Validation of Two Acitivity Monitors in Three Inpatient Populations.

The aim of this study is to investigate the validity of Sens Motion and ActivPAL acitivity monitors. Thirthy-six patients from three different patient populations will be included: 12 acute high-risk abdominal surgery patients (+18 years), 12 hip fracture patients (+65) and 12 older medical patients (+65). Each patient will be asked to wear two sets of activity monitors while performing a predefined researcher-supervised protocol consisting of a range of positions and activities including lying down, sitting, standing and walking. Observations measured by time in each position will be used as a golden standard for physical activity and thus compared with the data produced by the acitivity monitors.