Testing Multi-Level Remote Physical Activity Interventions in a National Sample of Older Women: The WHISH EnCore Trial

One year of continuing person-level physical activity promotion and health-related information delivered primarily by mail, email, and through online scientific video presentations and exploration of freely available citizen science mobile applications

One year of continuing person-level physical activity promotion and health-related information delivered primarily by mail and email, plus participatory citizen science activities involving neighborhood audits of the walking environment using a mobile app and remote group discussion and problem-solving around physical activity barriers