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Texting your way to fitness: study tests personalized messages for young adults

NCT ID NCT05794178

Knowledge-focused Sponsor: University of Michigan 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether sending personalized text messages at the right time can help young adults who are not very active to move more and gain less weight. About 360 participants will wear an activity tracker for 12 months and receive either personalized messages, random messages, or no messages. Researchers will compare step counts and weight changes over 18 months to see if the personalized approach works better.

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 360 people

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

Started

Mar 2023

Expected to finish

Sep 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 29 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 iPhone or Android smartphone that they would be willing to download the Fitbit app onto and sync with a Fitbit tracker and a custom, AIM app * willing to wear a Fitbit tracker almost continually (23.5 hours/day) for a 12- month period of time * free of visual impairment that would interfere with the receipt of text messages on their phone * capable of reading, speaking and understanding English and of giving informed consent * willing to complete a full 18-month study protocol Exclusion Criteria: * self-report sufficient aerobic activity to meet 2018 Physical Activity Guidelines for American adults * research-grade accelerometer records sufficient aerobic physical activity to meet 2018 Physical Activity Guidelines for American adults * living outside the continental US * one or more contraindications to physical activity * require an assistive device for mobility or have any other condition that may limit or prevent participation in moderate-intensity physical activity * pregnant or planning to become pregnant within the next 12 months * prior diagnosis of cancer, cardiovascular disease, diabetes or metabolic syndrome * concurrent participation in another research study involving physical activity or weight loss * planning to have surgery or relocate outside the continental US within the next year.

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Conditions

The condition(s) this trial relates to.

Sedentary Behavior Weight Gain

As listed by the trial registrant

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

Physical inactivity Weight gain

Contacts and locations

Locations

  • The Pennsylvania State University

    University Park, Pennsylvania, 16802, United States

  • University of Michigan

    Ann Arbor, Michigan, 48109, United States

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