Primary outcome measures
The feasibility of implementing the intervention was determined by:The number of volunteers recruited, trained, and retainedThe number of older adults recruitedThe number of physical activity sessions delivered, and proportion completed by participants (adherence)The acceptability of the intervention, including barriers and facilitators, were determined through semi-structured interviews with older adults, their family members, volunteers, and club staff. Participants were selected by purposive sampling to ensure a wide range of views regarding the implementation of the intervention, including male and female participants, different clubs, and a representative age range. Interviews were conducted by SJM within the first 2 months and towards the end of the study (6 months) to ensure participants views were captured during the earlier stages of the intervention, and when the groups were well established. The interview schedules were underpinned by normalisation process theory (NPT) [