In recent years, in many countries of the world, attention to the Russian national sport-sambo (self-defense without weapons) has increased. Two major versions, developed by the International and European Federations, are officially recognized in the world: sports sambo and combat sambo. The paper considers the methodology of the approach to improving the system of end-to-end training and selection in sambo. The experience of implementing this approach, obtained at the Sambo School of the Republic of Karelia, is considered. Thanks to this sambo training, many children and adolescents are enrolled in schools in the region. Highly qualified athletes (World, Europe, Russia champions) are trained at the supporting university of the Republic of Karelia-Petrozavodsk State University, youth are being prepared for military service, sambo elements are used in physical training of employees of various power structures.