Core Endurance, Finger Grip Strength, Fatigue, and Hand Function in Patients With Rheumatoid Arthritis

* RA Group Inclusion Criteria: * Diagnosed with RA according to ACR/EULAR criteria * Between 18-65 years of age * Willing to participate in the study RA Group Exclusion Criteria: * Having any chronic disease other than RA * Having another musculoskeletal disease * Having adaptation problems and psychiatric illnesses that would impair participation in the study * Having hearing loss that would impair communication * Having severe vision loss * Having another rheumatic disease other than RA * Having any uncontrolled cardiopulmonary disease * Having a serious deformity or severe pain in the extremities or trunk that would prevent taking a crawling position (7 or higher on a 10-point numerical pain scale) (being present) * Hand deformity or pain severe enough to prevent finger grip strength measurements * History of any serious trauma or injury within the last 6 months * Changes in medication used for RA within the last 3 months * Receiving physiotherapy or other treatment other than medication * History of musculoskeletal surgery (trunk, extremities) * Being pregnant or breastfeeding Health Controls Inclusion Criteria: * Being between 18-65 years of age * Voluntary participation in the study Health Controls Exclusion Criteria: ● Having any diagnosed illness * Having a history of trauma