An Observational Cohort Study to Assess the Postop Activity of Colorectal Patients Undergoing Elective Surgery (PHYSPAL)

All participants will have a physical activity monitor placed onto the right thigh in the midline which will start collecting data at midnight on the first postoperative day. This will continue until discharge or day 7, whichever is earlier. This is a non-invasive measure of activity and can discriminate between whether a patient is lying, sitting, standing or walking. There is no control group.