Aerobic Exercise Program Followed by Cold Water Immersion: Effects on Arthritis Patients Arterial Stiffness

Inclusion Criteria: * Patient (male or female) between the ages of 20 and 80, diagnosed with rheumatoid arthritis without any other risk factor in relation to RA, and having a DAS-28 score between 2.6 and 6. * Signature of informed consent * Affiliation to a French social security scheme or beneficiary of such a scheme. Exclusion Criteria: * Unstabilized corticosteroids and / or\> 10 mg prednisone / day; * Unstabilized hypertension; * Pregnant women; * Alteration of higher functions making comprehension and adherence to a conditioning program impossible (mini mental test \<24); Patient who has performed intense physical exercise / physiotherapy within the previous 24 hours the interventions planned in this project; * Contraindication to immersion in cold water (a dermatological factor and / or vascular or respiratory cardiac dysfunction and / or cold intolerance syndrome and / or syndrome such as Raynaud's Syndrome); * Inability to perform physical exercise, regardless of its origin (neurological, central or peripheral, cardiovascular or respiratory or musculoskeletal); * Legal incapacity or limited legal capacity; * Subject unlikely to cooperate with the study and / or weak cooperation anticipated by the investigator; * Subject without health insurance; * Subject being in the exclusion period of another study or provided for by the "National Volunteer File".