Studies including the use of any combination of accelerometers, pedometers or inertial measurement units for post-operative patient assessment.

Studies reporting sensor-based data for patients having undergone total or partial knee replacement at any time point post-operatively.

Studies including a minimum of n=5 knee arthroplasty patients.

Studies published in 2008 or later.

Conference abstracts.

Systematic reviews.

Studies that do not differentiate/stratify data results between knee arthroplasty patients and those having undergone other treatments.

Studies focusing on the use of accelerometers/IMUs for use in surgical navigation.

Studies using cadaveric, robotic or animal models.

Studies using sensors as part of an active feedback-assistive technology.

Published study protocols.

Validation studies with the primary aim of evaluating technology and limited clinical inquiry.