Anuloma Viloma TimerToday is Earth Day. The air in your lungs has been inside every living thing that has ever existed on this planet.
That is not a metaphor. It is atmospheric science.
The oxygen you just inhaled has been cycling through Earth’s biosphere for hundreds of millions of years. It was photosynthesised by algae in Precambrian oceans. It passed through the lungs of the first air-breathing fish. It was breathed by every human being who walked this planet before you, released back into the atmosphere, reconverted by forests, and inhaled again by something or someone else. The air is shared in a way that runs deeper than climate or ecology: it is physically inherited.
You are not just connected to the planet. You are a temporary passage for its atmosphere.
What Actually Happens When You Breathe
Here is the mechanism, because it is worth understanding on a day like this.
Plants absorb sunlight and carbon dioxide. Through photosynthesis, they convert that solar energy into glucose and release oxygen as a byproduct. You inhale that oxygen. Your mitochondria, the energy generators inside each of your cells, combust the oxygen against glucose to release the stored solar energy. That energy powers every thought and movement you make. Then you exhale carbon dioxide, which the plants absorb to start the cycle again.
You are running on sunlight. The oxygen is just the carrier. Every breath is a combustion event, and the fuel is billions of years of accumulated solar radiation.
On Earth Day, that feels worth sitting with for a moment.
Why Nadi Shodhana
Nadi Shodhana, alternate nostril breathing, is a 2,500-year-old pranayama practice from the Hatha yoga tradition. You close one nostril, inhale through the other. Then you switch and exhale. Then inhale through the same one. Switch and exhale. Repeat.
It sounds mechanical. Practised slowly, it is anything but.
The practice works through the nasal cycle, a physiological phenomenon that most people have never been told about. Your nostrils alternate dominance every 90 minutes, controlled by your autonomic nervous system. Right now, one nostril is slightly more open than the other. In roughly an hour and a half, that will reverse. This cycle runs continuously, synced to your brain hemisphere activity: the open nostril activates the opposite hemisphere.
Nadi Shodhana interrupts that automatic alternation and makes it conscious. You are not just breathing. You are deliberately engaging both sides of your brain, in sequence, at a pace you control.
Studies from Bangalore’s Swami Vivekananda Yoga Research Foundation and peer-reviewed work published in the International Journal of Yoga have measured the effects: lower perceived stress, improved spatial memory performance, and a significant increase in heart rate variability within the first session. The 2026 Wiley Stress and Health clinical trial on first responders found medium-to-large effect sizes for anxiety reduction after an eight-week Nadi Shodhana protocol.
It is not a relaxation technique in the colloquial sense. It is a nervous system intervention with 2,500 years of use and a growing body of peer-reviewed evidence.
Breathing on Purpose on the One Day That Matters
Earth Day tends to produce calls to action: plant something, reduce something, change something. Those are worth heeding. But there is also something valuable in the smaller act of sitting down today and breathing with attention.
The air you are breathing right now has passed through ancient forests that no longer exist. It has been inside bodies across the entire span of human history. It will keep cycling long after you are gone.
Nadi Shodhana is a way of meeting that fact consciously, rather than letting it pass unnoticed.
Two to five minutes. One nostril at a time.
Try It
The Anuloma Viloma Timer is a free iOS app that guides you through Nadi Shodhana at your own pace. No subscription necessary. Download free on the App Store and try one session today.
It does not require you to believe anything in particular about the breath. The physiology works regardless.
But on a day when the air itself is the point, it seems like a good time to pay attention to it.
Sources: Swami Vivekananda Yoga Research Foundation studies on Nadi Shodhana (IJOY); Shannahoff-Khalsa DS, “Lateralized Rhythms of the Central and Autonomic Nervous Systems,” International Journal of Psychophysiology, 1993; Werntz DA et al., “Alternating cerebral hemispheric activity and the lateralization of autonomic nervous function,” Human Neurobiology, 1983; Ghiya S, “Alternate Nostril Breathing: A Systematic Review of Clinical Trials,” International Journal of Research in Medical Sciences, 2017.