Patients performed Jacobson relaxation technique in supine position. Respiration control and various visual imaging techniques were used during the technique. Relaxation exercises were made within the supervision of a physiotherapist. The application period was 20 minutes for one session, 3 days a week and totally six weeks.

Patients exercised with proprioceptive neuromuscular facilitation technique for trunk muscles using chopping and lifting patterns with ritmic initiation PNF exercises were made by the physiotherapist. The application period was 20 minutes for one session, 3 days a week and totally six weeks.

Patients had core stabilization exercises that involved spinal mobility. The patients performed the drawing-in maneuver within various visual imaging techniques during all exercises, especially with respiratory control. Exercises were made within the supervision of a physiotherapist. The application period was 20 minutes for one session, 3 days a week and totally six weeks.

Patients in the control group were told the importance of a single session exercise

A hot pack and conventional transcutaneous electrical stimulation (TENS) will be applied with a Chattanoga Intelect® stimulator for 20 minutes at a frequency of 100 Hz and a transition time of 60 μs. The duration of application was 3 days per week and six weeks for each of the four groups. These practices were also applied to individuals in all four groups.

Pain intensity was measured with visual analog scale (VAS). For VAS, it is desirable that patients express their pain with a (X) mark on a scale of 100 mm. According to this, "0" means that the patients have no pain and "100" means that they have worst pain. The distance between the marking point and the start of the line is measured in millimeters and the numerical value found determines the pain intensity of patients. The total pain intensity is measured with the scale of Likert type of 6 points. In this scale "0" indicates no pain and "5" indicates worst pain.

The Oswestry Low Back Pain Questionnaire was used to assess the functioning of daily living activities in low back pain. There are 10 questions in the questionnaire, 6 options in each question, ranging from 0 to 5 points. The patient is asked to choose the expression that best describes the situation. The highest score was 50, with mild functional impairment between 1-10 points, moderate functional impairment between 11-30 points, and severe functional impairment between 31-50 points. The Turkish version of the questionnaire was validated and reliable.

Individuals' kinesiophobia were assessed by using the Tampa Kinesiophobia Scale. The questionnaire is a 17-item measure designed to measure fear of movement / re-injury. The scale includes injury / re-injury and fear-avoidance parameters in work-related activities. A 4-point Likert Scale (1 = strongly disagree, 4 = fully agree) is used on the scale. A total score is calculated after the reversal of 4, 8, 12, and 16 questions. The patient has a total score between 17-68. The high score on the scale indicates that the kinesophobia is also high. The Turkish version of the questionnaire was validated and reliable

Core stability was assessed with the pressure device (Stabilizer Pressure Biofeedback, USA, Chattanooga Group, Hixson, TN). For transversus abdominus (TrA) and multifidus (MF) muscle strength the patients performed the drawing-in maneuver in a supine position, with their knees flexed at 90°. To perform abdominal drawing-in maneuver, all the subjects were instructed to slowly draw in their lower abdomen as if they were holding their urine and then draw up their pelvic floor muscle so that it could contract, together with their lower abdomen, while continuing normal breathing. The end part of the pressure device was placed on the posterior superior iliac spine. The pressure gauge was set to indicate 40 mmHg before the drawing-in maneuver began. The subjects were told to increase the pressure by 10 mmHg using the drawing-in maneuver on the verbal instruction, "start", and to maintain the state for 5 seconds. Pressure changes were recorded as mmHg.

Patient satisfaction was measured with VAS for pain and functionality. The patients asked to express their satisfaction with a (X) mark on a scale of 10 cm. According to this, "0" means that the patients have worst satisfaction and "100" means that they greatest satisfaction. The distance between the marking point and the start of the line is measured and numerical value taken as a satisfaction level of patients.