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Completed

NCT Number: NCT02053259

A Walking Intervention Through Text Messaging

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.

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Key information

Conditions

Physical Activity Behavior Body Weight Motor Activity Nutrition Disorders Nutritional and Metabolic Diseases Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Arizona State Univertsity, School of Nutrition and Health Promotion

Phoenix, Arizona, 85004, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

Adaptive Goals

Behavioral

Reinforcement

Behavioral

Static Goals

Behavioral

Primary outcomes

  1. Change in Fitbit-measured Steps/Day and Moderate-to-vigorous Physical Activity Between Study Arms.

    Time frame: 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

  1. Change in Fitness (VO2max) Between Study Arms.

    Time frame: Baseline and 4 months

  2. Changes in Body Mass Index and Body Composition Measured by Dual-energy X-Ray Absorptiometry (DEXA) Between Study Arms.

    Time frame: Baseline and 4 months

  3. Changes to iAortic Pulse Wave Velocity Assessed With the SphymocorTM Between Study Arms.

    Time frame: Baseline and 4 months

  4. Changes to Cardiovascular-disease (CVD) Risk and Inflammatory Markers (e.g. Glucose, Insulin, Lipids, Adhesion Molecules and Hemostatic Factors) Between Groups.

    Time frame: Baseline and 4 months

  5. Changes to Self-reported Physical Activity Measured by the International Physical Activity Questionnaire (IPAQ).

    Time frame: Baseline and 4 months

Sponsors and collaborators

Lead sponsor

Arizona State University

Other

Registry information

Official study title

Walking Intervention Through Texting Study: A Factorial Trial

Acronym: WalkIT

Important dates

Study start
2014
Primary completion
2014
Study completion
2018
First posted
Feb 3, 2014
Registry last updated
Sep 22, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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