Smart Walk: A Culturally Tailored Smartphone-Delivered Physical Activity Intervention for African American Women

Inclusion Criteria: * Self-reported African American/Black female * Aged of 24-65 years * Insufficiently Active (\< 60 minutes of moderate-to-vigorous physical activity per week as measured by Exercise Vital Sign Questionnaire) * BMI \> 25 kg/m2 * English speaking and reading * Ownership of a smartphone with the ability to download applications (i.e., apps) * Ownership of a smartphone with the ability to receive text messages * Willingness to receive a physical activity intervention delivered through their smartphone * Willingness to include their first name or create an alias to be used on their profile page on the Smart Walk app Exclusion Criteria: * Plans to relocate out of Phoenix area in next 12 months * Endorsing an item on the Physical Activity Readiness Questionnaire (PAR-Q), unless a doctor's note for study participation in provided * Resting systolic blood pressure greater than 180 mmHG and/or a diastolic blood pressure greater than 120 mmHG , as assessed at baseline or at any other study assessment * Self-reported participation in another diet or weight loss study at screening * Pregnant or planning to become pregnant in the next 12 months