In the period of ten weeks junior basketball players divided into two experimental and control groups, were subjected to various training programs. Patients in experimental group, in addition to regular basketball training, additional trained plyometric model of training twice a week, while respondents in the control group had only a technical-tactical basketball training. The aim of this study was to test the impact of content plyometric training on explosive leg strength exstensors in performing various jumps in junior basketball players. Tested were two jumps: Counter movement jump and Squat jump, and observed the following variables: maximum jump height (h), maximum force in concentric contraction (Fmax) and time implementation maximum force in concentric contraction (tmax). Comparing the results obtained on the basis of initial and final measurements unambiguously proved that the tested variables are changed under the influence of experimental factors. In two tested jump significantly improve the maximum jump height (p=.00) and maximum force (p=.00). Time implementation maximum force is not changed significantly during the ten weeks treatment. Research has proven that plyometric training methods affect the development of explosive strength of legs extensors of basketball junior players.
