Gastrointestinal symptoms
Our actions & our advice
Our studies
against
exercise-associated
gastrointestinal
symptoms
of athletes
Reduced blood flow to the gut and increase sympathetic drive associated with exercise has been linked to clinical implications: such as severe gastrointestinal symptoms that warrants exercise cessation to fatal septic shock or instigation of gastrointestinal inflammatory or function disease/disorder in athletes with predisposition.

Gastrointestinal symptom incidence has been reported to affect 60-96% of ultra-endurance athletes during competition. Symptoms can range from mild discomfort and inconvenience to extremely severe that cause ultra-endurance activity reduced workload, cessation, or even withdrawal, including the need for medical attention during and extended to a prolonged period after the ultra-endurance event.
Thus, exercise-associated gastrointestinal symptom is multi-factorial and dynamic in nature, making it difficult and tricky to detect, manage, and treat.
We finance medical studies
dedicated to this highly relevant
and prevalent medical complication
in ultra-endurance sports,
to better prevent and manage.
Our medical research
1. Gut microbiota in ultra-endurance runners.
- Name of study: Gut microbiota of ultrarunners prior to and following a 161 km ultramarathon race
- Type of sports: Trail running
- Who: Mr Laye
- Donors: Ultra Sports Science
- Start: 2017 and still in progress
2. How to treat the nausea and vomiting?
- Name of study: TWOFUN: Treatment with Ondansetron for ultra-marathon-associated nausea and vomiting
- Type of sport: Ultramarathon.
- Who: Pasternal & Al.
- Donors: Ultra Sports Science
- Started: 2017 and still in progress
3. Circadian variation in gut responses to exercise.
- Name of study: Impact of day-time versus night-time exercise on markers of exercise-induced gastrointestinal syndrome.
- Type of sport: Trail running and ultramarathon.
- Who: Stephanie Gaskell, Ricardo Costa, Rebecca Burgell, Jane Muir.
- Partners: Monash University, Australia.
- Donor Companies: Ultra Sports Science
- Started: 2019 and completed.
Education / Our advice
Athletes & Coaches
Explore links :
BASE Nutrition & Exercise Clinic
Exercise and the gut online CPD course
Exercise and the gut recipe book
Graduate Research Industry Partnership Food and Dairy
Our Tips & Recommendations (EN)
Ultra-Health Guidline (EN)
Event Organizers & Health Professionals
You can read our advise:
Our Tips & Recommendations (EN)
Contact us / customized help
Our referent researchers
Ricardo Costa
Prof. MD.PhD. RD. APD.
Expert Gastro-Intestinal
Australie
Stephanie Gaskell
Isabella Russo
Dr Samantha Gill
Dr Rhiannon Snipe
Our ambassadors
They are committed to our cause
- Fernanda Maciel Ultra-trail
- Sebastien Chaigneau Ultra-trail
- François D'Haene Ultra-trail
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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