Cramp
Our actions & our advice
The cramp
linked to
the effort
Seems to be
a syndrome…
There are some people prone to cramps others not.

Cramps or "almost cramps" are common in long trail running races and mainly concerns very active muscles.
There are 2 main theories: muscle fatigue or hyperexcitability of nerve endings with a electric imbalance.
Is pickle juice a solution?
We fund medical studies
dedicated to this problem in sport
to better prevent & act.
Why cramp ?
Education / Our advice
Athletes & Coaches
Follow our advice sheet: salt, water, magnesium ... are false information and can even be life threatening.
Our Tips & Recommendations (EN)
Ultra-Health Guidline (EN)
Event Organizers & Health Professionals
Your supply stands must be adapted and the advice disseminated before the race.
Our Tips & Recommendations (EN)
Contact us / customized help
Our referent researchers
Martin Schwellnus
MBBCh, MSc(Med), MD, FACS
Our ambassadors
They are committed to our cause
- Kevin Mayer Decathlon
- Mike Cotty Cycling
- Karine Baillet Multisports Raid
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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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