This study looks at how different pain-control methods affect how quickly older adults get out of bed and start moving again after major surgery. Researchers will observe patients aged 65 and older who are admitted to the intensive care unit (ICU) after major surgery. Doctors will use their usual pain-control methods - either medication given through a vein, an epidural, or a nerve block - based on standard clinical practice; the study team will not change or choose the treatment. The study will record how long it takes for each patient to first sit up, stand, or walk after surgery, along with pain levels, confusion (delirium), how satisfied patients are with their pain control, and how long they stay in the ICU. The goal is to better understand which pain-control approaches may help older patients recover and move more quickly and safely after major surgery.