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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
512
Prescribed goals change daily based on participant's performance
Prescribed goals remain the same throughout study
Incentives are provided on bi-monthly basis for participation
Incentives are provided immediately for each goal attained
Arizona State University
Phoenix, Arizona, United States
Change in mean ActiGraph accelerometer-derived moderate-to-vigorous physical activity min/day (MVPA min/day) between study arms.
Time frame: 12 months
Change in mean ActiGraph accelerometer-derived moderate-to-vigorous physical activity min/day (MVPA min/day) across high walkable (vs. low walkable) neighborhoods by 12 months.
Time frame: 12 months
Change in mean ActiGraph accelerometer-derived moderate-to-vigorous physical activity min/day (MVPA min/day) across high walkable (vs. low walkable) neighborhoods by 24 months
Time frame: 24 months
Change in mean fitness (VO2max measured by treadmill test) between study arms.
Time frame: 12 months
Change in self-reported physical activity measured by the International Physical Activity Questionnaire (IPAQ).
Time frame: 12 months
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