Association Between Health Care Provider (HCP)-Assessed ECOG Performance Status (PS) and Overall Survival, and Objectively Measure of Physical Activity (PA) Levels in Advance-cancer Patients"

This study examines whether a doctor's assessment of a cancer patient's physical function (called ECOG performance status) matches what can be objectively measured by activity monitors, and whether physical activity levels predict survival in patients with advanced cancer. **You may be eligible if...** - You have been diagnosed with colorectal cancer (any stage, including recurrent) and have good daily functioning (ECOG 0-2) - You have head and neck cancer scheduled for radiation treatment - You have any cancer history (other than non-melanoma skin cancer) and are a current or recent smoker - You are scheduled for pancreatic surgery - You have a metastatic or locally advanced solid tumor and are 18 or older (ECOG 0-3) - You can speak, read, and write English and live in or near Houston, TX (for most arms) **You may NOT be eligible if...** - You had major surgery in the past 8 weeks - You have unmonitored high blood pressure - You have significant cognitive impairment - You have an orthopedic or neurological disability affecting your ability to stand or exercise - You have poorly controlled pain (7/10 or higher) - You have a pacemaker or are pregnant (for the pancreatic surgery sub-study) Talk to your doctor to see if this trial is right for you.