This arm consists core stabilization exercises including abdominal hallowing, supine bride, bride dog, side plank, curl-up and modified push up exercise. Each session is going to begin with warm-up training which consist of stretching exercise for upper-limb, lower-limb and trunk muscles, and complete with cool down exercise (same with warm-up training). Patients are going to attend one session of patient education before the first session.

This arm consists balance training exercises which performed on computerized wobble board for primarily lower limb and anti- gravity muscle. Each session is going to begin with warm-up training which consist of stretching exercise for upper-limb, lower-limb and trunk muscles, and complete with cool down exercise (same with warm-up training). Patients are going to attend one session of patient education before the first session.

This arm was planned as a control group. Therefore, any intervention will not be performed. Patients in this arm going to participate only one session of patient education at the beginning of the program

Exercises training of this group occurs from 3 stages. In the stage 1 covering the first two weeks, core stabilization exercises are going to be applied 3 sets of 10 repetitions except side plank. Side plank is going to be performed 3 sets of 10 seconds. Stage 2 is going to include from 3 to 5 weeks. In this stage, exercises are going to be performed 3 sets of 12 repetitions except bride dog, plank and side plank. These exercises are going to be applied 3 sets of 15 seconds. Patients are going to perform exercises of stage 3 from 6 to 8 weeks. Exercises of stage 3 are going to be practiced 3 sets of 15 repetitions except bride dog, side plank and plank exercises which are going to be applied 3 set of 20 second. All stages include the same exercises except modified push-up exercise includes instead of plank exercise in stage 1. All of the exercises are going to practiced 3 days a week for 8 weeks. One of the sessions is estimated to take approximately 45-60 minutes.

Functional balance is going to evaluate with "berg balance scale". The scale consists of 14 items including sitting, standing up and standing up on one foot positions.Each item is scored between "0(unable)" to "4(independent) " according to success of participant. Total score is obtained by summing the scores of all items. Maximum score is 56. Scores of 0 to 20 represent balance impairment, 21 to 40 represent acceptable balance, and 41 to 56 represent good balance

Postural swing will have been assessed using with computerized wobble board. The participant's swings on the device are measured in the antreroposterior and mediolateral directions. Measurements are performed by the device including accelerometer which has 10 degrees of tilt angle.

Six minute walk test( 6MWT) will be applied. The test evaluates six minute walking distance in meters accordance with ATS/ ERS statements.

"OctoCore application" is going to be used for core stabilization assessment. The application consists of two phase. The first phase is performed with single left deadline test and bird- dog exercise test is applied in second phase. Measurement of the acceleration during tests will be performed by using smart phone which has "OctoCore application" putting on mid-line of participant's fourth lumbar vertebra.