## 3 Results
\begin{table}
\begin{tabular}{l l l l l l l l l l l l} \hline \hline
**Unit** & **Variable Right** & **XA** & **SD** & **K-S** & **Cr. \(\alpha\)** & **Variable Left** & **XA** & **SD** & **K-S** & **Cr. \(\alpha\)** & **t** & **_p_ \\ \hline s & DCD\_RL\_U19 & 8.25 & 0.37 & & & DCD\_LL\_U19 & 8.13 & 0.62 & & & 2.12 & 0.063 \\ km/h & BFS\_FSR\_all & 61.16 & 10.96 & - & 0.97 & BFS\_FSL\_all & 57.71 & 10.18 & - & 0.92 & 5.72 & **<0.001** \\ km/h & BFS\_FSR\_U12 & 46.53 & 5.56 & & & BFS\_FSL\_U12 & 44 & 5.5 & & & 1.93 & 0.072 \\ km/h & BFS\_FSR\_U13 & 51.33 & 3.88 & & & BFS\_FSL\_U13 & 50.39 & 3.76 & & & 0.83 & 0.42 \\ km/h & BFS\_FSR\_U14 & 57.8 & 6.6 & & & BFS\_FSL\_U14 & 54.73 & 6.63 & & & 1.58 & 0.137 \\ km/h & BFS\_FSR\_U15 & 61.9 & 4.59 & & & BFS\_FSL\_U15 & 56.75 & 7.45 & & & 2.1 & 0.053 \\ km/h & BFS\_FSR\_U16 & 68.5 & 7.86 & & & BFS\_FSL\_U16 & 64.22 & 7.13 & & & 1.96 & 0.066 \\ km/h & BFS\_FSR\_U17 & 70.38 & 4.79 & & & BFS\_FSL\_U17 & 65.46 & 4.93 & & & 3.62 & **0.004** \\ km/h & BFS\_FSR\_U18 & 72.5 & 4.81 & & & BFS\_FSL\_U18 & 66.9 & 5.02 & & & 5.78 & **<0.001** \\ km/h & BFS\_FSR\_U19 & 73.44 & 6.39 & & & BFS\_FSL\_U19 & 70.44 & 5.08 & & & 2.75 & **0.025** \\ km/h & BFS\_FRR\_all & 83.36 & 13.22 & - & 0.96 & & BFS\_FRL\_all & 76.82 & 13.95 & - & 0.93 & 7.42 & **<0.001** \\ km/h & BFS\_FRR\_U12 & 66.06 & 7.94 & & & BFS\_FRL\_U12 & 56.82 & 11.28 & & & 3.99 & **0.001** \\ km/h & BFS\_FRR\_U13 & 72.89 & 6.31 & & & BFS\_FRL\_U13 & 67.94 & 7.28 & & & 2.13 & **0.048** \\ km/h & BFS\_FRR\_U14 & 79.2 & 7.4 & & & BFS\_FRL\_U14 & 72.33 & 8.19 & & & 2.67 & **0.018** \\ km/h & BFS\_FRR\_U15 & 80.75 & 6.97 & & & BFS\_FRL\_U15 & 76.63 & 10.37 & & & 1.28 & 0.219 \\ km/h & BFS\_FRR\_U16 & 92.06 & 7.7 & & & BFS\_FRL\_U16 & 85.94 & 5.57 & & & 2.56 & **0.02** \\ km/h & BFS\_FRR\_U17 & 96.7 & 8.07 & & & BFS\_FRL\_U17 & 88.92 & 6.91 & & & 4.24 & **0.001** \\ km/h & BFS\_FRR\_U18 & 96.7 & 4.08 & & & BFS\_FRL\_U18 & 88.7 & 6.18 & & & 3.87 & **0.004** \\ km/h & BFS\_FRR\_U19 & 97 & 6.96 & & & BFS\_FRL\_U19 & 91.22 & 5.72 & & & 2.37 & **0.045** \\ W/kg & RMP\_R\_all & 22.07 & 3.96 & + & & & RMP\_L\_all & 22.35 & 3.99 & + & & \(-\)2.43 & **0.017** \\ W/kg & RMP\_R\_U12 & 18.45 & 2.84 & & & RMP\_L\_U12 & 18.48 & 3.24 & & & \(-\)0.1 & 0.921 \\ W/kg & RMP\_R\_U13 & 20.04 & 3.13 & & & RMP\_L\_U13 & 20.27 & 3.02 & & & \(-\)0.88 & 0.39 \\ W/kg & RMP\_R\_U14 & 22.13 & 5.02 & & & RMP\_L\_U14 & 22.57 & 4.92 & & & \(-\)1.3 & 0.216 \\ W/kg & RMP\_R\_U15 & 21.64 & 3.27 & & & RMP\_L\_U15 & 22.3 & 2.83 & & & \(-\)1.65 & 0.119 \\ W/kg & RMP\_R\_U16 & 23.83 & 2.69 & & & RMP\_L\_U16 & 23.86 & 2.66 & & & \(-\)0.08 & 0.94 \\ W/kg & RMP\_R\_U17 & 23.14 & 4 & & RMP\_L\_U17 & 23.57 & 3.99 & & & \(-\)2.13 & 0.055 \\ W/kg & RMP\_R\_U18 & 24.01 & 2.39 & & & RMP\_L\_U18 & 24.39 & 2.67 & & & \(-\)1.25 & 0.242 \\ W/kg & RMP\_R\_U19 & 26.41 & 2.47 & & & RMP\_L\_U19 & 26.52 & 3.13 & & \(-\)0.27 & 0.797 \\ \hline \end{tabular} Note: X\(\alpha\)—average, SD—standard deviation, K-S per Kolmogorov-Smirnov test, Cr. \(\alpha\)—[PERSON]’s alpha coefficient, +: normal distribution, \(\div\): no normal distribution, \(t\)—t value, \(p\)—statistical significance of \(t\)-test (two-sided \(p\leq 0.05\)), No—number, all—whole sample, U12—group under 12 years old, \(\dots\): U19—group under 12 years old, \(R\)—right leg touches of the ball, \(L\)—left leg touches of the ball, DCD\_RL—dribbling the ball with a change in direction with the right leg on the right obstacle course, DCD\_RL—dribbling the ball with a change in direction with the right leg on the left obstacle course, DCD\_LL—dribbling the ball with a change in direction with the left leg on the left obstacle course, BFS\_FSR—ball flight speed when kicking the ball from the standing position with the right leg, BFS\_FSR—ball flight speed when kicking the ball from the run-up with the right leg, BFS\_FRL—ball flight speed when kicking the ball from the run-up with the right leg, BMP\_R—CMJ relative maximum power for the right leg, RMP\_L—CMJ relative maximum power for the left leg.  
\end{table}