Atherosclerotic cardiovascular disease (ASCVD) is the leading cause of mortality in the United States. While increased physical activity can reduce this risk, less than half of adults in the United States meet the minimum recommendation guidelines for physical activity. Gamification, or the application of game design elements to non-game settings, has demonstrated promise in increasing physical activity when designed using insights from behavioral economics. However, the best way to design goal-setting within these interventions has not been well-examined. In this randomized controlled trial, the investigators will evaluate the effectiveness of four different goal-setting strategies within a gamification intervention to increase physical activity among adults with elevated risk for ASCVD. The trial will include a 2-week run-in period to estimate a baseline, followed by an 8-week introductory phase, an 8-week maintenance phase, and then after the intervention is completed an 8-week follow-up period.
