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Smartwatch data may predict special forces performance decline

NCT ID NCT04672811

Knowledge-focused Sponsor: University of Southern California Source: ClinicalTrials.gov ↗

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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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 24, 2026 · Last updated Aug 25, 2026 · Updated 1 time

Summary

This study tests whether a mobile app paired with an Apple Watch can continuously measure the mental and physical status of US Special Operations Forces before and after deployment. Over six months, the app and wearable will collect data like heart rate, activity, and sleep, while also offering supportive features. The goal is to see if this approach can help reduce performance degradation and predict it from daily behavior patterns.

What this could mean

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

Active substance
Study App and Apple Watch
What this could lead to
If successful, this could lead to better ways to monitor and support the mental and physical health of military personnel, potentially predicting and preventing performance degradation.
What could go wrong
This is an early-stage observational study, so it may not prove that the app can predict or reduce degradation. Results may also not apply to broader populations.

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

595 people

The number who actually took part.

Started

Jan 2021

Finished

Dec 2024

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 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: * Post or Pre-deployment Army and Marine Warfighters in 3rd SFG(A) and 1st Reconnaissance Battalion. Post-deployment (defined as within three months of returning from deployment) for 3rd SFG(A) and within six months prior to deployment for 1st Reconnaissance Battalion Exclusion Criteria: * Potential participants will be excluded from the study if they are expecting to be in a pre or post operational environment that would not be conducive to study adherence

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As listed by the trial registrant

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

Military activity Military operations

Contacts and locations

Locations

  • Camp Pendleton

    Oceanside, California, 92058, United States

  • Ft. Bragg

    Fayetteville, North Carolina, 28310, United States

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