Telehealth Exercise Program for Cancer-Related Fatigue

Inclusion Criteria: 1\. Age ≥ 18 and \< 90 years of age. 2. Diagnosis of breast or prostate cancer. 3. Cancer treatment criteria: 3a. Completion of treatment with curative intent \> 3 months prior to and \< 5 years from study initiation. 3b. Treatment must include hormonal, radiation, chemotherapy, and/or immunotherapy. Those who have received only surgery are not eligible. 3c. Individuals diagnosed with breast cancer currently receiving maintenance hormonal therapy, with no planned treatment changes in the next six months, are eligible. 4\. Home zip code meeting Health Resources \& Services Administration (HRSA) definition of rural (data.hrsa.gov/tools/rural-health). 5\. Presence of at least moderate fatigue (\>3/10 per National Comprehensive Cancer Network guidelines). 6\. Access to high-speed home internet. 7. Possession of smartphone or laptop with front-facing camera. 8. Capable and willing to give informed consent. 9. Willing to participate in a 12-week telehealth exercise intervention or 12-week waiting period prior to intervention with brief remote physical assessments and dried blood spot collection every 2 weeks. 10\. Able and willing to provide contact information for a local support individual to assist with any possible adverse events. 11\. Able and willing to provide contact information for a local primary care provider to address medical issues potentially arising during study activities. 12\. Able to provide signed physician clearance for exercise if indicated by the Physical Activity Readiness Questionnaire (PAR-Q+) or National Comprehensive Cancer Network exercise safety screening questions. Exclusion Criteria: 1. Eastern Cooperative Oncology Group (ECOG) Performance Status Grade ≥ 2. 2. Current or planned cancer-related treatments (except maintenance hormonal therapies) in the next six months. 2a. For individuals with a prostate cancer diagnosis, those currently receiving androgen deprivation therapy (ADT), or those who have previously received ≥ 12 months of ADT, are not eligible. 3\. Plans to relocate to a non-rural location in the next six months. 4. Presence of a disease or condition that affects the ability of an individual to safely participate in an exercise intervention (e.g. recent cardiac event or chronic obstructive pulmonary disease). 4a. These conditions are identified in the PAR-Q+. 5. Presence or history of metabolic disease (e.g. diabetes or uncontrolled hyper- or hypothyroidism). 5a. Participants with pre-diabetes, metabolic syndrome, or diabetes managed with metformin only will be eligible, with this variable tracked for later analysis. 6\. Current participation in another exercise oncology program.