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Phone app aims to trick your brain into loving exercise

NCT ID NCT07044570

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

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether a smartphone app that sets daily exercise goals and helps you plan around barriers can change your automatic feelings about physical activity. Researchers will enroll 120 inactive adults who are overweight or obese. Participants wear a Fitbit and answer quick surveys on their phone to measure how fast they associate exercise with positive feelings.

What this could mean

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

Active substance
Behavioural intervention: smartphone-based goal-setting and planning for physical activity
What this could lead to
If successful, this could point toward better ways to help people stick with exercise programs by targeting their automatic feelings about being active.
What could go wrong
This is an early-phase study with only 120 participants, so results may not apply to everyone. The intervention is behavioural and may not produce lasting changes in physical activity.

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.

Participants

About 120 people

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

Started

Mar 2025

Expected to finish

Jun 2026

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.

Who is studied

Physically inactive adults with overweight or obesity who are living in the U.S.,

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: 1. Aged ≥ 18 years 2. Reside in the United States 3. Self-reported BMI ≥ 25 4. Current structured physical activity engagement \< 60 minutes per week 5. Own a personal smartphone device 6. Reside in an area with Internet or Wi-Fi connectivity during the study period 7. Able to speak and read in English 8. Interested and willing to start a physical activity program 9. Willing to wear a Fitbit Versa smartwatch provided by the study team everyday continuously (including at work and during physical activity), in place of any Fitbits or smartwatches previously worn, for the duration of the study period 10. Able to read the small font on a smartwatch screen without glasses, or willing to carry reading glasses during physical activity for the purpose of reading the smartwatch screen 11. Enrolled in the parent eMOTION intervention study Exclusion Criteria: 1. Inability to provide informed consent due to cognitive disability 2. Inability to engage in one or more key treatment components, including those with medical conditions that preclude physical activity engagement or who cannot wear an accelerometer on the wrist or answer brief surveys on the smartwatch for any reason 3. Current pregnancy 4. Referred to the study by another participant or from Reddit.

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Conditions

The condition(s) this trial relates to.

cancer Motor Activity neoplasm Obesity obesity disorder Overweight

As listed by the trial registrant

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

Cancer Overweight or obesity Physical activity

How to take part

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

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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.

Contacts and locations

Locations

  • Univeristy of Southern California

    RECRUITING

    Los Angeles, California, 90032, United States

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