The basic principle in the treatment of rheumatoid arthritis is to prolong the period of remission in patients. Even if complete remission is not achieved, improvements in symptoms and clinical findings enable patients to maintain their functional capacity at a certain level, which is important for their quality of life. To this end, a multidisciplinary approach involving exercise therapy, pharmacological treatment, and psychological support is applied. The primary goal of pharmacological treatment is to intervene in inflammatory pathways. While there are studies in the literature on the relationship of these pharmacological agents with other disease-related mediators and the clinical course of the disease, no studies have been found that examine the relationship between aerobic capacity, which is one of the basic indicators of the patient's functional level, and fatigue, cardiorespiratory risk factors, and quality of life, which are related to aerobic capacity. Based on the results of the study, the aim was to compare the effects of anti-TNF-α and non-TNF-α drugs on aerobic capacity, fatigue, muscle strength, cardiovascular disease risk factors, and disease activity in RA patients.