Type 2 diabetes mellitus (T2DM) can be prevented through weight loss and increased physical
activity, yet its prevalence continues to rise. This trend may be due in part to low rates of
participation in evidence-based lifestyle change programs such as the Diabetes Prevention
Program (DPP). New strategies are needed to promote healthy behaviors among individuals at
risk for T2DM, and mobile health technologies may be an effective and scalable approach to
achieve this. One promising tool is JOOL Health, a mobile phone-based application that
leverages principles from Self-Determination Theory to help individuals understand how
certain behaviors (e.g. sleep, diet, physical activity) influence their ability to pursue
their core values and purpose in life. Through personalized messaging and feedback, JOOL
Health aims to increase autonomous motivation, a form of motivation closely associated with
the initiation and maintenance of healthy behaviors.
In this mixed methods pilot randomized controlled trial, the investigators will test whether
the JOOL Health mobile phone-based application -- used alone and in conjunction with other
mobile health technologies to track weight and physical activity -- can increase autonomous
motivation to prevent type 2 diabetes mellitus (T2DM) among individuals with prediabetes who
previously declined participation in a Diabetes Prevention Program (DPP).