Patients that meet inclusion criteria will have a wristwatch size, lightweight ActiGraph GT3X+ placed at each of three body sites, the dominant-side wrist, right hip and dominant-side ankle to objectively measure physical activity. Patients will wear the ActiGraph devices during two 30-minute periods of direct observation. To compare activity counts measured by the ActiGraph devices with directly observed purposeful physical activity, we will record the time and type of physical activity performed by patients such as sitting at the edge of the bed, sitting in a bedside chair, transferring to a chair, standing and ambulating. The data acquired from this observational (AMERCIA) study will seek to establish the feasibility of using accelerometers to measure activity in a diverse population of patients with medical or surgical critical illness.
