In addition to the program given to the control group, the dual task program will be given to the study group progressively as previously stated (Silsupadol et al., 2006). These applications will be explained to the patients or their relatives face-to-face in the clinical environment after the initial evaluation and then sent and followed up by telerehabilitation method and patients will always have access to programs and education. In addition, both groups will be told that they can contact the researcher upon request.

The control group will receive the usual post-operative care of stretching lower extremity strengthening balance exercises activities of daily living recommendations.

The control group will receive the usual post-operative care of stretching lower extremity strengthening balance exercises and activities of daily living recommendations. In addition to the program given to the control group, the dual task program will be given progressively to the study group.

On a 10 cm straight line or numeric scale, the patient is asked to mark the pain they feel (0: no pain, 10: excruciating pain).

The scale is a 9-item measure developed to assess total knee arthroplasty patients' satisfaction, expectations, physical activities, and clinical and functional status in the preoperative and postoperative period, reported by both the physician and the patient.

The mini mental test is categorized under five main headings: orientation (10 points), recording memory (3 points), attention and calculation (5 points), recall (3 points) and language (9 points). The scale is scored out of a total of 30 points and has two different variants for educated and uneducated people. Traditionally, scores between 24 and 30 are considered normal. A score below 24 indicates cognitive impairment. 18-23 is considered as mild dementia, 12-17 as moderate dementia and below 12 as severe dementia.

The questionnaire consists of 10 items and each question is rated out of 5 points (ranging from 0 "never" to 4 "very often" or N/A "not applicable"). The score obtained is the average score per question (i.e. total score/10 for the questionnaire).

Patients are first asked to stand up from a sitting position, walk 3 m at their normal speed, turn around, walk back to the chair and sit down. Walking aids are allowed. Patients are asked to perform this test while performing a cognitive dual task (subtract 2 continuously starting from 100).