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Motivating Activity Through Text Communications - Helping Adults Increase Movement (MATCH AIM)

30 juli 2026 bijgewerkt door: David Conroy, University of Michigan

Motivating Activity Through Text - Comparing Human and AI Messages (MATCH AIM) Trial

The goal of this clinical trial is to compare the effect of different types of text messages on physical activity levels of middle-aged and older adults and to determine whether these messages are effective in adults age 40 and older who are engaging in less than 90 minutes per week of moderate or higher intensity physical activity. The main questions it aims to answer are:

  • Which types of motivational messages show the greatest effects on changes in daily step counts in a 3-month precision text messaging intervention?
  • What are the effects of personalized text messages on automatic affective evaluations, habit strength (experienced automaticity), exercise identity, working memory capacity, and processing speed?

Participants will:

  • Wear a Fitbit activity tracker continuously for 3 months and are encouraged to continue wearing it through 6 months.
  • Wear an activPAL activity monitor on their thigh for 7-day assessment periods at the beginning of the study, at 3 months, and at 6 months.
  • Complete 3 cognitive assessments ("brain games") per day on their smartphone during the 7-day assessment periods at baseline, 3 months, and 6 months.
  • Be asked to set goals to increase their daily steps over the first 3 months of the study.
  • Receive up to 4 motivational text messages per day for 3 months to encourage physical activity.
  • Keep study-related apps (Fitbit app, AIM app, MetricWire app) open in the background on their smartphone.
  • Complete questionnaires at the beginning of the study, at 3 months, and at 6 months

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

150

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Verenigde Staten
    • Michigan
      • Ann Arbor, Michigan, Verenigde Staten, 48109
        • Werving
        • University of Michigan
        • Hoofdonderzoeker:
          • David E Conroy, PhD
        • Contact:
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Be 40 years of age or older
  • Own a smartphone running an Android or iOS operating system
  • Have proficiency with the English language
  • Be capable of providing informed consent
  • Be able to perform moderate physical activity without restrictions
  • Be willing to complete the entire 6-month protocol
  • Be willing to establish a 12-hour window - beginning no later than 9:45 am and ending no later than 9:45 pm - for receiving text messages.

Exclusion Criteria:

  • Residing outside of the continental United States
  • Self-reporting 90 minutes or more of moderate-to-vigorous intensity physical activity per week
  • contraindications to normal physical activity as identified on the Physical Activity Readiness Questionnaire (PAR-Q)
  • Mobility restrictions that interfere with unassisted physical activity
  • Being pregnant or planning to become pregnant during the study
  • Planning to undergo surgery during the course of the study protocol
  • Having a prior diagnosis of Alzheimer's disease or a related dementia
  • Evidence of mild cognitive impairment as indicated by a mini-Montreal Cognitive Assessment (MoCA) test score of 12 or higher
  • Concurrent participation in another study involving weight loss or physical activity
  • Failure to respond to at least 85% of Ecological Momentary Assessment (EMA) prompts during the 7-day qualification phase.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Ander
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Actieve vergelijker: Validated library of text messages
Participants in this arm will receive motivational text messages that have been written and used in previous studies.
Gedragsmatig: Text Messaging Intervention

Participants will receive up to 4 motivational text messages per day during a self-selected 12-hour window. These messages focus on two content areas: 1) Move more, and 2) sit less. Delivery of these messages occurs in two phases:

  1. Random AIM (month 1): Messages are sent at random times within the participant's window to collect baseline data on their behavioral responses.
  2. Precision AIM (months 2 and 3): Messages are sent at optimized times based on person-specific models that are created from the individual's previous responses to text messages from month 1.
Experimenteel: Newly created text messages
Participants in this arm will receive motivational text messages that have not been used in previous studies.
Gedragsmatig: Text Messaging Intervention

Participants will receive up to 4 motivational text messages per day during a self-selected 12-hour window. These messages focus on two content areas: 1) Move more, and 2) sit less. Delivery of these messages occurs in two phases:

  1. Random AIM (month 1): Messages are sent at random times within the participant's window to collect baseline data on their behavioral responses.
  2. Precision AIM (months 2 and 3): Messages are sent at optimized times based on person-specific models that are created from the individual's previous responses to text messages from month 1.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Daily Step Count
Tijdsspanne: The activPAL is worn on the thigh for a 7-day assessment period before the intervention begins (baseline), after 3 months of intervention, and then again 3 months after the intervention is complete. The total time frame is 6 months.
The primary outcome measure is the average daily step count, which is assessed using a blinded, research-grade activPAL activity monitor, worn on the thigh for a 7-day assessment period.
The activPAL is worn on the thigh for a 7-day assessment period before the intervention begins (baseline), after 3 months of intervention, and then again 3 months after the intervention is complete. The total time frame is 6 months.

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Mechanisms of Behavior Change for Adherence: Habit Strength
Tijdsspanne: These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Habit Strength will be assessed using the Behavioral Automaticity Index from the Self-Report Habit Index to measure how automatic the exercise behavior has become. Scores are calculated as the average item responses and range from 1 to 7 with higher scores reflecting greater experienced automaticity (i.e., stronger habits).
These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Mechanisms of Behavior Change for Adherence: Exercise Identity (Reflective)
Tijdsspanne: These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Exercise Identity will be assessed using the Exercise Identity Scale to see how much participants view themselves as "exercisers". Scores are based on the average item response and range from 1 to 7 with higher scores representing a stronger exercise identity.
These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Mechanisms of Behavior Change for Adherence: Automatic Affective Evaluations
Tijdsspanne: These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Automatic Affective Evaluations will be assessed using a Single-Category Implicit Association Test (SCIAT) to assess non-conscious attitudes toward physical activity. Scores are standardized mean differences of response times between blocks of trials where physical activity is paired with unpleasant attributes and blocks of trials where physical activity is paired with pleasant attributes. Higher scores indicate more favorable automatic affective evaluations of physical activity.
These secondary outcomes are collected at the same major time points as the primary outcome: baseline (month 0), post-intervention (month 3), and follow-up (month 6).
Ambulatory Cognitive Function: Processing Speed
Tijdsspanne: These secondary outcomes are collected at the same major time points as the primary outcome: Baseline (month 0), post-intervention (month 3), and follow-up (6 month).
Processing Speed will be assessed with the Mobile Monitoring of Cognitive Change (M2C2) Symbol Search Task. Scores are based on response times for accurate trials so there is no fixed range for scores. Shorter response times indicate faster (better) processing speed; longer response times indicate slower (worse) processing speed.
These secondary outcomes are collected at the same major time points as the primary outcome: Baseline (month 0), post-intervention (month 3), and follow-up (6 month).
Ambulatory Cognitive Function: Working Memory Capacity
Tijdsspanne: These secondary outcomes are collected at the same major time points as the primary outcome: Baseline (month 0), post-intervention (month 3), and follow-up (6 month).
Working Memory Capacity will be measured using the M2C2 Grid Memory Task. Scores are based on response accuracy measured as a Euclidean distance score. Shorter distance scores indicate more working memory capacity; longer distance scores indicate less working memory capacity.
These secondary outcomes are collected at the same major time points as the primary outcome: Baseline (month 0), post-intervention (month 3), and follow-up (6 month).

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

University of Michigan

Medewerkers

National Institute on Aging (NIA)

Onderzoekers

  • Hoofdonderzoeker: David E Conroy, PhD, University of Michigan

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

11 mei 2026

Primaire voltooiing (Geschat)

3 mei 2027

Studie voltooiing (Geschat)

2 augustus 2027

Studieregistratiedata

Eerst ingediend

4 mei 2026

Eerst ingediend dat voldeed aan de QC-criteria

11 mei 2026

Eerst geplaatst (Werkelijk)

18 mei 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

31 juli 2026

Laatste update ingediend die voldeed aan QC-criteria

30 juli 2026

Laatst geverifieerd

1 juli 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • HUM00262651
  • P30AG086637 (Subsidie/contract van de Amerikaanse NIH)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

De-identified individual participant data (IPD) underlying the results reported in primary and secondary publications will be shared. This includes baseline behavioral metrics, coarsened demographics, post-intervention outcomes, and follow-up data. To protect participant privacy, all data will be stripped of direct identifiers, ages will be binned into 5-to-10-year bands, geographic markers restricted to broad regions, and timeline dates converted to "days since randomization." Raw, free-text qualitative journal entries will be suppressed entirely due to re-identification risks.

IPD-tijdsbestek voor delen

Data and supporting documentation will be made available concurrently with the primary peer-reviewed publication of the trial results and will remain accessible for 5 years post-publication. This immediate availability complies with the NIH Data Management and Sharing Policy.

IPD-toegangscriteria voor delen

Access is restricted to qualified external researchers affiliated with an accredited academic or non-profit research institution. Applicants must submit a formal, written research proposal detailing a sound scientific hypothesis and an analytical plan, alongside documentation of local IRB approval/waiver. Approved requestors and their sponsoring institutions must sign a legally binding Data Use Agreement (DUA) that strictly prohibits any re-identification or external data-linking attempts.

IPD delen Ondersteunend informatietype

  • LEERPROTOCOOL
  • SAP
  • ICF

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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