Alternative Schedule Sunitinib in Metastatic Renal Cell Carcinoma: Cardiopulmonary Exercise Testing

Patients randomized to sunitinib schedule 4/2 will receive sunitinib at 50 mg daily for 4 weeks on, followed by 2 weeks off, per standard of care. Cardiopulmonary Exercise Testing (CPET) will be performed at baseline, 4 weeks and 12 weeks.

Patients randomized to sunitinib schedule 2/1 will receive sunitinib 50 mg daily for 2 weeks on, followed by 1 week off. Cardiopulmonary Exercise Testing (CPET) will be performed at baseline, 5 weeks and 12 weeks.