After rediscovering the importance of a more conscious, diaphragmatic breath, the next step is to rediscover nasal breathing.
Nasal breathing is not a trend nor an advanced technique: it is the physiological way our body is designed to breathe. And in recent years, science has begun to confirm what ancient traditions and body-based practices have long intuited.
Why Breathing Through the Nose Makes a Difference
The nose is not just an “air passage.” It is an active organ with specific functions:
- It filters the air from dust and pathogens
- It warms and humidifies the air before it reaches the lungs
- It produces nitric oxide (NO), a key molecule for cardiovascular and respiratory health
Studies published in the American Journal of Physiology and Frontiers in Physiology show that nasal breathing, compared to mouth breathing, is associated with:
- greater activation of the parasympathetic nervous system
- reduced resting diastolic blood pressure
- better regulation of breathing and heart rate
Nitric oxide produced in the paranasal sinuses, when we breathe through the nose, improves oxygen distribution in the lungs and promotes vasodilation. Mouth breathing, on the other hand, completely bypasses this mechanism.
Nasal Breathing and the Nervous System
One of the most interesting aspects concerns the relationship between nasal breathing and the brain.
Research published in the Journal of Neuroscience indicates that nasal breathing:
- modulates brain wave activity
- influences memory, attention, and emotional regulation
- promotes states of calm alertness compared to mouth breathing
One study observed that nasal breathing is associated with better memory consolidation, while mouth breathing reduces this effect. This suggests that how we breathe can influence not only the body, but also cognitive functions.
Open Mouth, Short Breath: Signals to Listen To
Breathing predominantly through the mouth—especially at rest—can be associated with:
- dry mouth and throat irritation
- fatigue and difficulty concentrating
- increased tension in the neck and chest
- poorer sleep quality and snoring
This is not a matter of “fault,” but of habit. Stress, poor posture, and fast-paced lifestyles easily push us toward rapid, mouth-based breathing, which over time becomes automatic.
The good news is that the body can relearn.
A First Practical Step: Conscious Nasal Breathing Exercise
Before introducing more complex breathing rhythms (such as 4-4-8 or 4-7-8), it is useful to stabilize a simple and sustainable foundation.
Exercise: Nasal Breathing with Prolonged Exhalation
- Sit or lie down in a comfortable position
- Inhale through the nose for 4 seconds, without forcing
- Exhale slowly through the nose for 6 seconds
- Keep the rhythm smooth, without holding the breath
- Duration: 5–10 minutes
A slightly longer exhalation promotes parasympathetic activation and helps the body “trust” nasal breathing.
Studies on Heart Rate Variability show that this type of breathing improves cardiac coherence and reduces physiological markers of stress.
Breathing Through the Nose Is a Daily Choice
Nasal breathing does not require long sessions or special tools. It is a choice you can bring into:
- walking
- moments of pause
- working or studying
- before going to sleep
It does not mean “never breathing through the mouth” (during intense effort it can happen), but rather returning to the nose as the main reference at rest and during light activities.
Conclusion
Breathing through the nose is one of the simplest and most powerful ways to make breathing more functional. There is no need to change everything at once: it is enough to begin observing, slowing down, and consciously choosing the right pathway.
Next month, we will explore how breathing can become a direct tool to regulate stress and the nervous system, integrating rhythm, awareness, and physiology.
One breath at a time.
