Volleyball is dynamic collective sport in which, if you want to achieve top results, you need to work correctly from the youngest age, and we will deal with that topic in this paper. For success in volleyball conditioning preparation plays a big role, which starts from the earliest days when young athletes start playing volleyball. As these are small people, i.e. children and adolescents who are still developing, conditioning practice should be adapted to their specific needs and should not disrupt their natural growth and development. When working with young people focus should be on multi-faceted development at the very beginning, and as they grow up and with the mastery of basic motor skills, they are more concerned with the specific needs of the sport itself. Trainers must be familiar with all aspects of growth and development, not only physical but also psychological and mental, and how to adapt training to the specific needs of athletes based on this knowledge. Each athlete should be approached individually because not everyone has the same opportunities and needs. It is important that coaches are educated and use that knowledge in their work and monitor the children and their progress. Communication between coaches and children is also of great importance for children to develop successfully and to love physical activity in general. Properly constructed, programmed and planned conditioning training is of great importance for success in this sport and for building future successful athletes and mentally strong people.