Details of semi-structured interviews
| Interview | Group sampled | Number sampled | Sampling | Date | Aim |
| Post-intervention feedback on the mHealth intervention | mHealth Intervention only | 2–3 each site (total n=12–20) | Minimum inclusion of at least one self-identified male and female in each group | Approximately 1 week after CR completion | Guided discussion will aim to learn about experiences (barriers, facilitators, actual use of tech and coach, receptivity to coach, perceived appropriateness, suggestions for improvement) with the intervention (both technological aspects but also exercise prescription and counselling). |
| Post intervention feedback on the acceptability of the research process | mHealth Intervention Active control | 2–3 each site 2–3 each site (total n=12–20) | Minimum inclusion of at least one self-identified male and female in each group | Approximately 1 week after CR completion | Guided discussion will aim to learn about experiences (willingness to do again, refer others, perceived appropriateness, respect, dignity, confidentiality, suggestions for improvement) with recruitment, randomisation and the research process. |