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Can AI on your phone get you fitter? trial tests digital coaching

NCT ID NCT07813312

Prevention Sponsor: Transilvania University of Brasov 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 10, 2026 · Last updated Sep 11, 2026 · Updated 1 time

Summary

Researchers are testing whether AI-supported digital coaching combined with Samsung Health activity monitoring can improve cardiorespiratory fitness and physical activity in male university students. The trial enrolls 312 students who already take 5,000 to 7,499 steps per day. Half receive adaptive daily step goals, real-time coaching, progress feedback, and recovery recommendations for about 10 weeks; the other half use standard monitoring without AI coaching. The main measure is estimated VO2max from a 12-minute run-walk test, with daily step counts tracked as a secondary measure.

What this could mean

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

Active substance
AI-supported digital coaching with Samsung Health-based activity monitoring
What this could lead to
If it works, this could offer universities a low-cost way to help students move more and build fitness using their phones and smartwatches.
What could go wrong
The trial is short and enrolls only male university students who already take some steps, so results may not apply to other groups. Digital coaching often loses its effect once the study ends.

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

312 people

The number who actually took part.

Started

Mar 2026

Finished

May 2026

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 25 years

Sex

Male participants only

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: * Male university student. * Average of 5,000-7,499 steps/day over the last 14 valid pre-baseline activity-monitoring days available through the study workflow. * Self-reported moderate-to-vigorous physical activity of 150-299 minutes/week on the International Physical Activity Questionnaire-Short Form (IPAQ-SF). * Completion of the Physical Activity Readiness Questionnaire for Everyone (PAR-Q+); participants with an affirmative response were required to obtain medical clearance before enrollment. * Written informed consent provided before baseline assessment and randomization. Exclusion Criteria: * Did not meet the study-defined semi-active physical-activity criteria, including participants who were already highly active. * Medical contraindication to participation or failure to obtain required medical clearance following safety screening. * Planned absence of more than 2 weeks during the study period.

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Conditions

The condition(s) this trial relates to.

Motor Activity

As listed by the trial registrant

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

Cardiorespiratory fitness Physical activity

Contacts and locations

Locations

  • Transilvania University of Brașov

    Brasov, Brașov County, 500036, Romania

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