Back pain is a leading cause of disability, including impairment in activities of daily living. In particular, the persistence of low back pain is more frequent in the elderly, associated with functional limitations and difficulties to perform tasks in everyday life. In addition to pharmacological treatments, various non-surgical interventional procedures are used for the treatment of low back pain. Some recent studies have evaluated the interventional oxygen-ozone (O2-O3) therapy in the treatment of back pain. However, these results are based on the technique of intradiscal infiltration / intraforaminal of O2-O3, while the intramuscular injection technique / paravertebral is the most widely used in clinical practice in Italy. In general, minimally invasive treatments such as percutaneous infiltration, are well tolerated and have been shown to produce clinical results, although the number of controlled studies is still scarce and the studies are often not comparable. Taking into account the above considerations, it seems appropriate to try to broaden the knowledge on the use of O2-O3 in the treatment of low back pain, using the technique of intramuscular injection / paravertebral, with particular reference to the elderly population.