Discussion
cancer, colorectal and endometrial cancer
CANCER
This study provides an in-depth understanding of the salient dimensions that influence PABC amongst colorectal and endometrial cancer survivors in addition to the successful ingredients of the intervention. Key themes generated explained the active ingredients of the intervention (i.e., Fitbit as health coach) and the dimensions associated with PABC more generally: commitment, accountability/monitoring and routine.The study found clear differences in priorities between participants that successfully increased and maintained MVPA compared to those that did not. A commitment to PA appeared to be the foundation to successful PABC. Those that did not prioritise PA expressed lower motivation and presented more barriers to exercise. Similar findings were identified in a study on successful PA maintenance, where cancer survivors prioritised PA over other obligations [Participants that developed a PA routine appeared more likely to increase MVPA consistent with previous research [A further novel finding was the resistance to structure and planning, related to retirement and a desire for less structure where formal scheduling was rejected as a reminder of employment. Although successful participants developed a PA routine, most did not engage in formal action-planning, despite it being a core intervention component. Instead, participants used a combination of goal-setting, self-monitoring, Fitbit-derived feedback and review, to evaluate progress and change behaviour accordingly. Self-monitoring was the primary technique used to sustain motivation and PA.Reviews also support the role of self-monitoring for PABC [Finally, participants reliant on external accountability tended to be less successful in PABC. The desire for external accountability and monitoring to produce accountability in survivors has been reported elsewhere [