Fit2ThriveMB: Optimization of a Physical Activity Promotion Intervention for Metastatic Breast Cancer Patients (Fit2ThriveMB)

September 28, 2026 updated by: Siobhan M Phillips, Northwestern University

The purpose of this study is to examine which of four components of a digital health intervention using an App and Fitbit meaningfully contribute to increased physical activity in Metastatic Breast Cancer Patients.

Participants will be asked to:

  • Wear a Fitbit and use an app, use 0 to 3 other components for 24 weeks and attend 6 or 12 coaching coaching calls in the first 12 weeks to increase daily steps.
  • Complete a questionnaire at baseline, week 12 and week 24
  • Complete functional performance test (FPT) via Zoom at baseline, week 12 and week 24
  • Wear a research activity monitor (Accelerometer) for 7 days at baseline, week 12 and week 24

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Multiphase Optimization Strategy (MOST) methodology will be used to determine which intervention components or component combinations optimally increase daily steps in a 12-week intervention with a 12-week follow-up. MOST is a framework adapted from engineering that uses highly efficient factorial experiments to evaluate individual, and combined, effects of intervention components to determine which ones can be reduced, eliminated, or replaced to improve efficiency. Insufficiently active people with metastatic breast cancer (MBC) will receive a core intervention consisting of the FIt2ThriveMB app and Fitbit and be randomly assigned to four components, each with two-levels, under consideration for inclusion in the optimized intervention: 1) EHR-integration (on v. off); 2) coaching dose (weekly v. bi-weekly; 3) social+ (on v. off) and 4) goal-setting type (highly tailored v. static). The effects of increasing PA on symptom burden, other intensity activities (i.e. moderate to vigorous, light and sedentary), and functional performance and potential mediators and moderators of component effects will also be examined. Knowledge gained from this study will inform the development of more effective and scalable interventions to improve health and disease outcomes in this population.

Study Type

Interventional

Enrollment (Estimated)

224

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Female sex assigned at birth, age 18 years or older
  • Diagnosed with metastatic breast cancer or locally advanced disease not amenable to surgical resection.
  • Self-report engagement in <150 min/week of moderate to vigorous physical activity
  • Ownership of an Android or iPhone with an up-to-date version of the operating system
  • Internet access to complete assessments
  • Fluency in spoken and written English
  • Willingness to obtain medical clearance to participate.

Exclusion Criteria:

  • Untreated brain metastases
  • Breast cancer with metastases to only the axillary lymph nodes.
  • Self-reported absolute contraindications to exercise (i.e., non-ambulatory, acute myocardial infarction, severe cognitive or functional impairment)
  • Currently pregnant or plans to become pregnant
  • Plans to move out of the United States in next 12 months
  • Current enrollment in another dietary or physical activity trial

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Supportive Care
  • Allocation: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 1- Core, EHR, Weekly Coaching, Social+, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Experimental: 2- Core, EHR, Bi-Weekly Coaching, Social+, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Experimental: 3- Core, EHR, Weekly Coaching, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 4- Core, EHR, Bi-Weekly Coaching, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 5- Core, EHR, Weekly Coaching, Social+, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 6- Core, EHR, Bi-Weekly Coaching, Social+, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 7- Core, EHR, Weekly Coaching, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Experimental: 8- Core, EHR, Bi-Weekly Coaching, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participant Fitbit data will synchronize with the EHR. Participants will receive automated weekly messages via the patient portal. Clinicians can view patient Fitbit data and will receive Epic InBasket messages on the day of patient appointments with a summary of patients' PA progress and talking points to encourage patients.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Experimental: 9- Core, Weekly Coaching, Social+, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 10- Core, Bi-Weekly Coaching, Social+, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 11- Core, Weekly Coaching, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Experimental: 12- Core, Bi-Weekly Coaching, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Experimental: 13- Core, Weekly Coaching, Social+, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Experimental: 14- Core, Bi-Weekly Coaching, Social+, Highly Tailored Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants assigned to this condition will receive the social feed app module and attend 7 synchronous, facilitated group sessions during the 12-week intervention. There will also be a social feed app module is intended to enhance communication and support among participants.

Participants will be prompted each morning to report the intensity of their symptom burden on a scale from 1 to 5. Based on symptom rating, prior day's step goal attainment and/or the number of steps achieved the previous day, participants will be provided with three to four goal options for that day.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Experimental: 15- Core, Weekly Coaching, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will receive 12 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

Experimental: 16- Core, Bi-Weekly Coaching, Static Goal Setting

The core intervention includes educational materials, Fitbit and access to the Fit2ThriveMB Core App.

Participants will receive 6 calls from study staff to provide feedback on PA progress and support to increase PA.

Participants will be provided with a daily step goal for the week. The goal will be progressive and tailored to each individual's progress to build efficacy and ensure safe progression until 10,000 steps/day is achieved (i.e. 4500 steps/day in week 1, 5500 steps/day in week 2, etc.).

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Steps
Time Frame: Baseline, 12 and 24 weeks

The ActiGraph accelerometer will be used. Participants will wear the device during all waking hours for 7 consecutive days, except when bathing or swimming, on their non-dominant hip.

Baseline, 12 and 24 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ActiGraph measured MVPA
Time Frame: Baseline, 12 and 24 weeks

Moderate to vigorous physical activity will be measured using the ActiGraph. Participants will wear the device during waking hours for 7 consecutive days, except when bathing or swimming, on their non-dominant hip. Freedson cut points will be used to determine this activity as 2,690-9,642 CPM.

Baseline, 12 and 24 weeks
ActiGraph measured light activity
Time Frame: Baseline, 12 and 24 weeks

Light intensity physical activity will be measured using the ActiGraph. I Participants will wear the device during waking hours for 7 consecutive days, except when bathing or swimming, on their non-dominant hip. Freedson cutpoints for light activity are defined as Light: 0 - 2,689 CPM.

Baseline, 12 and 24 weeks
ActiGraph measured sedentary behavior
Time Frame: Baseline, 12 and 24 weeks

Sedentary behavior will be measured using the ActiGraph. Participants will wear the device during waking hours for 7 consecutive days, except when bathing or swimming, on their non-dominant hip. Freedson cutpoints for sedentary behavior are defined as <100 CPM.

Baseline, 12 and 24 weeks
Godin Leisure Time Exercise Questionnaire
Time Frame: Baseline, 12 and 24 weeks

Participants will be asked to indicate frequency of participation in strenuous (e.g., jogging), moderate (e.g., fast walking), and mild (e.g., easy walking) exercise over the past 7 days and average time spent in each activity. Activity frequencies will be multiplied by 9, 5, and 3 metabolic equivalents, respectively, and summed to create a total leisure time activity score. Weekly minutes of total, light, moderate, and vigorous activity will be calculated by multiplying the frequency and time of each activity. This value will be divided by 7 to obtain daily averages.

Baseline, 12 and 24 weeks
Short Physical Performance Battery (SPPB) Total Score
Time Frame: Baseline, 12 weeks, 24 weeks

The SPPB score is based on timed measures of gait speed, ability to rise from a chair, and standing balance. Gait speed will be measured using the better of two recorded times over a 4-meter course. Chair stand time will be measured as the time needed to rise five times from a seated position in a chair, with arms folded across the chest. For the balance test, participants will be asked to maintain their feet side-by-side, semi-tandem, and tandem positions for 10 seconds each. Each individual performance measure will be scored according to established cut points and aggregated for a total SPPB score.

Baseline, 12 weeks, 24 weeks
PROMIS Physical Function
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure physical function with 4 items over the past 7 days. Items are combined using a t-score metric where higher score is better.

Baseline, 12 and 24 weeks
PROMIS Anxiety
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure Anxiety with 4 items over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks
PROMIS Depression
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure Depression with 4 items over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks
PROMIS Fatigue
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure Fatigue with 4 items over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks
PROMIS Ability to Participate in Social Roles and Activities
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure Ability to Participate in Social Roles and Activities with 4 items over the past 7 days. Items are combined using a t-score metric where the higher score is better.

Baseline, 12 and 24 weeks
PROMIS Sleep Disturbance
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure sleep disturbance with 4 items over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks
PROMIS Pain Interference
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure pain interference with 4 items over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks
PROMIS Pain Intensity
Time Frame: Baseline, 12 and 24 weeks

PROMIS-29 (Patient-Reported Outcomes Measurement Information System 29-item Profile) will be used to measure pain intensity with 1 item using a scale 1-10 over the past 7 days. Items are combined using a t-score metric where the lower score is better.

Baseline, 12 and 24 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Collaborators

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

January 1, 2027

Primary Completion (Estimated)

January 1, 2031

Study Completion (Estimated)

June 15, 2031

Study Registration Dates

First Submitted

September 18, 2026

First Submitted That Met QC Criteria

September 18, 2026

First Posted (Actual)

September 25, 2026

Study Record Updates

Last Update Posted (Actual)

October 1, 2026

Last Update Submitted That Met QC Criteria

September 28, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • STU00224173
  • R01CA305818 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.