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

Inclusion Criteria:

• Adults of age ≥18 years
• Have completed the 12-week TCR program (including the 12 week final visit)
• Have a pre-booked 1-year visit marked in their TCR patient chart

Exclusion Criteria:

• Patient program status is listed as "discharged" or "deceased"