This prospective cohort study investigates physical frailty, assessed by the Short Physical Performance Battery (SPPB), in patients evaluated for kidney transplantation. The study aims to compare SPPB scores before listing, annually during the waiting period, and after transplantation at 6 and 12 months. It also includes a control group of dialysis patients not eligible for transplantation to evaluate differences in physical performance. The goal is to understand how frailty impacts transplant outcomes and patient recovery.