The control group will receive core stabilisation exercises 3 days a week for 8 weeks. Core exercise programme was applied to the patients three days a week for 8 weeks. The programme consisted of two weekly parts, and each part was planned according to the weeks by ordering from easy to difficult. Prior to the core stabilisation exercise programme, low intensity 5-10 min warm-up 30 min core exercises consisting of 3 levels were performed. Exercises progressed from easy to difficult according to the condition of the patients.

Core stabilisation exercises applied to the control group were applied to the aerobic exercise group. After the core stabilisation exercises, aerobic exercise was performed with a stationary bicycle at a speed of 50 rpm for approximately 40 minutes.

Patients in the core stabilisation exercise group underwent a total of 24 sessions of core stabilisation exercise programme 3 days a week (with at least 1 day of rest between each session) for a total of 8 weeks. Each exercise session was performed under the supervision of a physician in the Department of Physical Medicine and Rehabilitation, Istanbul University, Istanbul Faculty of Medicine. Each session was arranged as 35-minute programmes with an average of 8-10 patients, 5 minutes of which was warm-up. Before starting the exercise, patients were taught to reduce lumbar lordosis by contracting and drawing in the abdominal muscles and to find a lumbar and pelvic neutral position by moving the pelvis forwards and backwards. In each session, the neutral position was found first and attention was paid to maintain the neutral position throughout the exercise. The exercises consisted of 3 levels. The exercise level was completed gradually

Visual Analogue Scale (VAS) was used to determine the presence and severity of low back pain in the study participants. GAS is a practical test with high validity and reliability in pain assessment. GAS is an assessment method numbered from 0 to 10, where '0' indicates no pain and '10' indicates the presence of the most severe pain. Participants were asked to mark the degree of pain they had on this scale and recorded.

Functional status was assessed using the Oswestry Disability Index (ODI). The OSI is a widely used questionnaire for the assessment of functional status in patients with low back pain. It includes subjective assessment. There are items including activities of daily living such as pain intensity, self-care, lifting, walking, sitting, standing, sleeping, social life and travelling information. The items are scored between 0-5. The final score is calculated by taking the patient's score as a percentage of the maximum score. Higher scores indicate an increasing level of disability. Turkish validity and reliability was performed by Yakut et al. in 1998.

Biodex balance system (Biodex Medical System Inc., NY, USA, Model SW45-30D-E6N, SD 950-304) was used for fall risk assessment. This device creates stability indices by evaluating movements in the overall, anterior-posterior and right-left (medial-lateral) directions. Its validity and reliability have been established in this field. It has static and dynamic modes and 12 mobility levels of the platform (mobility level of the floor). In the limit of stability test, there are 9 balls, 1 in the middle and 8 on the edges, and when these balls light up, the person should move the centre of gravity to the burning ball and keep it there for 0.25 seconds. Each ball flashes once during the test and after the ball on the edge lights up, the ball in the centre lights up again. The aim is to move the centre of gravity in the specified direction. The test was performed three times and the extinguishing time of all balls was recorded by the device.

The 6-minute walk test is used as a simple measure of aerobic exercise capacity. During this test, you walk at a normal pace for six minutes on a 30-metre long hard surface track, marking the track every 3 metres and placing a cone at the end of the 30-metre track and walking back around it. This test can be used to monitor your response to treatments for heart, lung and other health problems.