Patient-navigation-based Preoperative Rehabilitation Exercise Program in Patients Undergoing TKA

Inclusion Criteria: * Patients diagnosed with knee osteoarthritis (KOA) scheduled to undergo primary unilateral total knee arthroplasty (TKA) * Assessed by the attending physician as medically fit to tolerate preoperative rehabilitation exercise, possessing effective communication skills, and capable of cooperating with all required examinations and assessments * Assessed as capable (either the patient or their caregiver) of using a smartphone to receive information Exclusion Criteria: * Individuals unable to cooperate due to impaired consciousness, cognitive impairment, or similar conditions * Concurrent severe comorbidities such as liver cirrhosis, respiratory failure, renal failure, malignant tumors, trauma, etc. * History of significant neuromuscular disorders or other joint diseases deemed by the attending physician to affect joint function * a time interval of greater than 7 days or less than 3 days between the admission day date and the scheduled surgery date; * Currently undergoing systematic lower limb functional exercise training within the past four weeks