can be true, and I am comfortable holding both.
One Small Breathing Shift to Start Today
All of this returns to awareness, which is the real substance of yoga.
This week, start noticing. Are you breathing through your nose right now, or your mouth? Check in while you drive, while you walk, while you concentrate on something. When you catch yourself mouth breathing, close your lips and let the breath return to the nose. Then carry it into your practice. Let the nose lead, and let the breath stay slow, full, and easy.
That is the entire assignment. Notice, and shift when you can, again and again, over time. It is a small change with a long reach.
PS. If you want a place to practice breathing like this, it is built into every class inside Lifelong Yoga Online. You can try it free for 7 days. Come breathe with me.
More to explore:
– Try Lifelong Yoga Online free for 7 days
– The book that started my rabbit hole: Breath by James Nestor
