A Intervention for Reducing Sedentary Behaviour Among Prostate Cancer Survivors

During the first two weeks (baseline), participants will be asked to maintain their regular movement routine to set a baseline daily average step count. Phases I-III will involve self-regulatory strategies (e.g., action planning), address reducing/interrupting sedentary time, and step counts. Participants will be encouraged to increase their steps by 1000 steps/day from the baseline phase during each subsequent phase (i.e., 3000 steps above baseline by Phase III). Phases IV-V will be a maintenance phase through which participants will be encouraged to maintain 3000 steps per day above baseline. The sessions will be grounded within the Multi-Process Action Control Framework and address perceived capability/opportunity and instrumental/affective attitudes. The 1-on-1 sessions will focus on regulation (action \& coping planning, social support, goal setting) and reflexive processing (self-regulation, habit). The final one on one session will be a booster session to revisit previous topics.

Participants will be provided with a FitBit Inspire 2 and access to publicly available resources about active living. They will receive a FitBit orientation session with a movement specialist prior to the 12-week control period.