Analysis of the Impact of Functional Training on Explosive Strength in Young Athletes Using the Optojump System

The purpose of this study was to investigate the effects of an eight-week functional training program on the development of explosive strength in adolescent basketball players. A total of 32 athletes (15 girls and 17 boys, aged 14–17 years) participated in the study. The evaluation was carried out using the Optojump system, applying three standardized tests: Countermovement Jump (CMJ), Repeated Jumps (RJ5), and Squat Jump (SJ). Athletes were tested before and after the intervention, and statistical analysis was performed using SPSS v26. Results indicated significant improvements in all tests for both sexes (p < 0.001), with mean increases between 1.8 and 2.7 cm. Effect sizes were large (Cohen’s d > 1.0), and confidence intervals confirmed the robustness of the findings. The results demonstrate that functional training is an effective and safe method for optimizing explosive strength and vertical jump in adolescent basketball players, supporting its integration into long-term athletic development programs.