Inclusion Criteria:  Diagnosed with knee osteoarthritis and being on the waiting list to receive unilateral total knee arthroplasty Approved by the orthopedist for early physiotherapy treatment after total knee arthroplasty  Exclusion Criteria:  - Individuals undergoing revision total knee arthroplasty or undergoing bilateral total knee arthroplasty, Contralateral knee osteoarthritis (defined by activity greater than 4/10 pain) Having undergone any physical therapy intervention or other surgery in the last 6 months Any neurological, cardiac, pulmonary or psychiatric disease (eg, uncontrolled diabetes mellitus, neoplasms, uncontrolled blood pressure, neurological conditions) before or after surgery; Fracture, infection in the acute postoperative phase or presence of fever Cognitive impairments that alter the probability of correct understanding of the motor imagery program Body mass index > 35 kg / m2 Difficulties with understanding or communication Insufficient knowledge of Turkish to follow the study instructions.