Focal Extracorporeal Shock Wave Therapy With Two Different Dosing Regimens for Chronic Low Back Pain

The purpose of this clinical trial is to evaluate and compare the efficacy of two different dosing regimens of focal extracorporeal shock wave therapy (F-ESWT) in patients diagnosed with chronic mechanical low back pain. Participants will be randomly assigned to one of two experimental groups to receive different parameters of shock wave intervention. The main objective is to determine which dosing scheme provides a more significant reduction in pain intensity and a better recovery of lumbar function.