Cardiac rehabilitation after a cardiac event or procedure is of key importance to physical and psychological recovery. Cardiac rehabilitation comprises a standardized stepwise approach to exercise in a supervised setting and is proven to reduce morbidity and mortality after a cardiac event. However, cardiac rehabilitation does not necessarily change behavior in the long-term and many do not attend cardiac rehabilitation due to lack of motivation, difficulty accessing programs, and cost. These individuals loose an important opportunity to improve their health, sense of well-being and outcomes. We propose to test the effect of a patient-centered approach to reduce sedentary behavior for aging adults added to usual cardiac rehabilitation. In this study, we will identify patients at their introductory visit to cardiac rehabilitation and randomize to either a program to decrease in-home sedentary behavior vs. a standard program to increase in-home exercise. Both groups will receive additional support and encouragement to attend cardiac rehabilitation. Using motivational interviewing techniques in both groups we will assist the patients in recognizing their potential and goal-setting. Patients will be monitored using the ActivPAL monitor, a new technology that quantifies sedentary time and steps/day. Patients will be monitored four times as they proceed through cardiac rehabilitation for a total of 13 weeks and receive 3 educational and goal setting sessions. Those in the intervention group will have sedentary behavior change emphasized with feedback from the ActivPAL monitor. The control group will focus on standard exercise recommendations and feedback from his/her exercise diary. Outcomes include change in sedentary time, steps/day. Anticipated results include a significant change in the intervention group vs. the control: a decrease in in-home sedentary time, an increase in steps/day. The results of this study will provide the basis for designing a larger randomized controlled trial to investigate the effects of an intervention to reduce sedentary behavior as an adjunct to cardiac rehabilitation especially for older adults. Additional investigation will be warranted for those who do not attend cardiac rehabilitation but are able to follow a post-cardiac event program to reduce in-home sedentary behavior.