Feel the Move: A Micro-Randomized Trial of a Text-Based Expectation-Setting Intervention to Increase Physical Activity

NCT05582369 | Completed

• 1 other identifier: HUM00190301
• Study Type: interventional
• Target: 200
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of this research is to evaluate the impacts of an intervention that reminds people of the affective rewards of exercise on physical activity in adults of any activity level

Conditions

Physical Activity

Outcome Measures

Primary Outcomes (1)

• Calories burned in planned exercise session

  Calories burned during the four-hour time window when participants planned to exercise

  4 hours

Secondary Outcomes (2)

• Change from Baseline Expected Post-exercise affect at 9 weeks

  At study completion, 9 weeks after enrollment

• Change from Baseline in other affective attitude measures at 9 weeks

  At study completion, 9 weeks after enrollment

Study Arms (1)

Affective Rewards Messages

EXPERIMENTAL

Throughout the study, each week participants will be asked to plan two exercise sessions for the upcoming week, and will be asked to report on how they did with those plans at the end of the day when they planned to exercise. At the very beginning of the time window when they planned to exercise participants will be randomized with 40% probability to receive no message, 20% probability to receive a reminder to fill out the study questionnaire at the end of the day, and 40% probability to receive one of two types of affective rewards messages (active intervention). The two types are: 1) low-reflection messages written by participants at the beginning of the study, about the affective rewards of exercise they have previously experienced; and 2) high-reflection messages that prompt participants to reflect on the affective rewards of exercise and text back a response.

Behavioral: Affective Rewards Messages

Interventions

Affective Rewards Messages BEHAVIORAL

Messages about the affective rewards of exercise

Affective Rewards Messages

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• lives in the US
• years old or older
• desires to increase activity through structured exercise
• has an iPhone that can send/receive text messages and an Apple Watch

You may not qualify if:

• medically advised not to exercise

Sponsors & Collaborators

• University of Michigan: lead

Study Sites (1)

University of Michigan

Ann Arbor, Michigan, 48104, United States

Location

Related Publications (1)

• Mishra SR, Dempsey W, Klasnja P. A Text Messaging Intervention for Priming the Affective Rewards of Exercise in Adults: Protocol for a Microrandomized Trial. JMIR Res Protoc. 2023 Sep 1;12:e46560. doi: 10.2196/46560.

  PMID: 37656493 DERIVED

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Model Details: At each decision point-operationalized as the beginning of the time window during which a participant planned to exercise-each participant will be randomized to receive one of three intervention options: active intervention (text messages aimed to prime expectations of emotional rewards of exercise), a control message (a reminder that they will receive a study questionnaire later in the day), or no intervention.

Study Record Dates

• First Submitted: September 21, 2022
• First Posted: October 17, 2022
• Study Start: May 31, 2023
• Primary Completion: November 1, 2023
• Study Completion: November 30, 2023
• Last Updated: June 25, 2024

Record last verified: 2024-06

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)