RecruitingBehavioural interventionExercise for Tumor Suppressive Impact in Men With Prostate Cancer at High-Risk of Progression on Active Surveillance: The REMOVE TrialThe purpose of this study is to determine whether a 12-week, home-based, virtually supervised exercise program will slow cancer progression of prostate cancer among men with prostate cancer at high-risk of progression undergoing active surveillance. The name of the study intervention involved in this study is: Aerobic high-intensity interval training (HIIT) (training exercise intervention)