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Apple watches reveal surprising effects of air purifiers on your body

NCT ID NCT07477834

Knowledge-focused Sponsor: New York University Abu Dhabi 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested whether using an indoor air purifier changes health measures like heart rate, sleep, and oxygen levels. 42 healthy adults wore Apple Watches while using a real or fake (sham) air purifier at home. The goal was to see if cleaner air makes a short-term difference in these body signals.

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

42 people

The number who actually took part.

Started

Feb 2025

Finished

Jun 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.

Ages

18 to 40 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: * Own an Apple Watch Series 6 or above * Own an iPhone * iPhone and Apple Watch updated to the latest software versions (iOS 18 and watchOS 11, as of January 2025) to ensure consistent and latest algorithms for measuring health * Age range: 18 - 40 * Non-smoker, defined as never smoke in life or have stopped smoking for at least one year before the start of the study Exclusion Criteria: * Own a Apple Watch sold by Apple in the United States on or after January 18, 2024 which does not support SpO2 measurements. These are indicated with part numbers ending in LW/A. * Own or currently use an air quality monitor that can measure particulate matter * Own or currently use an air purifier (humidifier or scent diffuser is fine) * Any known pre-existing conditions: asthma, diabetes, obesity (BMI \> 30), or chronic cardiorespiratory disease * Taking any medications that might affect the heart and lung function

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Conditions

The condition(s) this trial relates to.

retinal vasculopathy with cerebral leukoencephalopathy and systemic manifestations sleep disorder

As listed by the trial registrant

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

Air pollution exposure Heart rate HRV Respiratory rate Resting heart rate Sleep SPO2

Contacts and locations

Locations

  • New York University Abu Dhabi

    Abu Dhabi, United Arab Emirates

More trials for these conditions

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