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Inside the 106 km race: scientists track Runners' blood and muscles

NCT ID NCT06969898

Knowledge-focused Sponsor: Universitat Jaume I Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study followed 37 healthy adults running a 106 km ultramarathon. Researchers took blood samples, measured muscle damage, and tested strength before, during, and after the race. The goal was to learn how extreme endurance exercise affects the body, including differences between men and women. Since this is an observational study, it does not test a treatment or intervention.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

37 people

The number who actually took part.

Started

Jan 2025

Finished

Jul 2025

Lead sponsor

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.

Who is studied

Ultra-trail runners that will participate in the CSP2025 race (Castellón, Spain; 2025/04/11-12)

Ages

18 to 60 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * Adults healthy with 18-60 years * Must have completed at least two races of 65 km or longer. * Must be registered as a participant in the CSP 2025 race Exclusion Criteria: * Having heart disease * Having kidney disease * Taking a medication on an ongoing basis

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Conditions

The condition(s) this trial relates to.

Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Physical exercise

Contacts and locations

Locations

  • Jaume I Univesity

    Castellon, Castellón, 12071, Spain

More trials for these conditions

Other studies related to the condition(s) this trial covers.