The aim of the study is to investigate the effect of home-based exercise program versus personalized IVR exergame (Fit-XR) program on physical fitness, functional capacity and physical activity in adolescents with Juvenile idiopathic arthritis. Patients followed up by four tertiary pediatric rheumatology centers will be included in the project. Two different exercise programs will be applied to the patients by experienced physiotherapists. Fit-XR program will be 25-30 minutes a day and will be applied 2 days a week for 8 weeks under the supervision of a physiotherapist in the clinic. The total points obtained by the participants during the FiT-XR games will be recorded after each training session. In the second group, a personalized multicomponent (balance, strength, agility, endurance) home- based exercise program will be applied according to the physical fitness level of the children.