Patients in the IASTM group were asked to lie face down on a stretcher, exposing the entire lumbar region. IASTM was applied to all paraspinal muscles for a total of 5 minutes after massage cream was applied. Immediately afterwards, the same application was performed for the right and left hamstring muscles from the gluteal line to the bottom of the popliteal fossa for 3 minutes after massage cream was applied. IASTM application was performed vertically, horizontally and diagonally using instruments of different sizes and shapes at an angle of 45 degrees to the skin surface.

KT application (Kinesio Tape® Tex Gold) was performed using the "muscle technique". In lumbar region application, while the patient was standing, the tape was cut as a Y-strip with a base of 5 cm.

IASTM application .

Straight leg raise (SLR) was used to determine hamstring shortness. For SLR application, while the patient was lying on the back, the leg was lifted by the researcher to the level where the pain began, and the flexion angle in the hip was recorded

The sit and reach test (SRT) to measure the flexibility.During SRT application, the distance between the middle fingers of the hands and the feet was recorded while the patient was in the long sitting position in the bed and reached the toes with their hands without bending the knees

Modified Schober Test and finger-ground distance evaluation for the spinal mobility assessment. For the Modified Schober Test, after marking 5 cm below and 10 cm above the spinous process of the lumbar vertebra while the patient was standing, the patient was asked to bend forward without bending the knees, and the change in the same range was recorded

While measuring "finger-ground distance", the patient was asked to touch the ground with both hands while standing with the knees in extension. The distance between the fingertip and the ground was recorded

In this study, Siemens Acuson S 3000 device and Siemens HD 10 MHz linear probe were used for subcutaneous and perimuscular zone measurements.2 cm lateral to the midpoint of the L2-3 interspinous ligament is the area where the fascia planes are most parallel to the skin. In this study, the probe was centered at this point, which was determined while the patient was lying face down on the stretcher, and measurements were made from the right and left. For the measurement location in the hamstring region, the point where the fascia planes were most parallel to the skin was determined, as in the lumbar region. Measurement was performed in the area where the zones were most clearly seen lateral to the popliteal fossa.