Inclusion Criteria:  Patients who are referred by the Orthopaedic surgeon and are diagnosed with Knee Osteoarthritis, and consented to unilateral total knee replacement. Able to ambulate with or without walking aid. Ability to provide informed consent.  Exclusion Criteria:  Patients who have severe bilateral Knee Osteoarthritis, affecting their ability to walk and only one will be operated on. Patients with pre-existing cognitive issues, such as dementia. Patients planning for another surgery within 6 months after their TKR. Patients with existing co-morbidities that limit their walking ability, such as severe respiratory distress syndromes.