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Scientists check what happens to Middle-Aged runners after a 100-Kilometer race

NCT ID NCT07451717

Knowledge-focused Sponsor: Medical University of Gdansk 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at how running a 100-kilometer ultramarathon affects the health of amateur runners aged 45 and older. Researchers measured changes in blood, heart, lungs, muscles, nerves, and mental state before and after the race. The goal was to understand the overall impact of extreme exercise on the body. 52 runners took part in this completed study.

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

52 people

The number who actually took part.

Started

Aug 2025

Finished

Dec 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

Amateur ultramarathon runners

Ages

44 years and older

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: * Age ≥ 45 years * Planned completion of a 100 km race during a specific sporting event * Willingness to participate in all research procedures included in the project Exclusion Criteria: * Refusal to participate in the project * Occurrence of serious illnesses that may pose a risk to the athlete * Detection of significant changes in health status during the initial examination that may be associated with complications during exercise (participants were advised against participating in the race and were not included in the study group)

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As listed by the trial registrant

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

The impact of extreme physical exertion on cardiovascular system The impact of extreme physical exertion on glucose The impact of extreme physical exertion on health The impact of extreme physical exertion on joints and muscles The impact of extreme physical exertion on kidney function and water-electrolytes balance The impact of extreme physical exertion on neurological system The impact of extreme physical exertion on respiratory system

Contacts and locations

Locations

  • Medical University of Gdańsk

    Gdansk, Poland