The aim of work was to determine the level of strength-speed preparation of footballers at the beginning and at the end of preparatory period, on the base of vertical jump performance. Trials were recorded with piezoelectric force platform KISTLER 9182C. No significant differences in values of jump height as well as of average and maximal power were found. It could indicate lack of significant effect of exercises, applied in training of footballers with high sport level, on the level of force-velocity preparations.
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