WalkIT Arizona: Walking Interventions Through Texting

WalkIT: Neighborhood Walkability and Moderation of Adaptive Walking Interventions

The purpose of this study is to develop adaptive (AI) and micro-incentive (MI) interventions and test them against static (SI) and delayed-incentive (DI) interventions in a 4-arm randomized factorial trial to increase MVPA adoption and maintenance among inactive adults. Using neighborhood walkability and socioeconomic status, participants will be recruited from four neighborhood types: "high walkable/high SES," "high walkable/low SES," "low walkable/high SES," and "low walkable/low SES." We will evaluate synergistic or antagonistic effects of interventions and neighborhood factors on MVPA adoption by 12 months and maintenance by 24 months.

Inclusion Criteria:

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

Exclusion Criteria:

• Live in one of the eligible neighborhood quadrants in Maricopa County, Arizona
• Adult men and women between 18 and 60 years old
• Inactive as screened by the International Physical Activity Questionnaire (IPAQ) short form and confirmed by baseline accelerometer measures
• No history of heart failure or type 2 diabetes
• No contraindications to exercise testing or requirement for medically supervised exercise (assessed by Physical Activity Readiness Questionnaire+ (PAR-Q+).
• Not currently pregnant and not planning to becoming pregnant in the next 2 years
• Not currently participating in physical activity, diet, or weight loss programs
• Daily access to a mobile phone with text messaging capabilities or an iOS or Android smartphone
• Willing to wear a small accelerometer on the wrist daily for 1 year
• Willing to send and receive 2-3 text messages per day for 1 year
• Not planning to be outside of Maricopa County for > 30 days consecutively in the next 2 years
• Not planning to move from their current home in the next 2 years