The total length of participation in this study is three months. Participants will be asked to exercise each day that they are an inpatient and well enough to participate. Participants will be encouraged to continue exercise and participation in the exercise program when they are outpatients, but it will not be required. Participants will fill out short questionnaires and be evaluated for quality of life, fatigue, physical strength, and medical and nutritional status four times: at the time of enrollment in the study, and at one, two, and three months after enrollment. The questionnaires will take about 15 minutes to complete.