The heart and the lung
Our actions & our advice
Cardiac
or respiratory
asthma
also affect
many athletes…
The two organs are interdependent.
During ultra endurance we quickly change altitude
Do we know that well ...?

The cardio-respiratory system is essential in sports.
The adaptations of this system are complex, especially for ultra-endurance exercises in extreme environmental conditions. How does in vivo man adapt to so many changes?
Ultra athletes seem to develop more atrial fibrillations than other sports subjects…
We fund medical studies
dedicated to this problem in sport
to better prevent & act.
Our medical research
Cardiorespiratory adaptation in ultra-trail events.
- Study: The pulmonary consequences when participating in the UTMB or the Hong Kong 100 and the impact of electromagnetic field therapy by phases (PEMF)
- Sport universe: Trail-running
- Who: Prof. Bruce D. Johson & Glenn Stewart PhD
- Partners: UTMB & Hong Kong 100
- Donor companies: Mayo Clinic & Ultra Sports Science Foundation
- Study in progress, started in 2019
Study MayoClinic (EN)
Review Study MayoClinic (EN)
Cardiorespiratory Implications of Ultra-marathon (EN)
Education / Our advice
Athletes & Coaches
Cardiorespiratory adaptation is complex in ultra endurance events. You have to accept significant variations from one training to another. The medication must really be adapted by professionals because you engage in environments that are sometimes very distant.
Our Tips & Recommendations (EN)
Ultra-Health Guidline (EN)
Event Organizers & Health Professionals
The defibrillator saves lives.
Our Tips & Recommendations (EN)
Contact us / customized help
Our referent researchers
Bruce Johnson
Prof. PhD.
Expert Coeur & Poumon
USA
Glenn Stewart
PhD
Expert Coeur & Poumon
USA
Stéphane Doutreleau
MD
Cardiologue du sport et physiologiste
France
Our ambassadors
They are committed to our cause
- Nathalie Mauclair Trail & Ultra-trail
- Antoine Guillon Ultra-trail
- Christian Haettich Cycling
Make a donation,
support our field studies
We need your donations,
to bring scientists to ultra-athletes,
to better understand and fight against the risks.








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