Implement prehabilitation prescription protocol and evaluate the feasibility and acceptability of the prehabilitation prescription protocol in a sample of HNC patients. 1. Age 18 to 80 years old 2. Patients with a diagnosis of non-metastatic squamous cell carcinoma originating in the head and neck (oral cavity, oropharynx, hypopharynx, larynx, and nasopharynx). 3. Patients with a plan for curative radiation therapy (RT) / chemoradiation therapy (CRT) at SCCC* - *Patients who underwent surgery for the HNC are still eligible. 4. Clearance for exercise by the medical team. 5. Patients who do not have their first treatment scheduled within 3 weeks at the time of recruitment. 6. An English or Spanish speaker. Aim 2

1. A patient with a metastatic cancer. 2. A patient who cannot complete the baseline assessment and/or start prehabilitation by the initiation of RT/CRT. 3. Any contraindication for diet change or exercising as determined by a physician. week for the prior month. 4. A patient who is not an English or Spanish speaker. 5. History of dementia or major psychiatric disease which would interfere with study. 6. History of recent (≤1 yr) stroke, myocardial infarction, or congestive heart failure 7. Eastern Cooperative Oncology Group (ECOG) equal to or higher than 2.