Prehabilitation Protocol for Head and Neck Cancer Patients

This study is testing a prehabilitation program — exercise and nutrition coaching before cancer treatment begins — to help people with head and neck cancer prepare for and better tolerate radiation therapy or chemoradiation. **You may be eligible if...** - You are 18 to 80 years old - You have a diagnosis of non-metastatic squamous cell carcinoma of the head and neck (e.g., mouth, throat, voice box, or nasopharynx) - You are scheduled for curative radiation or chemoradiation treatment (surgery beforehand is still allowed) - Your medical team has cleared you for exercise - Your first treatment is not starting for at least 3 weeks - You speak English or Spanish **You may NOT be eligible if...** - Your cancer has already spread (metastatic) - You cannot complete the initial assessment or start the program before treatment begins - You have a reason your doctor says you cannot diet or exercise - You already do more than 150 minutes of moderate-to-vigorous exercise per week - You have dementia, a major psychiatric disorder, or a recent history of stroke, heart attack, or heart failure Talk to your doctor to see if this trial is right for you.