The goal of this clinical trial is to examine if one month of general health optimization before surgery for kidney tumors can help participants recover more quickly from surgery. The optimization process is called prehabiliation, and will last one month. It consists of 1. A comprehensive health assessment 2. Assisted smoking cessation 3. A home exercise program. The investigators will compare an intervention group receiving one month of prehabilitation with a control group receiving the standard of care. Some of the main questions the investigators want to answer are * Are participants in the intervention group more satisfied with their quality of recovery after surgery? * Do participants in the intervention group maintain more of their physical abilites compared to the control group?