0 to 100

From sedentary to ultra-trail runner in 18 months.

In this unique, world-first study, we want to demonstrate that we have no choice: to be truly healthy, we must move. We will accompany 40 sedentary individuals to help them finish a 100km ultra-trail race. If this effort seems extraordinary to most, it is solely due to the extreme sedentary nature of our societies.

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About

A groundbreaking scientific project

For 95% of the population, more physical activity means better health. The 0 to 100 project aims to scientifically measure the effects of high doses of exercise on physical and mental health.

Discover the scientific study

They already support us!

Jean Monnet University (UJM)

Academic Partner
As an academic partner in the project, UJM provides its scientific and institutional expertise to guarantee the rigor and scope of the research conducted.

UTMB®

Supporter Partner
A global reference in trail running, the UTMB supports 0 to 100 by offering an exceptional setting to take on the ultimate challenge: finishing a 100km ultra-trail.

Trail Running School

Technical Partner
Specializing in trail running training, the Trail Running School supports the project with its educational expertise and its commitment to making the discipline accessible to all.

University Hospital of Saint-Étienne

Sponsor of the 0 to 100 study
The University Hospital of Saint Étienne is the promoter of the 0 to 100 study, guarantor of the medical and regulatory framework of the project, in close collaboration with the scientific teams of the Jean Monnet University.

UJM Foundation

Institutional Partner
The UJM Foundation financially supports the 0 to 10 project and allows patrons to direct their donations directly to the 0 project.

Loire Department

Institutional Partner
The Loire Department, committed to promoting sport and health in its territory, supports the 0 to 100 project through financial support dedicated to video recordings and communication development.

SEM

Institutional Partner
Saint-Étienne Métropole, a territory of innovation and sport-health, supports the 0 to 100 project which fully embodies the values of exceeding expectations, commitment and well-being promoted by the metropolis.

Hoka

Official Partner
As an official partner of the 0 to 100 project, Hoka, a global leader in trail running, will equip our participants throughout their preparation, right up to the finish line of the CCC®

SIDAS

Official Partner
As an official partner of the 0 to 100 project, Sidas, an expert in foot comfort and technical equipment for athletes, supports the 0 to 100 project with its expertise.

JLB Development

Supporter Partner
JLB Développement financially supports the 0 to 100 project, thus affirming its commitment to research, sport and health.

Julbo

Supporter Partner
Julbo, an expert in outdoor sports eyewear, supports the 0 to 100 project by contributing to its funding and equipping participants with trail running glasses.

Naäk

Supporter Partner
Committed to responsible performance, Naäk joins the 0 to 100 project as a nutrition partner, in order to support athletes in their preparation and races through innovative and sustainable nutrition.

SVR

Supporter Partner
SVR is committed to supporting the 0 to 100 project to protect our participants and promote skin cancer prevention through its high protection sunscreens.

Kelyps Interim

Supporter Partner
As a partner of ASSE and a major player in the Saint-Étienne area, Kelyps Intérim supports the 0 to 100 project in its mission: to prove that perseverance and collective spirit can transform lives.

Trinoma

Technical Partner
Trinoma, financial partner of the 0 to 100 project and specialist in movement analysis, supports this unique study which combines science, health and performance.

The Runner's Clinic

Technical Partner
The Running Clinic supports the 0 to 100 project by making available to participants its network of healthcare professionals trained in the prevention and treatment of running injuries.

Nolio

Technical Partner
As a partner in the 0 to 100 project, Nolio provides its performance planning and analysis platform for each participant, facilitating personalized training follow-up.

France TV

Media Partner
France Télévisions will follow the 0 to 100 adventure with 7 ten-minute reports broadcast every three months in Stade 2, as well as a final 90-minute documentary.

The World

Media Partner
Le Monde will provide regular coverage of the 0 to 100 project, with a major documentary story, a web series of 10 short videos and 4 “explainer” videos and articles in the editorial version of the newspaper.
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News

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THE
9 October 2026

Protection solaire en trail : votre peau, votre premier équipement

par Stéphanie Leclerc-Mercier, dermatologue spécialiste des problématiques cutanées des sportifs (hôpital Necker-Enfants Malades, centre médical de l’INSEP), présidente de l’association Dans la Peau des Sportifs, traileuse amateur et titulaire du certificat universitaire de trail-running de St Etienne Quand on prépare un ultra, on passe des heures à choisir ses chaussures, sa montre, son sac. Mais le premier équipement du […]

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THE
July 7, 2025

Women and trail running: let's put an end to stereotypes, not the kilometers

In the demanding world of trail running, women still have to fight for their place. Indeed, the figures show that they remain significantly underrepresented in long-distance races (10-121% female participation in major 100-mile ultra-trails), and are sometimes invisible in the narratives or on the podiums (or in the prize money). The same is true at the level of […]

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THE
May 19, 2026

Project 0 to 40: when trail running becomes a real lever for inclusion and health

At the heart of the 0 to 100 project, a complementary initiative is emerging: the 0 to 40 project. While not a scientific study, this sport-health challenge shares the same values and spirit as its larger counterpart, while addressing a fundamental issue: inclusion in sports and […]

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Intrigued by the 0 to 100 project? Contact us to learn more about the study and discover how you can participate.
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