Evaluation of Functional Improvement After Spa Therapy in Fontcaude Center

Inclusion criteria: * Patient aged 40 to 75 years with radiologic and gonarthrosis radiologic et painful gonarthrosis, unilateral ou bilateral, whatever is the radiographic stage * Patient presenting a EVA ≥3 with a corresponding radiology at least of 1year * Patient affiliated with a social security system Exclusion criteria: * Realization of a water cure in the last 6 months * Infiltration of the knee of less than 3 months * Impossibility to sign the informed consent or which for reasons geographical, social or psychological could not be regularly followed, * Person major placed under guardianship or trusteeship, * Private person of freedom by court or administrative order, nobody being the object of a legal protective measure, * Patient already included in an interventional clinical protocol, * Pregnant women * Contraindication in the water cure: * Severe change of the general state or debilitating afflictions * Acute affections and pushed acute(sharp) of the chronic affections * Grave cardiac insufficiency, unstable arterial high blood pressure * Severe renal or hepatic insufficiency * Not healed cutaneous hurts * Contagious or evolutionary diseases * Evolutionary Cancers * Current immunomodulator or immunosupressor Treatment, waves of inflammation.