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Random Assignment of Intervention Messages for Developing Personalized Decision Rules to Promote Physical Activity

NCT03907683 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 82

Last updated 2022-11-04

Study results available
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Summary

Our goal is to develop personalized decision rules for selecting the frequency, timing, and content of messages to promote physical activity. The objective of this project is to develop personalized dynamical models of physical activity (PA) under different weather and temporal conditions as well as in response to different types of intervention messages. This approach relies on having extensive observations within the person under varying conditions to develop a dynamical model of how different conditions interact with each other to predict how behavior changes in response to text messages. Complementary sub-models will be estimated for each participant to describe their behavioral responses under different weather conditions. Healthy but insufficiently active young adults (n=80) will wear an activity monitor and receive a variety of randomly-timed and randomly-selected notifications via smartphone. GPS coordinates at the time of messages delivery and receipt are recorded and used to look up weather indices at that location at that time. The work is exploratory/descriptive as we will be developing models to describe participants' responses to messages under different weather conditions. This work is needed to develop the decision rules for a subsequent behavioral intervention that will be developed and tested in a future project.

Conditions

  • Cardiovascular Risk Factor

Interventions

BEHAVIORAL

Short Message with Text and Optional Image

Messages can be up to 256 characters of text and with or without an image. "Move more" and "sit less" messages were written to target established cognitive and affective constructs associated with physical activity (e.g., prompts to action plan, guidance for maximizing pleasure by regulating intensity).

Sponsors & Collaborators

  • Penn State University

    lead OTHER

Principal Investigators

  • David E Conroy, PhD · The Pennsylvania State University

Study Design

Allocation
NA
Purpose
PREVENTION
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
29 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-04-03
Primary Completion
2020-07-21
Completion
2020-07-21

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03907683 on ClinicalTrials.gov