RecruitingBehavioural interventionDebunking the Frailty-sarcopenIa-ADT Axis in mEtastatic Prostate canceR With multiComponent Exercise: The FIERCE TrialThe purpose of this study is to determine whether a 16-week supervised, clinic-based circuit training intervention utilizing resistance and functional exercises and self-directed aerobic exercise will improve frailty and sarcopenic status and disease progression outcomes among pre-frail/frail metastatic prostate cancer patients receiving androgen deprivation therapy (ADT). The names of the study intervention involved in this study is: • Supervised circuit training (aerobic and resistance exercise regimen)