Conventional physiotherapy was applied 5 days/ week, 30 min session, in total 18 days.

Exercise program:

• 1-2 week: 20 min. of active exercise in lying position (e.g.: hip flexion, extension, abduction) with the goal to improve hip range of motions, strengthen muscles. Various equipment was used (slippery base, elastic bands, foam roller, gymnastic ball etc.). + gait training exercise within the bars (10 min);
• 3 week: 20 min. of active exercise in lying position + stationary bicycle / treadmill (10 min).

Task oriented exercise program was applied 5 days/ week, 30 min session, in total 18 days.

Exercise program included:

• 1 week: active exercise in lying position (15 min) + task-oriented exercise (15 min);
• 2 week: active exercise in lying position (10 min) + task-oriented exercise (20 min);
• 3 week: stationary bicycle / treadmill (10 min) + task-oriented exercise (20 min).

Task oriented exercise included:

• walking backwards, sideways, high kneels (on the instable bases);
• walking with alternate speed (physiotherapist give the instruction when to walk faster / slower);
• Sit and stand from the chair (standing up to reach for the ball held by the physiotherapist);
• step onto the step (after stepping to reach the ball held by the physiotherapist);
• walk with the obstacles (obstacle course);
• Catch and throw the ball while standing on an unstable base.

Task-oriented exercise program for patients after total hip replacement.

was evaluated using the Visual Analogue Pain Scale (VAS). Participants were asked to report "current" pain intensity. A higher score indicates greater pain intensity: no pain (0-4 mm), mild pain (5-44 mm), moderate pain (45-74 mm), and severe pain (75- 100 mm).

Using goniometer the range of hip motions were evaluated: flexion, extension, abduction. Each motion was measured three times and averaged value was used.

The muscle strength of hip flexion, extension, and abduction was evaluated using manual muscle testing technique (Oxford 5 point scale).

To evaluate the function of leg after hip replacement surgery the modified Harris Hip Score (mHHS) was used. MHHS is reliable and valid tool to evaluate leg function after hip replacement and to monitor the leg function during recovery. The questionnaire was completed by a physiotherapist together with the patient. This questionnaire consists of 8 questions / topics, where each answer has a score:

• Pain description (maximum 44 points);
• Limping (max 11 points);
• Assistive devices (max 11 points);
• Walking distance (max 11 points);
• Stair climbing (max 4 points);
• Putting on shoes/socks (max 4 points);
• Sitting (max 5 points);
• Using public transport (1 point). The higher the score, the better the leg function. The maximum number of points is 91.

Dynamic Balance was assessed using the Berg Balance Scale (BBS). This scale is used to assess the subjects' imbalance in 14 different tasks, where each task is scored on a scale from 0 (does not perform at all) to 4 (performs excellent). The higher the score, the better the balance, with a maximum score of 56.