A forward walking program will be applied on the treadmill. To be done 3 times a week / 8 weeks. Before the walking exercises, 5 minutes of warm-up and 5 minutes of cool-down exercises will be performed. While walking on the treadmill, the participant can hold onto the railings. Each participant will start at the speed they choose and gradually increase their perceived exertion rate to 11-13 on the Borg scale, and it is planned to walk for 10 minutes in the first week and gradually for 20-30 minutes in the following weeks.

Traditional physiotherapy is a treatment method that includes exercise training, hotpack, ultrasound and TENS (electrotherapy) applications.

To be done 3 times a week / 8 weeks. 20 min hotpack + 7 min ultrasound + 20 min TENS and knee osteoarthritis exercises (hip knee flexion extension, knee extension while sitting on a chair, quadriceps isometric exercise in the supine position, straight leg raise exercises) are planned to be applied in the clinic with the physiotherapist. The exercises are planned to be started with 5 repetitions in the first week and the intensity of the exercise is planned to be increased with 10 repetitions, 15 repetitions and 20 repetitions depending on the patient's tolerance.

6 minute walk test A test that evaluates functional capacity in individuals. The test is performed in a closed and uncrowded space. The distance between the starting and finishing points in a closed space should be 30 meters on a flat surface. The distance an individual can walk in this area in 6 minutes is evaluated in meters. Before the test begins, the patient is rested and information about the test is given to the patient. The patient is asked to walk between the starting and finishing points at their own walking pace. The test is monitored with a stopwatch. The purpose of the test is to measure the maximum distance they can walk during this time

Timed up and go test This test measures the dynamic balance and functional mobility. It is a test that measures the time in seconds for the individual to stand up from a standard chair (seat height of approximately 44 cm, arm height 65 cm), walk a distance of 3 meters, turn around and sit on the chair.

Functional Reach Test A test developed to examine forward stability. During the test, participants' ability to reach forward while standing with their feet fixed is recorded as a distance and their balance performance is evaluated.

Knee flexion and extension will be measured with a universal goniometer.

Isometric muscle strength will be assessed with a hand-held dynamometer.

It is planned to be measured with a universal goniometer. The pivot point of the goniometer is placed at the center of the patella, the fixed arm pointing to the tibia tuberosity and the movable arm pointing to the SIAS, and the angle between the line drawn from the SIAS to the middle of the patella and the two lines drawn from the middle of the patella to the tibia tuberosity is recorded.

Tampa Kinesiophobia Scale It was developed to evaluate the kinesiophobia of individuals. The scale consists of 17 questions. When calculating the scale score, the scores of some questions are reversed and calculated. A high total score indicates that the individual has high kinesiophobia.

EUROQL 5d 5l The scale consists of two parts: the EQ-5D descriptive system and the EQ-VAS (visual analog scale).

Gaı̇t Analyzer application A smartphone-based application called "Gait Analyzer" will be used. It collects kinematic data of gait using smartphone technology and phone sensors. With this application, kinematic data of walking such as walking speed, cadence, step duration, step length, step length symmetry and step duration symmetry can be obtained. The smartphone is fixed to the region corresponding to the L3 proccesus spinosus of the patient with a suitable waist belt with velcro bandage. The patients are then asked to walk a distance of 20 meters at their natural gait and speed without walking aids and measurements are performed.