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New wearable facemask could replace bulky lab gear for fitness tests

NCT ID NCT07596108

Knowledge-focused Sponsor: Duke University 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 compares a new wearable facemask device (Calibre) to a standard lab system (COSMED) for measuring fitness during intense exercise. Researchers will enroll 40 healthy adults aged 18-55 to see if the Calibre device accurately tracks oxygen use and other key fitness measures. If successful, this could lead to simpler, more accessible fitness testing outside of specialized labs.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If this device works well, it could offer a simpler, wearable way to measure cardiorespiratory fitness outside of a lab.
What could go wrong
This is a small, early-stage validation study, not a treatment trial. The device may not match the accuracy of the standard lab equipment.

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.

Phase

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

About 40 people

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

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Jul 2027

An estimate. End dates often move.

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.

Ages

18 to 55 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: * Age 18-55 * Able to speak English * Able to provide informed consent Exclusion Criteria: * Acute myocardial infarction * Unstable angina * Syncope * Uncontrolled asthma * Arterial desaturation at rest on room air \<85% * Severe untreated arterial hypertension at rest (\>200 mm Hg systolic, \>120 mm Hg diastolic) * Significant pulmonary hypertension * Active thrombosis of the lower extremity, unless treated for at least 2 weeks prior to participation. * Within 2 weeks of acute symptomatic pulmonary embolus * Considered inappropriate to participate by Principal Investigator * Previously experienced a heart attack * Pregnancy

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As listed by the trial registrant

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

Cardiorespiratory fitness

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

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