Inclusion Criteria:  Adolescent and young adult inclusion criteria will be as follows:  males and females diagnosed with cancer; treated at Penn State Health Children's Hospital or Penn State Cancer Institute, Milton S. Hershey Medical Center; at least 1 year and up to 5 years post-cancer treatment; being aged between 10 to 17 years old at enrollment; being able to speak, read and understand the English language; adolescents and young adults have to be able to assent, and parents/guardians have to be able to consent to the study in an informed manner; Parent fluency in written and spoken English; Adolescents and young adults or their parents must have access to a phone or Zoom  Note: The agreement of the attending oncologist will be required for the participation of adolescents and young adults eligible for this study.  Exclusion Criteria:  Adolescent and young adult exclusion criteria will be as follows:  Received follow-up at a location other than Penn State Health Children's Hospital or Penn State Cancer Institute, Milton S. Hershey Medical Center; Evidence in the medical record of an absolute contraindication for physical activity; cardiac exclusion criteria: Class II, III or IV heart failure as defined by the New York Heart Association (NYHA) functional classification system, history of acute coronary syndromes, uncertain or uncontrolled arrhythmia, uncontrolled hypertension, syncope, acute myocarditis, pericarditis, or endocarditis, acute pulmonary embolus or pulmonary infarction, thrombosis of lower extremities, suspected dissecting aneurysm, pulmonary edema, respiratory failure, acute non-cardiopulmonary disorder that may affect exercise performance or be aggravated by exercise, mental impairment leading to inability to cooperate; History of refractory or recurrent diseases Already meeting physical activity guidelines.