BASIS AND JUSTIFICATION OF THE RESEARCH: : In Parkinson's patients, difficulty in walking, slowing down in movements, difficulties in starting and maintaining walking become evident in Hoehn Yahr stage 2-3-4 stages of the disease. In addition to drug therapy, physical therapy and rehabilitation applications have proven to be effective in conditions such as walking and movement restriction in Parkinson's patients. Rehabilitation with a physiotherapist, controlled home exercise programs, and robot-assisted rehabilitation practices were all found to be effective in the clinic.~EXPECTED BENEFITS AFTER THE RESEARCH: It improves the patient's daily life activities and tests of all kinds of FTR applications. With the rehabilitation the investigators will implement, the investigators will help patients to be able to walk, sit and stand up unaided and independently. The investigators expect an increase in exercise capacity, an increase in walking distance, an improvement in balance and walking, and an increase in balance and walking measurements.~RESEARCH METHOD:~All measurements 1st day when rehabilitation applications started and 50th day when rehabilitation applications end.~To evaluate whether they benefit from the applied rehabilitation; Changes in the patient's own values will be compared on the first day and the last day of rehabilitation.~It will be determined whether there is a difference between the scales and values between the two groups in which classical rehabilitation and C mill virtual reality applied rehabilitation.~In order to determine the neurological examination status of the patients:~UPDR s-III: Unified Parkinson's Disease Rating Scale-Motor: maximum 56 points and a high score is considered bad.~Regarding balance and walking: Tinetti test: the maximum possible score is 28, a high score is considered good.~To measure the time it takes to get up and walk 3 meters from the seat, turn and sit in the chair that he/she started again: The time up and go test: normal value: It was determined as less than 12 seconds.~To determine their own thoughts about the quality of life and the health of the patient: Short Form Health Survey-36: Norm values for the Turkish society have been determined, and the values received by the patients will be interpreted accordingly.~To determine the ability to walk: Functional Ambulation Classification (FAC): A value between 0 and 5. A high score is determined as good.~Walking parameters:Measurements will be made with a C mill walking and balance rehabilitation device.~It is known that walking speed, walking distance, walking time, step length, and number of steps per minute decrease in Parkinson's patients. In order to measure whether there is an increase or change in these values with rehabilitation: Measurements will be made with a C mill walking and balance rehabilitation device. The following measurements will be made by walking at the speed at which the patient can walk comfortably, for a maximum of 5 minutes: Single stance phase (%), Single stance time (s), weight transfer %, right and left stride length (cm), two stride length (cm), symmetry ( %), walking distance (m), walking time (minute), walking speed (km/h), total number of steps and number of steps per minute.
In this research; the investigators would like to compare the results of patients with Parkinson's disease in the two groups who received classical physical therapy and rehabilitation program and virtual reality assisted walking and balance exercise at the beginning (1st rehabilitation day =1. day) and end of rehabilitation (21st rehabilitation day=50.day). In addition, the investigators aimed to reveal the change of gait and balance parameters by measuring the C-mill walking and balance rehabilitation device with numerical data and graphic analysis.