This research project aims to generate scientific evidence on the clinical results obtained in the treatment of fibromyalgia, which usually presents with pain and long-term disability, by applying a special form of manual physiotherapy called "POLD concept". This therapy is based on a passive, oscillatory mobilization, performed at a resonance frequency and applied throughout the time of the therapeutic session, on the vertebrae and the muscles of the back, without interruption. It is carried out on the initiative of the research team in "pain treatment", of the physiotherapy school of the University of Lleida, in collaboration with the Omphis Foundation and the clinical service of the Unity of Fibromyalgia of GSS (Hospital Universitarios de Santa María, Lleida)
