This article covers the process of developing strength qualities in 14-15-year-old judokas, its scientific foundations, and practical methods. The influence of physiological changes in adolescence on sports training, methods of strength development used in training, and their effectiveness were scientifically analyzed. The results of experiments on the influence of a set of special exercises, plummetric exercises, paired judo exercises, and strength exercises performed in one's own weight are presented. According to the research results, the age of 14-15 is the most optimal period for the formation of strength qualities in judokas, and correctly chosen training technologies lead to a stable increase in sports results.