## 3 Results
### Basic Statistic
Table 5 shows the results of the stepwise backward regression analysis of the set of kinematic parameters in the UHCJ20m test and the results in the MRLS20m test. A kinematic parameter showing a negative correlation between SN in the UHCJ20m test and the final result in the MRLS20m test is highlighted. The correlation coefficient is R = 0.383, and the coefficient of determination is R\({}^{2}\) = 0.147 at the significance level of \(p\) < 0.001, which means that the subjects with a lower number of steps/jumps had a better result in the start acceleration run. Table 6 shows the results of the stepwise regression analysis of the set of kinematic parameters of the UHCJ20m test without average speed and the result in the MRFS20m test. The results show the exclusion of the kinematic variables from the previous set, which are statistically significant. Their coefficient of multiple correlation with the criterion variable was R = 0.486, while the coefficient of determination was R\({}^{2}\) = 0.236. The correlation SL variable's coefficient of correlation Part. r = \(-\)0.469, whereas the CT variable had a somewhat lower coefficient of correlation Part. r = 0.425 with the result of the UHCJ20m test at a statistically significant difference at \(p\) < 0.001. The results imply that subjects who had a shorter ground contact time and a longer jump had better results in the maximum running speed assessment test. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**M100m** & **R = 0.371** & **R\({}^{2}\) = 0.138** & **F(4,113) = 4.507** & \(p\) < 0.002** & **SEE 0.507** \\ \hline
**UHCJ20m** & **b \({}^{*}\)** & **Part. r** & **b** & **Rsquare** & **t (114)** & \(p\)** \\ \hline SN & 0.129 & 0.104 & 0.079 & 0.435 & 1.109 & 0.270 \\ CT & 0.260 & 0.189 & 0.006 & 0.529 & 2.043 & 0.043 \({}^{*}\) \\ SL & \(-\)0.516 & \(-\)0.245 & \(-\)1.001 & 0.793 & \(-\)2.689 & 0.008 \({}^{*}\) \\ FT & 0.284 & 0.163 & 0.004 & 0.708 & 1.758 & 0.081 \\ \hline \hline \end{tabular} Legend: UHCJ20m—unilateral horizontal cyclic jumps 20 m, M100m—100 m run, R—coefficient of correlations, R\({}^{2}\)—coefficient of determination, F—f test value, SEE—standard error of the estimate, \(t\)—value, b \({}^{*}\)—regression coefficient, Part. r—partial correlation coefficient, b—non-standardized regression coefficient, t—\(t\) value, SN—average number of steps, CT—average contact time, SL—average step length, FT—average flight time, \({}^{*}\) significant at \(p\) \(\leq\) 0.05.  
\end{table} 
Table 4: Results of stepwise forward regression analysis of the set of kinematic parameters of the UHCJ20m test and results in the M100m test. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**MRLS20m** & **R = 0.383** & **R\({}^{2}\) = 0.147** & **F(4.116) = 19.96** & \(p\) < 0.001** & **SEE 0.114** \\ \hline
**UHCJ20m** & **b \({}^{*}\)** & **Part. r** & **b** & **Rsquare** & **t (114)** & \(p\)** \\ \hline SN & 0.383 & 0.383 & 0.054 & \(-\)0.000 & 4.468 & 0.000 \({}^{*}\) \\ \hline Legend: UHCJ20m—unilateral horizontal cyclic jumps 20 m, MRLS20m—20 m sprint start run, R—coefficient of correlations, R\({}^{2}\)—coefficient of determination, F—f test value, SEE—standard error of the estimate, b \({}^{*}\)—regression coefficient, Part. r—partial correlation coefficient, b—non-standardized regression coefficient, t—value, SN—average number of steps, \({}^{*}\) significant at \(p\)\(\leq\) 0.05.