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A Walking Intervention Through Text Messaging

NCT02053259 — Not applicable, Completed, 96 participants, Arizona State University

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Walking Intervention Through Texting Study: A Factorial Trial

RegistryNCT02053259, acronym WalkIT
StatusCompleted
PhaseNot applicable
Study typeInterventional; randomized, factorial, masking: single, prevention
Enrollment96 (Actual)
SponsorArizona State University (Other)
ConditionsPhysical Activity, Behavior, Overweight, Motor Activity
InterventionsAdaptive Goals, Reinforcement, Static Goals (Behavioral)
Datesstart 2014-02-01, primary completion 2014-12-01, completion 2018-12-01, first posted 2014-02-03, last updated 2021-09-22
Locations1 site in United States

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-Summary

The purpose of this study is to develop and evaluate adaptive goal setting and feedback interventions (Adaptive Interventions) to promote physical activity behaviors and compare it to static physical activity interventions (Static Interventions) using two levels of goal setting (Adaptive Goals vs. Static Goals) and two levels of reinforcement procedures (Praise/Rewards and No Praise/Rewards) in a 2 x 2 factorial randomized controlled trial. All four groups will receive the intervention via a semi-automated text message system developed by the investigators study team.

The primary aim of this study will be to:

1. Evaluate whether the adaptive interventions result in greater change in physical activity (pedometer-measured steps/day) compared to the static Intervention groups. HYPOTHESES: Participants in the adaptive interventions will increase their steps/day more than participants in the Static Intervention groups. The Adaptive Goals and Reinforcement Group will outperform the other 3 groups.

The secondary aims of this study will be to:
2. Evaluate the effectiveness of the adaptive and static goal interventions in improving anthropometric, cardiovascular fitness, and cardiometabolic risk factors. HYPOTHESES: Participants in the adaptive interventions will show greater improvements in fitness, lean and fat body mass, and serum biomarkers than participants in the Static Intervention groups. The Adaptive Goals and Reinforcement Group will outperform the other 3 groups.
3. to assess participants' satisfaction with the overall program.

Expand all sections  ·  Collapse all

+Arms and interventions

ArmTypeInterventionsDescription
Adaptive Goals with Immediate ReinforcementExperimentalBehavioral: Adaptive Goals; Behavioral: ReinforcementAdaptive Physical Activity Goals, Immediate Financial Reinforcement
Adaptive Goals with Delayed ReinforcementExperimentalBehavioral: Adaptive GoalsAdaptive Physical Activity Goals, Delayed Financial Reinforcement
Static Goals with Immediate ReinforcementExperimentalBehavioral: Reinforcement; Behavioral: Static GoalsStatic Physical Activity Goals, Immediate Financial Reinforcement
Static Goals with Delayed ReinforcementActive comparatorBehavioral: Static GoalsStatic Physical Activity Goals, Delayed Financial Reinforcement
  • Adaptive Goals (Behavioral)
  • Reinforcement (Behavioral)
  • Static Goals (Behavioral)

+Outcome measures

Primary outcomes

  • Change in Fitbit-measured Steps/Day and Moderate-to-vigorous Physical Activity Between Study Arms. [Daily for 4 months]: Given this study used a 2 condition (adaptive vs. static goals) x 2 condition (immediate vs. delayed financial reinforcement) randomized factorial design we report main effects for each condition. Sample sizes for main effects will be 96 participants for each comparison (Adaptive vs. Static goals or Immediate vs. Delayed Reinforcement) as the other condition. Consistent with proper analyses of factorial designs, main effects for the goal setting conditions pool participants across reinforcement conditions, and main effects for reinforcement conditions pool participants across goal setting conditions.

Secondary outcomes

  • Change in Fitness (VO2max) Between Study Arms. [Baseline and 4 months]
  • Changes in Body Mass Index and Body Composition Measured by Dual-energy X-Ray Absorptiometry (DEXA) Between Study Arms. [Baseline and 4 months]
  • Changes to iAortic Pulse Wave Velocity Assessed With the SphymocorTM Between Study Arms. [Baseline and 4 months]
  • Changes to Cardiovascular-disease (CVD) Risk and Inflammatory Markers (e.g. Glucose, Insulin, Lipids, Adhesion Molecules and Hemostatic Factors) Between Groups. [Baseline and 4 months]
  • Changes to Self-reported Physical Activity Measured by the International Physical Activity Questionnaire (IPAQ). [Baseline and 4 months]

+Eligibility

Sex: All, ages: 18 Years to 60 Years, accepts healthy volunteers

Inclusion Criteria:

* women and men of all races/ethnicities living in Maricopa County, Arizona.

Exclusion Criteria:

* be between 18 and 60 years old
* currently not exceeding physical activity recommendations determined by the International Physical Activity Questionnaire (IPAQ short form).
* not have a medical condition based on the Physical Activity Readiness Questionnaire for Everyone (PAR-Q+) that requires supervised physical activity
* not taking medication(s) that would prohibit a moderate intensity physical activity program
* have a body mass index between 25 and 55 kg/m2
* not be currently pregnant or planning to become pregnant in the next 4 months
* not be planning to leave Maricopa County for 10 days or more in the next 4 months
* not planning to move from Maricopa County in the next 4 months
* not currently in another physical activity, diet, or weight loss program (e.g. weight watchers)
* have access to Microsoft Windows (XP, Vista, 7, 8) or Mac (10.5+) operating systems on computer with a USB port on a daily basis
* have daily access to email and the internet
* have a mobile phone with text messaging capabilities and be willing to send and receive up to 3-5 text messages per day.

+Posted results

Participant flow

MilestoneAdaptive Physical Activity Goals With Immediate ReinforcementAdaptive Physical Activity Goals With Delayed ReinforcementStatic Physical Activity Goals With Immediate ReinforcementStatic Physical Activity Goals With Delayed Reinforcement
Started25242423
Completed25242423
Not completed0000

Outcome results

  • Change in Fitbit-measured Steps/Day and Moderate-to-vigorous Physical Activity Between Study Arms. (Primary), Mean, steps: Adaptive Goals 9695 +/- 3948; Static Goals 9836 +/- 3930; Immediate Reinforcement 10562 +/- 4032; Delayed Non-contingent Reinforcement 8969 +/- 3802
  • Change in Fitness (VO2max) Between Study Arms. (Secondary)
  • Changes in Body Mass Index and Body Composition Measured by Dual-energy X-Ray Absorptiometry (DEXA) Between Study Arms. (Secondary)
  • Changes to iAortic Pulse Wave Velocity Assessed With the SphymocorTM Between Study Arms. (Secondary)
  • Changes to Cardiovascular-disease (CVD) Risk and Inflammatory Markers (e.g. Glucose, Insulin, Lipids, Adhesion Molecules and Hemostatic Factors) Between Groups. (Secondary)
  • Changes to Self-reported Physical Activity Measured by the International Physical Activity Questionnaire (IPAQ). (Secondary)

Adverse events

Time frame: Continuously over the course of the 4-month intervention period.

ArmDeathsSerious adverse eventsOther adverse events
Arm 100/25 (0.0%)0/25 (0.0%)
Arm 200/24 (0.0%)0/24 (0.0%)
Arm 300/24 (0.0%)0/24 (0.0%)
Arm 400/23 (0.0%)0/23 (0.0%)

Limitations and caveats: Not all of the secondary outcome data have been analyzed and some results are pending review by a journal.

+Locations (1)

FacilityCityCountryStatus
Arizona State Univertsity, School of Nutrition and Health PromotionPhoenix, ArizonaUnited States

+Publications

  • Hurley JC, Hollingshead KE, Todd M, Jarrett CL, Tucker WJ, Angadi SS, Adams MA. The Walking Interventions Through Texting (WalkIT) Trial: Rationale, Design, and Protocol for a Factorial Randomized Controlled Trial of Adaptive Interventions for Overweight and Obese, Inactive Adults. JMIR Res Protoc. 2015 Sep 11;4(3):e108. doi: 10.2196/resprot.4856. PMID 26362511
  • Results publication: Adams MA, Hurley JC, Todd M, Bhuiyan N, Jarrett CL, Tucker WJ, Hollingshead KE, Angadi SS. Adaptive goal setting and financial incentives: a 2 x 2 factorial randomized controlled trial to increase adults' physical activity. BMC Public Health. 2017 Mar 29;17(1):286. doi: 10.1186/s12889-017-4197-8. PMID 28356097
  • Results publication: Phillips CB, Hurley JC, Angadi SS, Todd M, Berardi V, Hovell MF, Adams MA. Delay Discount Rate Moderates a Physical Activity Intervention Testing Immediate Rewards. Behav Med. 2020 Apr-Jun;46(2):142-152. doi: 10.1080/08964289.2019.1570071. Epub 2019 Apr 11. PMID 30973315

My Notes