Data collection
The interview guide was semi-structured and contained open-ended questions informed by the TDF (Additional File Participants were contacted during their final week in the exercise prehabilitation program (i.e., the week before surgery) and were invited to participate in an interview at a time convenient to them. Interviews were conducted by trained clinical research assistants (KD, CS). Interviews were conducted by telephone, were digitally recorded and transcribed verbatim. The interviewers verified the content for accuracy. Any information that could potentially identify the participant was removed from the transcripts. The interviews ranged in length between 4 and 10 min. Transcripts were uploaded to and analyzed using NVivo 11 Software.