Most of us are breathing wrong. Not dramatically wrong — not in a way that sends up alarm signals or requires a diagnosis. Just quietly, habitually, insufficiently wrong. We take shallow breaths into the upper chest. We breathe through our mouths. We use a fraction of our lung capacity for years, even decades, and never notice — because the body is forgiving, and it compensates, until one day it cannot quite compensate as well as it used to.

The lungs, like every other system in the body, respond to use. And most of us are giving them very little of it.

Here is something that surprises people: you are almost certainly breathing more through one nostril than the other right now. Not because something is wrong — but because this is normal. The body runs what is called the nasal cycle, a rhythmic alternation in which the soft tissue inside one nostril swells slightly, directing more airflow through the other. This cycle shifts approximately every two to four hours. One nostril takes the lead, then the other. The body does this automatically, without our awareness or permission.

Why? The two nostrils are not simply duplicate passages. Research shows they have meaningfully different effects on the brain and nervous system. Studies conducted at the Patanjali Research Institute in India found that the right nasal passage, when dominant, is associated with increased sympathetic nervous system activity — alertness, energy, heightened cognitive function. The left nasal passage, when dominant, tends to activate the parasympathetic system — calm, rest, restoration (Telles et al., 2014). The nervous system and the breath are in perpetual, coordinated conversation.

Ancient yogic traditions understood this long before neuroscience confirmed it. Nadi Shodhana — alternate nostril breathing — is one of the foundational pranayama practices of yoga, used for centuries to balance the two hemispheres of the brain, calm the nervous system, and clear what the tradition calls the nadis, or subtle energy channels. The Sanskrit words mean “channel purification.” And the modern clinical evidence is beginning to match the ancient intuition.

A systematic review of 44 randomized controlled trials found that alternate nostril breathing provides high-level evidence of positive outcomes for the autonomic nervous system and the cardiopulmonary system — reducing blood pressure, improving heart rate variability, and enhancing respiratory function (Ghiya, 2017). A separate study found that after just one month of regular practice, participants showed improved oxygen flow and increased exhalation capacity, both markers of healthier lung function (WebMD/Healthline, citing clinical research).

How it Works

You use one hand — traditionally the right — with the index and middle fingers resting gently between the brows. The thumb closes the right nostril; the ring finger closes the left. You exhale fully through the left nostril. Then inhale through the left, close both, exhale through the right. Inhale right, close both, exhale left. That is one complete cycle. The breath is slow, deliberate, and full — not a shallow chest breath, but a breath that descends into the belly, fills the lower lungs, expands the ribcage.

And this is where the deeper conversation begins: lung capacity.

The lungs have a total capacity of roughly six liters in an average adult. In normal, quiet breathing, we use less than half a liter per breath — about eight percent of what is available to us. The lower lobes of the lungs, which are richest in blood vessels and most efficient for gas exchange, go largely unused in shallow breathing. Over time, the tissues of the lower lungs receive less circulation. The tiny air sacs called alveoli can begin to collapse in a process called atelectasis if they are not regularly inflated.

Deep breathing is not optional maintenance. It is exercise for the interior of the body — invisible on the outside, but as consequential as any movement you do. The diaphragm is a muscle. Like all muscles, it weakens with disuse and strengthens with consistent engagement. Pranayama practices, long deep breathing, even simple belly breathing done intentionally each day — these train the diaphragm, expand the alveoli, and support the lymphatic system, which depends partly on the pressure changes of deep breathing to move fluid through the body.

You do not have to practice formal alternate nostril breathing to begin reclaiming your breath. You can start simply: sit comfortably, place one hand on your belly, and breathe until you feel it rise. Do this for five minutes. Notice how different it feels from how you were breathing before you started.

Then, when you are ready, try the alternating practice. Four counts in. Hold for four. Eight counts out. Even one or two cycles will show you something about the texture of your own breath — where it catches, where it flows, where there is room you have not yet claimed.

Your lungs are waiting. They have capacity you have not visited in years. And every deep breath is a small homecoming.

Try this breathing technique and let me know what you learn.

🌸 References:

Ghiya, S. (2017). Alternate nostril breathing: A systematic review of clinical trials. International Journal of Research in Medical Sciences, 5(8), 3273–3286.

Telles, S., Sharma, S.K., & Balkrishna, A. (2014). Blood pressure and heart rate variability during yoga-based alternate nostril breathing practice and breath awareness. Medical Science Monitor Basic Research, 20, 184.

Hasegawa, M., & Kern, E. (1977). The human nasal cycle. Mayo Clinic Proceedings.

📚 Recommended Reading:

• Breath: The New Science of a Lost Art by James Nestor — A fascinating, deeply researched account of how breathing affects every system in the body, and how most modern humans are doing it wrong.

• The Healing Power of the Breath by Richard P. Brown, M.D. & Patricia L. Gerbarg, M.D. — A practical clinical guide to breathwork techniques including pranayama, with research-backed protocols for anxiety, depression, and chronic illness.

• Light on Pranayama by B.K.S. Iyengar — The classical, comprehensive guide to yogic breathing practices from one of the most respected yoga masters of the 20th century.