Core stabilization exercises developed by McGill have been shown to be one of the physiotherapy techniques aimed at reducing pain, increasing aerobic capacity, enhancing muscle strength, and thereby improving bone health in children with JIA. However, there is no study that has investigated core stabilization training for different types of JIA. In our study, we aim to compare the effectiveness of core stabilization training and a daily physical activity program in children with spondyloarthropathy, to help identify the most effective strategy for clinical practice. Additionally, highlighting the specific effects of core stabilization training on the treatment of juvenile spondyloarthropathy (pain, functional status, fatigue, and quality of life) will make a significant contribution to the literature. Taking into account the gaps in the literature, our study will investigate the effect of core stabilization training on pain, functional status, fatigue, and quality of life in patients with juvenile spondyloarthropathy.