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Small breath tester could replace bulky exercise machines

NCT ID NCT07326449

Knowledge-focused Sponsor: Linkoeping University Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 checks if a small, portable device can reliably measure carbon dioxide in exhaled breath during rest and light cycling, compared to the standard large machine. Twenty healthy adults will do two exercise tests weeks apart. The goal is to see if the portable tool gives consistent results over time and matches the standard method.

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

About 20 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2025

Expected to finish

Feb 2026

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Healthy volunteer research participants recruited through advertisements at the research group's workplaces.

Ages

18 to 70 years

Sex

Anyone

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 aged between 18 and 70 years. * Proficient in spoken and written Swedish. * Capable of cycling on an exercise bicycle. Exclusion Criteria: * Current symptoms of upper respiratory tract infection or fever within the past 5 days * Obesity (BMI \> 30 kg/m²) * Known respiratory pattern disorders/hyperventilation syndrome * More than mild asthma or other pulmonary diseases * Cardiovascular disease (except for hypertension with or without treatment, mild heart valve disease at most, previous pericarditis \> 12 months prior) * Known pregnancy * Presence of exertion-related symptoms such as chest pain, dizziness, syncope, arrhythmia, or abnormal shortness of breath

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As listed by the trial registrant

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

Cardiopulmonary exercise test End tidal carbon dioxide Ventilatory physiology VO2MAX

How to take part

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  1. The places running it

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  2. The official record

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Contacts and locations

Locations

  • Region Östergötland

    Linköping, Sweden

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