A Simple Walking Program to Enhance Concurrent Chemoradiotherapy Delivery

Inclusion Criteria: * Age \> 18 * ECOG performance status 0-2 * Able to ambulate independently (without the assistance of a cane or walker) * Diagnosis of invasive malignancy of the brain, head and neck region, lung, gastrointestinal tract, or uterine cervix * Planned treatment with fractionated (≥15 treatments) external beam radiotherapy with concurrent chemotherapy (or cetuximab) with curative intent (including preoperative or postoperative treatment) * Women of childbearing potential must: * Have a negative serum or urine pregnancy test within 72 hours prior to the start of study therapy * Agree to utilize an adequate method of contraception throughout treatment and for at least 4 weeks after study therapy is completed * Be advised of the importance of avoiding pregnancy during trial participation and the potential risks of an unintentional pregnancy. * All patients must sign study specific informed consent prior to study entry.