Atherosclerotic cardiovascular disease (ASCVD) is the leading cause of morbidity and mortality in the United States (US). Regular physical activity has been demonstrated to reduce the risk of ASCVD and is associated with a number of other health benefits. Yet, less than 50% of adults in the US achieve enough physical activity to actually obtain these benefits. Insights from behavioral economics have been shown to both better reflect the 'predictable irrationality' of humans and to be effective in designing interventions that achieve sustained improvements in health behavior. Our prior work has demonstrated that interventions using financial incentives and gamification can leverage principles from behavioral economics to increase physical activity during 3-month interventions and sustain effects in 3-month follow-up periods. These findings warrant further investigation of longer-term effects. In this study, we conduct a four-arm randomized, controlled trial to evaluate the effectiveness of using behavioral economic approaches including gamification, financial incentives, or both to increase physical activity among patients with elevated risk for atherosclerotic cardiovascular disease during a 12-month intervention with a 6-month follow-up.
