Trail vs marathon: which race wears you out more?
NCT ID NCT06282341
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at how trail running and marathon running affect fatigue and recovery. Healthy runners completed a simulated marathon, a simulated trail run, or a real trail run. Researchers measured muscle strength before, right after, and one month after each race to see how the body recovers from these different types of running.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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46 people
The number who actually took part.
- Started
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Dec 2023
- Finished
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Dec 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 55 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Common for MARASIM, TRAILSIM and TRAILNAT: * Male or female * 18-55 years old * Endurance runners who run at least one running session of 20 km per week * Being able to run a marathon under 5 h or finishing a trail of 30 km during the last 3 years * Refrain from participating to a competition one month before the first visit and during the duration of the study * To have a medical certificate of no contraindication of running practise in competition * Registered with a social security scheme * Having given the written consent freely Specific for the 3 groups : * Specialist of trail running (TRAILSIM and TRAILNAT) * Specialist of road running (MARASIM) Exclusion Criteria: * Subjects who present cardiac or articular chronic pathologies (example: repeated sprain, patellar or joint problems) * Subjects who present chronic or central neurological pathologies * Subjects deprived of liberty or who should be legally deprived * Subjects who report to take forbidden products by the World Anti-Doping Agency * pregnant or breastfeeding woman
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Unités de Myologie et de Médecine du Sport
Saint-Etienne, France, 42055, France
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