Supportive Training After Cardiac Rehabilitation Including Virtual Engagement

The investigators propose a randomized clinical trial in which the "STRIVE" control group will receive the Trainerize mobile app for (1) daily self monitoring of exercise, blood pressure, and weight; (2) education via weekly text messages; and (3) assigned monthly videos on various health topics. The "STRIVE +" intervention group will receive the same app for self-monitoring and education via text messages as the control group PLUS individually-tailored virtual coaching with goal-setting and social support/networking. Our specific aims are to: Aim 1: Determine the effect of virtual coaching and social support on adherence to physical activity (PA; measured by objective step counts) in the intervention vs. control groups; secondary measures will be amount of sedentary time, functional fitness, and self-reported exercise. Hypothesis 1: The intervention group will have more PA steps and self-reported exercise, less sedentary time, and higher functional fitness compared to the control group. Aim 2: Determine the effect of virtual coaching and social support on psychosocial and social cognitive factors in the intervention vs. control groups. Hypothesis 2: The intervention group will have lower depression/loneliness and higher self-efficacy/perceived social support compared to the control group. Aim 2a: Evaluate the extent to which psychosocial and social cognitive factors mediate the effect of the intervention on PA adherence. Hypothesis 3: Lower depression/loneliness and higher perceived social support will mediate the effect of the intervention on PA adherence. Aim 3: Examine differences in CVD risk factors (blood pressure, lipids, HbA1c, BMI) between groups. H: The intervention group will have better control of risk factors at 6, 12, and 18 months compared to control.