OUTLINE: Patients undergo a baseline evaluation in week 1 focusing on basic demographics, health, physical function and quality-of-life assessments. These assessments include the Short Physical Performance Battery (SPPB); the Hand Grip Test of Muscular Strength; the Demographics and Physical Activity History; the Functional Assessment of Cancer Therapy (FACT-Leu); the Distress Thermometer; the Short-form Positive Affect Schedule (PANAS-SF); the Satisfaction with Life Scale (SWL); the FAST-23 Disability Measure; the Center for Epidemiologic Studies Depression Scale Short Form (CES-D); the Self-efficacy for Physical Activity Scale; the Intervention Feedback Form; and the Pre-Post Session Ratings. Some medical data may be obtained from the patient's medical record to assist in these assessments.