No_intervention: Control group

The control group will consist of patients with bladder or kidney cancer receiving standard care, which includes a comprehensive assessment by an oncogeriatrician followed by surgery approximately 4 weeks later. Postoperatively, patients will be transferred to a rehabilitation center (SSR) for recovery, in line with standard clinical practice.~As part of the study protocol, control group patients will undergo additional follow-up assessments alongside their usual care. These follow-ups-conducted at baseline, and at 1, 2, 3 months, and at the final endpoint-will mirror those of the intervention group. They will include patients- completed questionnaires and physical assessments conducted by an adapted physical activity teacher.

Experimental: Interventional group

The interventional group will consist of bladder and kidney cancer patients who will follow a personalized 6-month care pathway in addition to standard care. This pathway includes:~* 2 adapted physical activity (APA) sessions per week for 4 weeks prior to surgery~* 2 APA sessions/ week for 4 weeks following surgery~* Therapeutic education workshops tailored to individual needs, covering topics as physical activity, nutrition, treatments, fatigue, and relaxation~* Referral to the department's DAPAP for a 12-week bridge program, consisting of one APA session per week.~The study will be conducted in the oncogeriatrics departments of Saint-Etienne University Hospital and Loire Private Hospital.