Impact of Cognitive Rehab and Physical Activity on Cognition in Patients With Metastatic Brain Tumors Undergoing RT

Rolling recruitment for the study. Participants will be randomized into one of three treatment arms. All treatment arms will undergo physical \& cognitive testing prior to whole-brain radiation therapy (WBRT)/stereotactic radiosurgery (SRS). Arm 3 will receive cognitive rehabilitation intervention sessions prior to, and concurrent with, WBRT/SRS. Approximately 14 days following WBRT/SRS: all arms will undergo physical and cognitive testing, and: Arm 1 will begin physical activity intervention. Arm 2 will begin physical activity intervention and cognitive intervention. Arm 3 will continue with cognitive intervention and begin physical activity intervention. All Arms will undergo physical and cognitive testing approximately 2.5 months post WBRT/SRS.