The goal of this study is to see if a theory-based motivational letter can increase attendance at a one-year post-cardiac rehabilitation (CR) appointment in adults who have finished a CR program. The main question it aims to answer is:
• Can a theory-based motivational letter increase attendance at one-year follow-up appointments?
Researchers will compare participants who received the letter to those who received care as usual to see if there are any differences in attendance and risk factor management.
Participants will:
* Get a letter approximately 6 months before their one-year follow-up or care as usual
* Attend any appointments as usual
* Do routine health checks during their visits