Inclusion Criteria:  Age ≥60 years (conventional definition of older age in clinical trials of MN)80-82 Have a diagnosis of MN Receiving outpatient chemotherapy English speaking Eastern Cooperative Oncology Group (ECOG) performance status of 0-2 No medical contraindications for exercise per oncologist Able to walk 4 meters as part of Short Physical Performance Battery measured walk (with or without assistive device) Able to provide informed consent  Exclusion Criteria:  None