Outcome measurements: Control variables such as the age, sex, height, weight, body mass index, Borg scale physical activity and distress respiratory test will be measured at the beginning of the treatment. Dependent variables such as the pain intensity, the pressure pain threshold, the contractility, the stiffness, the adverse effects, the Oswestry and Schöber test, as well as the ultrasound imaging cross sectional area and thickness of the skin, subcutaneous tissue, connective tissue, L4 multifidus and the abdominal Wall (rectus anterior, externus oblique, internal oblique and transversus abdominis) will be assessed before and after each intervention by a blinded examiner.