Inclusion Criteria:  total cemented knee arthroplasty with posterior stability (PS -cruciate sacrificing, posterior stabilized), informed consent to participate in the study, full medical record, patients' regular control visits, knee degenerative disorder stage II and III according to Altman classification, ability to understand and independently perform the complete physiotherapeutic programme  Exclusion Criteria:  partial arthroplasty, deformation aetiology other knee degenerative disorder, cognitive disorders resulting in inability to fill out the study questionnaire, - degenerative disorders of multiple joints, poor general health that prevented the patient from understanding or performing the full physiotherapeutic programme, intraoperative and postoperative complications preventing the patient from understanding or performing the full physiotherapeutic programme, lack of informed consent to participate in the study.