60 healthy male volunteers, between the ages of 18 and 55 years, with no history of low back pain, were randomly assigned into 1 of 2 groups to determine the effect lumbopelvic belts had on the thickness of lateral abdominal and lumbar multifidus (LM) muscles- two muscle groups that are closely related to spine stability. Patients received 8 weeks of intervention with a lumbopelvic belt, or no intervention at all. The results of the study demonstrated that thickness of the lateral abdominal muscles and the cross-sectional area (CSA) of the lumbar multifidus (LM) muscles (both sides) decreased significantly among patients in the belt group at 8 week follow up.