Participant characteristics
| Participant | Venue* | Time since stroke (months) | MRS† | Age | Sex | Programme adherence categorisation‡ |
| Charles | 1a | 36 | 3 | 64 | M | High |
| Donald | 1a | 42 | 3 | 91 | M | High |
| James | 1a | 2 | 3 | 89 | M | High |
| Frank | 2 | 4 | 3 | 73 | M | Low |
| Betty | 2 | 18 | 3 | 56 | F | High |
| Peter | 2 | 120 | 2 | 77 | M | Low |
| Sally | 2 | 33 | 3 | 80 | F | High |
| Arnold | 2 | 13 | 2 | 59 | M | High |
| Catherine | 3 | 84 | 2 | 67 | F | Low |
| Sandra | 3 | 90 | 2 | 68 | F | Low |
*Venue relates to the different locations of ReTrain delivery: 1, Sports Hall, city; 2, Community Centre, town; 3, Church Hall, city.
†MRS, Modified Ranking Scale (measuring level of disability—higher value indicates greater disability).
‡Programme adherence category was derived from combined metrics (attendance registers and homework records): low (<50%), medium (50%–75%)) and high (>75%) adherence. For the interviews, we only sampled low-dose and high-dose participants.