A Culturally-Tailored Mobile Health and Social Media Physical Activity Intervention for Improving Physical Activity in Hispanic or Latino/Latina Adolescent and Young Adult Childhood Cancer Survivors, Walking Juntos Study

Inclusion Criteria: * Patient must be ≥ 15 years and \< 21 years at the time of enrollment * First diagnosis of malignant neoplasm (International Classification of Diseases for Oncology \[ICD-O\] behavior code of "3") in first and continuous remission at the time of enrollment * Curative cancer treatment must have included chemotherapy (including cellular therapy) and/or radiation (including radioactive iodine). Note: Certain stem cell transplant procedures are excluded. Reminder: Children's Oncology Group (COG) therapeutic trial participation is not required * Completed all chemotherapy and/or radiation therapy in the last 3-36 months. This includes completion of all oral (e.g., tyrosine kinase inhibitors) and/or maintenance chemotherapy * Self-report of \< 420 minutes of moderate-to-vigorous physical activity per week as assessed and documented via the study-specific Physical Activity Worksheet. Note: See the case report forms packet on the COG study web page for the study specific Physical Activity Worksheet * Ambulatory and no known medical contraindications to increasing physical activity * No known significant physical or cognitive impairment that would prevent use of the electronic devices used for the protocol intervention (e.g., Fitbit, smartphone, tablet, or computer) * Able to read and write Spanish or English * Self-identify as Hispanic, Latino/Latina/Latinx Exclusion Criteria: * Patients with previous allogeneic hematopoietic stem cell transplant (HSCT) are ex…