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Silent swimmers' lungs may hold water after races

NCT ID NCT06984120

Knowledge-focused Sponsor: Dalarna County Council, Sweden 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at 609 adults who completed an open-water swimming race and had no breathing problems. Researchers used lung ultrasound to check for extra fluid in the lungs. The goal was to find out how common hidden lung water is in swimmers who feel fine.

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

609 people

The number who actually took part.

Started

Jun 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

Swimmers of all swimming skills that participate in the open-water swimming event of Vansbrosimningen - a Swedish open-water swimming event that takes place in Vansbro, Sweden

Ages

18 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: * Completion of an open-water swimming race during the "Vansbrosimningen" open-water swimming event * No respiratory symptoms (dyspnea and/or cough) during or right after the race * Age ≥ 18 years Exclusion Criteria: * Presence of respiratory symptoms (dyspnea and/or cough) during or right after the swimming race * Declines participation

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Conditions

The condition(s) this trial relates to.

pulmonary edema

As listed by the trial registrant

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

Extravascular lung water Pulmonary edema - acute

Contacts and locations

Locations

  • Center of Clinical Research Dalarna

    Falun, Dalarna County, Sweden

  • Center of Clinical Research Dalarna

    Falun, 79182, Sweden

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