 Recruitment will take place at the treatment or follow-up consultation with the medical or radiation oncologist. Interested survivors will receive an information package from the oncologist and a follow-up telephone call from the project director who will explain the study further and answer any questions. All individuals who are interested in participating in the study will: a be asked to provide informed consent, b complete a self administered questionnaire, and c be scheduled for a maximal physical fitness test, a dual-x-ray absorptiometry DEXA scan, and a blood draw. The physical fitness test will determine final eligibility for the study. 