Fibromyalgia affects 2 to 5% of adults in the general population. Patients describe a combination of symptoms centred around fatigue not induced by exercise and not relieved by rest. The diagnosis of fibromyalgia is self-perpetuating by the deconditioning, consequence of a reduced muscle mass due to inactivity and periods of prolonged rest. Thus, it seems fundamental to develop other non-drug approaches: among them, adapted physical activity is recommended by most learned societies because of a good level of evidence (Level 1, Grade A). The question remains, however, whether simple advice to resume physical activity is sufficient (routine care with medical assessment at 3 months) or whether a physical activity supervised inside and outside the hospital is not more relevant.