I have read the material on Giorgos Tsianos over and over again. Not because it is complicated, but because one small detail keeps pulling me back: he started from Ormenio, a village on the border with Bulgaria and Türkiye, then cycled, swam, climbed, ran and sailed for twelve consecutive days to reach Gavdos – the island at the southernmost point of Europe.

For those twelve days, he was the only person undertaking the journey. He was also the physician, the physiologist, and the project lead. The experiment and the experimenter shared the same body.

I once witnessed something similar at a long-distance relay. A coach ran while measuring his own heart rate on a watch, taking notes on his phone as he climbed a hill. He told me: "When I am both the subject and the observer, I know exactly which lie I am telling." That sentence has stayed with me for years.

The Tsianos story has the same strange structure, but on a far larger scale. And it is funded by the Greek Ministry of Digital Governance and Artificial Intelligence, through the Foundation of the Hellenic World, under the programme "Integration of Artificial Intelligence in the Field of Virtual and Augmented Reality, Phase B."

A sports journey, read carefully, is in fact a technology demonstration.

The context must be stated clearly before analysis: this is not a competition sanctioned by any federation. World Athletics does not govern this project. WADA has no jurisdiction here, because there is no official competing athlete. There is no qualifying standard, no ranking, no medal.

What exists is this: five sports blended together – road and trail cycling, open-water swimming, mountaineering, road and trail running, and sailing. All thirteen regions of Greece are cut across. A mountaineering point at the highest altitude in the country – here I infer Mount Olympus at 2,917 metres, though the document does not say. And a wearable sensor array recording heart rate, body temperature, blood oxygenation, blood glucose, movement, and fatigue.

That data is transmitted live. The public can follow both the route and his physiology on a dedicated website.

But here is the point I must state plainly: not a single performance metric of this journey has been disclosed. No total distance. No daily timing. No splits. No water temperatures, sea states, or cumulative elevation. All we know are the number twelve and the number thirteen.

For someone like me, who writes athlete biographies for a living, this is like being invited to a final without anyone telling me the score.

The most interesting part of the project is not the journey. It is the question the document itself raises: whether physiological data can be transmitted, stored, visualised and reliably interpreted in real time, despite constraints of movement, weather, water, terrain and unstable connectivity.

This is a specific, falsifiable, genuinely difficult technical question. It is far better than the "unprecedented" claims that surround it.

If this sensor stack survives twelve days in extreme conditions – water immersion, high altitude, patchy connectivity, motion artefact – its value is not in elite sport, but in the remote health-monitoring market. That is the application the document itself names: "remote health monitoring, operational safety, research, human performance, and public understanding of physiology."

Three of those five applications have nothing to do with competitive sport.

This is what I realised on reading the funding line carefully: a Ministry of Digital Governance and Artificial Intelligence is funding a programme about AI and VR/AR. The end product is likely not a physiology paper, but a data-visualisation platform, a digital model, or an immersive experience. The journey is only the demonstration setting.

There is nothing wrong with that. But it needs to be called by its correct name.

The counterintuitive angle here is this: the commercial value of the project is not proportional to its sporting value. In sport, a journey that is untimed, unrecognised, and has no rivals cannot technically be ranked. It is not a performance. It is a field test.

But in the wearable and remote-monitoring market, a field test that survives twelve days has real value. Consumer devices usually fail precisely under these conditions: immersion, sudden temperature swings, violent motion, loss of connectivity.

So when I read phrases like "high scientific and technological value," I ask: value measured by what? A peer-reviewed publication, an open dataset, or a commercial technology product?

The document does not answer. And that silence is itself information.

There is another aspect that caught my attention, as someone who has followed many women athletes erased by history. In this project, only one name is given: Tsianos. The "great co-athletes," the "distinguished researchers," the "specialised escort team" – all anonymous.

In science communication, names are credibility. Naming only the person acting as experimental subject, while concealing the entire scientific leadership, creates a notable void. No ethics board is mentioned. No institutional review committee. No independent medical monitor.

For a state-funded project broadcasting the health data of an identifiable individual live, this is not a small detail. Heart rate, respiration, temperature, oxygenation and glycaemic data belong to the most sensitive category of personal data under European data protection law. Broadcasting them live requires a clear consent framework.

That framework may exist. But it is not described here.

One more detail deserves attention: the risk architecture of this project is entirely unlike a competition. In a major marathon, people worry about whether the athlete will finish. Here, the worry list is longer: Achilles tendinopathy, quadriceps damage from repeated downhill running, cramps in cold-water swimming, hyponatraemia, heat illness on land legs, hypothermia at sea, and exertional rhabdomyolysis across consecutive days.

None of these risks is confirmed by the document. But they are structural risks that anyone who has covered endurance sport recognises. Twelve consecutive days of alternating sports, with the body placed under a different load profile each day, is a design deliberately producing cumulative fatigue.

For a study of "fatigue, adaptation, recovery, and environmental effect," an athlete at peak form would be the wrong subject. You need someone who carries the load. Tsianos plays that role.

But this also means the project cannot produce any conclusion about his competitive ceiling. It can only produce degradation and adaptation curves. That distinction is often blurred in promotional coverage.

I am not writing this to accuse anyone. A project can be both genuine research and genuine technology demonstration. An athlete can be both subject and scientist without losing legitimacy.

But there is one question I cannot shake: if the journey is completed, the sensor stack holds, and then no scientific paper, no dataset, and no product is ever published – what, exactly, is the "science" here?

There are journeys recorded in numbers, but the real question never lies in the numbers.

There are matches whose score is never written down, because people choose to forget.

And sometimes, the way a state tells a story about a human body tells us far more about the state than about the body.