Table 1 Feasibility questions

Recruitment

◦ How many participants were recruited each week?

◦ How long did it take to recruit the required sample?

◦ Why did eligibles decide to participate?

◦ If the required sample size was not reached, what could have been done differently?

◦ What are the barriers to successful recruitment within the research sites?

Retention

◦ How many of the study participants remained in the study as they moved through the intervention?

◦ At what point did drop-out occur?

◦ Why did participants decide to withdraw from the study?

◦ What are the barriers to successful retention?

Compliance

◦ How many of the participants got the full “dose” of the intervention?

◦ Were there particular components for which compliance was especially low?

◦ Why did participants not adhere to the intervention protocol (or not adhere to particular components)?

◦ What are the barriers to successful compliance?

Acceptability

◦ How satisfied were participants with the intervention?

◦ To what extent did participants feel overburdened by data collection demands?

◦ What did participants like and dislike about the intervention?

◦ What changes to the intervention protocol would make it more acceptable?

◦ What did participants most dislike about research-related aspects?

Safety

◦ How many adverse events occurred during the project?

◦ How many adverse events were related to testing or intervention?

◦ How many participants felt safe or unsafe during the project?

◦ Do the physiotherapists responsible for administering the intervention believe the design of the intervention protocol to be safe?

◦ What adverse events did occur?

◦ What made participants feel safe or unsafe during the project?

◦ What could have further prevented adverse events?

◦ What changes could have been made to further increase the safety of the intervention according to the administering physiotherapists?