What science is discovering about age-old paths: pilgrimage is not an escape from reality, but a homecoming in the brain.
The laboratory has sky instead of a ceiling. There are no test tubes, only worn trekking poles. No white coats, but backpacks marked by hundreds of kilometres. And yet, along the world’s paths, one of the oldest and most contemporary experiments on the human mind is underway.
Pilgrims do not know it, but every step they take quietly rewrites the inner geography of who they are.
When science learned to listen to footsteps
In 1982, when the scientific world still looked with suspicion at anything related to the “spiritual,” a group of British researchers did something bold: they tried to measure the ineffable.
They followed people travelling to Lourdes, not to document miracles, but to record subtle changes in inner life converted into numbers.
The results, published in Psychological Medicine, told an unexpected story: anxiety and depression had withdrawn like a tide, leaving new imprints on the sand of the psyche. And it was not the brief euphoria of someone just back from a holiday. It was something that persisted, that took root, that stayed.
Forty years later, in 2024, a study called Ultreya — from the medieval pilgrims’ cry meaning “onward!” — carried that intuition into the age of data. Spanish researchers compared pilgrims on the Camino de Santiago with traditional holidaymakers. Same weeks away from home, same sun on the skin, same break from routine.
But people came back different. Pilgrims showed transformations that the numbers could indicate but not fully explain: a renewed capacity for joy, for being with themselves, for looking at uncertainty without panic. They were not simply “relaxing.” They were learning a new way of inhabiting themselves.
The silence that arrives after noise
There is a moment — usually around the third or fourth day — when something happens that pilgrims struggle to put into words. The mental chatter, that inner voice that comments on everything, judges everything, anticipates catastrophes, suddenly lowers its volume.
Neuroscientists at Stanford University have given this a name: a reduction in activity in the medial prefrontal cortex, the region of the brain where ruminative thoughts loop on themselves, where depression builds its verbal prisons.
But numbers do not capture the experience. A pilgrim described it to me like this:
“For two days I felt naked without my obsessive thoughts. Then I realised: I wasn’t naked. I was free. And I had forgotten what it feels like to be free in your own head.”
Zen monks have known this for centuries. “The mind follows the breath as a dog follows its master,” they say. On the road, where every step is also a breath, where movement becomes a kind of prayer even for those who do not pray, the mind finally stops racing ahead into the future or sinking back into the past.
It comes back here. Now. Into this step.
The invisible alchemy of walking
Every step is a small dose of medicine the body produces for itself. This is not a metaphor. It is measurable chemistry.
After about twenty minutes of steady walking, the body begins to release endorphins — natural opioids that soften pain and switch on small lights of well-being. Serotonin, the neurotransmitter linked to emotional stability, rises with sunlight on the skin and contracting muscles. BDNF — a protein that nourishes neurons the way water nourishes seeds — starts to increase, helping to create new connections in the brain.
Pilgrims do not walk because they know these names. They walk because they feel something shifting.
A man who walked to deal with grief told me:
“It was as if my body remembered something my mind had forgotten. It remembered that it can heal itself, if you just give it time and movement.”
Sherpas in the Himalaya have understood this for generations. They carry impossible loads at altitudes where the air is so thin that breathing becomes an act of will. But they do not do it by “fighting” the mountain. They do it by finding rhythm — that suspended point where breath, step, and heartbeat move together. It is not brute strength. It is surrender to a larger rhythm.
The paradox: Suffering that opens the door to renewal
It would be dishonest to portray pilgrimage as a luminous stroll. It is effort. It is blisters that open. It is nights on unfamiliar mattresses where the body complains. It is storms that catch you on a ridge. It is moments when you think: “Why on earth did I do this? Maybe I should just go home.”
And it is exactly there, in the friction between will and the urge to quit, that something happens.
Psychologist Mihály Csíkszentmihályi devoted his life to studying those moments when we lose our sense of time, when the ego recedes and only the action remains. He called it “flow.” Pilgrimage is extended flow: hard enough to demand your full presence, manageable enough not to crush you.
Many pilgrims speak of breaking down halfway. Sudden tears on an ordinary uphill stretch. Waves of sadness that seem to appear from nowhere. But perhaps they do not come “from nowhere.” They come from the depths, from where we have stored what we did not have time or courage to feel.
A woman confided:
“On the fifth day I cried for my father, who had died ten years earlier. I cried and walked, walked and cried. And my feet kept moving forward. That’s when I understood: I can feel this pain without drowning. I can move through it by walking.”
The road does not erase pain. But it teaches that you can walk with pain. And that changes everything.
The community without a name
Another form of healing unfolds on the path, more discreet but no less powerful: discovering we are less alone than we thought.
On the Camino there are no formal introductions. You do not ask “What do you do for a living?” before asking “How are you really?” People open up while walking side by side, looking ahead instead of into each other’s eyes. It is easier to speak difficult truths when you do not have to hold someone’s gaze.
An African proverb says: “If you want to go fast, go alone. If you want to go far, go together.” On the path you discover that “together” does not always mean the same person day after day. It means knowing that someone, somewhere along this same route, is walking with fears, doubts, and hopes similar to yours.
Oxford researchers have documented that synchronised physical activity — walking together, rowing together — increases endorphin release and strengthens social bonds more than doing the same activity alone. But numbers do not capture the moment when a stranger offers you a blister plaster, waits when you slow down, or simply walks in silence beside you when words are too heavy.
What the path does not promise
Pilgrimage is not a universal remedy. It is not the answer to everything.
For those living in very deep depression, for those grappling with thoughts of not wanting to be here at all, walking alone for weeks can be dangerous. Silence can amplify the wrong voices. Solitude can become a trap instead of a release.
The Ultreya study confirmed this: the greatest benefits appear in people with moderate wounds, not in those who are drowning. And even for those who return feeling transformed, there is often a “post-camino low” — the realisation that the world you left has not changed along with you.
The path offers a pause from noise. But sooner or later, the noise is waiting for you at the terminus.
Medicine on the move
Even so, something is shifting in how we view walking as a form of care.
In Scotland, doctors can prescribe walks in nature as they would prescribe medication — not as vague advice, but as a specific regimen: how far, how often, where. In Japan, shinrin-yoku — forest bathing — has been recognised as a preventive health practice since 1982.
This is not a fashion. It is science catching up with what many cultures have long understood: the body heals better when it moves, in nature, in connection with something larger than itself.
Coming home
The human brain may simply not be designed to stay still. For roughly 300,000 years we have walked. A lot. Our ancestors covered 10–15 kilometres a day, not to train but to live. Movement was survival, searching for food, staying with the group.
When you walk for days, you are not doing something extraordinary. You are doing something deeply ordinary for our species. The anomaly is everything else: eight hours in front of a screen, unending notifications, horizons replaced by walls.
Pilgrimage is a return. A return to the original setting — the way of being for which we evolved. And many discover, with some surprise, that this old “settings menu” still works remarkably well.
If you are considering walking to heal something inside you, let me offer this: the path will not give you answers. It will give you company.
The company of your feet carrying you forward even when your mind wants to stop. The company of your breath that continues, step after step. The company of strangers who become quiet witnesses to your journey. The company of your own inner life, no longer buried under noise.
A Zen proverb says: “Before enlightenment, chop wood and carry water. After enlightenment, chop wood and carry water.”
We might say: before the Camino, you are anxious. After the Camino, perhaps you are still anxious. But you have learned to walk with your anxiety instead of being paralysed by it. And you have discovered that you can go much farther than you imagined.
Sometimes, healing is not the absence of pain, but the discovery that you can walk with it.
And for many, that changes everything.
Author’s note: This article does not replace professional mental health support. It aims to honour both the ancient knowledge of the paths and the modern understanding of how the human mind heals.
