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App aims to get cancer survivors moving – but trial stopped early

NCT ID NCT03953326

Symptom relief Sponsor: Penn State University 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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 a smartphone app called HeartPhone that appears on the lock screen to encourage physical activity in breast cancer, leukemia, and lymphoma survivors. Participants used the app for 3 months and wore a Fitbit to track activity. The goal was to see if the app could increase exercise and improve blood vessel health. However, the trial was terminated early with only 2 participants enrolled, so results are very limited.

What this could mean

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

Active substance
HeartPhone app (behavioral intervention)
What this could lead to
If it worked, this app could help cancer survivors become more active and improve their heart health.
What could go wrong
The trial was terminated early with only 2 participants, so we have very little data. It is unclear if the app is effective or safe for wider use.

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

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

2 people

The number who actually took part.

Started

Apr 2019

Finished

Dec 2020

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 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Age 18-65 years * Diagnosis of breast cancer, leukemia, or lymphoma \<15 yrs * Completed chemotherapy with cardiotoxic anthracycline-based agents 1+ year ago * English-proficiency * Own \& use smartphone with Android operating system Main Study and Ancillary Study Exclusion Criteria: * Currently receiving curative treatment for cancer * 90+ min/week moderate (or greater) intensity PA * Any medical contraindications on the Physical Activity Readiness Questionnaire * Require an assistive device for mobility or has any other condition that may limit or prevent participation in moderate-intensity physical activity * Current smoker * Pregnant or planning to become pregnant in the next 6 mos/breastfeeding * Allergy to test substances * Allergy to latex Ancillary Study: * Taking metformin * Current medications that could conceivably alter the cardiovascular or thermoregulatory control or responses (e.g. beta blockers, calcium channel blockers, angiotensin receptor blockers)

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm leukemia lymphoma

As listed by the trial registrant

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

Breast cancer Leukemia Lymphoma

Contacts and locations

Locations

  • The Pennsylvania State University

    University Park, Pennsylvania, 16802, United States

More trials for these conditions

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