Somewhere between the Himalayas and the mitochondria lies a peculiar truth: you are a self-heating, self-cleaning, semi-conscious pocket of the universe that breathes, blinks, and occasionally wonders what it’s doing here.

If that sentence made you feel oddly seen, congratulations, you’re already halfway to enlightenment. The other half involves a little thing called Tummo breathing, which, depending on who you ask, is either the ancient art of awakening the inner fire or the biological equivalent of giving your nervous system a very polite electric shock.

Tummo, in Tibetan, means “inner fire,” and it’s not a metaphor. The monks who practise it can literally sit in sub-zero temperatures wearing nothing but thin robes and melt the snow around them. The sceptics said, “That’s impossible.” The monks said nothing and simply kept steaming quietly.

Science, ever the party guest who insists on measuring the champagne bubbles, eventually arrived with thermometers. The results were unnervingly clear: core body temperatures rose by several degrees. Heart rate, metabolism, and brainwave patterns shifted. It seemed that through a peculiar rhythm of breathing and imagination, human beings could command their own internal thermostat.

Here’s how it works in less mystical terms: Tummo involves deep, rhythmic breathing, a kind of oxygen ballet where the inhalations are deliberate, the exhalations are complete, and the pauses in between are where the magic happens. During those pauses, breath held and mind focused, the body tilts into a controlled stress response. Adrenaline rises. Brown adipose tissue (the “good fat” that burns calories for heat) activates. The sympathetic nervous system hums like an awakened dragon.

And then there’s the visualisation: practitioners imagine a small flame at the navel, which grows brighter with every breath, sending warmth up the spine. What’s fascinating is that the brain, that overqualified lump of electrified tofu, doesn’t distinguish much between vivid imagination and physical experience. The body responds to the image as if it were real. Heat follows thought.

Meanwhile, on a much smaller stage, the subatomic theatre of your own cells, something equally marvellous is happening: autophagy.

Autophagy is biology’s version of cosmic recycling. It’s the process by which your cells take a good hard look at themselves and say, “Right, this mitochondrion has seen better days,” and proceed to dismantle it for parts. Old proteins are chewed up and rebuilt into new ones. Dysfunctional organelles are broken down and reassembled. It’s the ultimate in zero-waste living.

Scientists have observed that fasting, breathwork, and exercise can trigger autophagy, nudging cells into this elegant cleaning frenzy. When resources are scarce, the body becomes remarkably clever about using what it already has, rather like a university student making an elaborate dinner from half a tin of beans and optimism.

The two processes, Tummo and autophagy, might seem worlds apart: one steeped in mysticism, the other in molecular biology. But at their core, they express the same principle: transformation through intelligent stress. A little pressure, properly applied, doesn’t destroy the system; it evolves it.

Tummo turns the breath into fire. Autophagy turns decay into renewal. Both are nature’s way of reminding us that energy never really dies; it merely changes costume.

Whether through fasting, breathwork, or mindful presence, you can teach your body to reboot itself at every level, from the spark of the nervous system to the quiet housekeeping of the cells.

So the next time you breathe deeply, imagine that golden flame flickering in your belly. Picture your cells waving tiny mops and brooms, humming away as they recycle the old into the new. You are not a static object deteriorating through time; you are an ongoing act of cosmic maintenance.

And if you happen to start glowing a bit while doing it, don’t worry. It’s just your inner fire saying hello.