RecruitingBehavioural interventionExercise in Prostate CancerThe goal of this clinical trial is to learn how exercise intervention affects circulating tumor cells (CTC) in men with advanced prostate cancer. The primary objective is to determine if an exercise intervention decreases CTCs in men with advanced prostate cancer. Participants will have baseline screening assessments, followed by 12 weeks of exercise intervention, and then follow-up assessments 12 weeks after the end of the exercise intervention.