Inflammatory Arthritis and Tango

Selection and inclusion of patients will be done by principal investigator of Rheumatology Department. After verification of inclusion and non-inclusion criteria by principal investigator and signature of consent, patients will be randomized by 1: 1 randomization (centralized randomization by statistician into 2 groups at M0). They will participate in sessions in a deferred manner due to two per week for each group:

• Interventional "A" group: 48 sessions (on average 2/week) performed from M0 to M6 in 30 patients.
• Control "B" group: 24 sessions (on average 2/week) performed from M3 to M6 in 30 patients.

Patients of "B" group will be not performing sessions with "A" group patients. Sessions lasting about 60 minutes will be proposed from Monday to Friday in a room planned from this activity within the CHU. They will be adapted and personalized according to each one. Evaluations will be carried out for group 1 (interventional) before the first session of tango at M0, before the session at M3 and at the end of the protocol at M6. The same evaluations will be carried out for group B (control) at M0, before first session of tango at M3 and at the end of the protocol.

Assessment of pain and stress will be done before and after each session. Final assessment will be done at 6 months after randomization. Fitness assessment and tango sessions will be conducted by an argentine tango teacher

Inclusion criteria

• Patient age > 18 years old with RA (ACR/EULAR criteria) in remission (CDAI ≤2.8) or with low disease activity (CDAI ≤10), or with SA (ASAS criteria) with activity deemed stable by rheumatologist.
• Patient able to walk without help
• Patient able to complete a questionnaire
• Patient giving informed consent.
• Patient covered by social security

Exclusion criteria

• Patient with disorder of higher mental function or psychiatric disorders.
• Patient practicing argentine tango.
• Patient with an absolute contraindication to physical activity.
• Protected populations: pregnant women, breastfeeding women, tutorship, trusteeship, deprived of liberty, safeguard of justice.