Evaluation of a New Screening Method for Sarcopenia in Rheumatoid Arthritis

"Conducting a day hospitalization including analyses:~1. Quantitative muscular analysis by measuring the DEXA of the whole body, the reference method for measuring body compartments and allowing the diagnosis of sarcopenia (IMMA\<7 in men and 5.5 in women)~2. Qualitative muscular analysis:~ * isokinetic measurement of muscular strength carried out on 3 muscle groups using a manual measurement sensor such as Microfet2 ® : quadriceps, triceps brachii, biceps~ * measurement of grip strength using Jamar® equipment validated as recommended by the EWGSOP~ * a walking test to assess the functional impact of sarcopenia and its severity"