## 3 Results  
The Shapiro-Wilk test confirmed the normality of the collected data from the three fundamental basketball skills (\(p\) > 0.10). Tables 2 and 3 present the results of the defensive slide. The study has shown that, generally, the equal increment in the shoe outside friction coefficient did not result in equal changes in the selected parameters of motor skill control, indicating a non-linear relationship between the performance quality of essential basketball skills and the shoe friction coefficient. Notably, the contact time exhibited a significant decrease (\(p\) < 0.05) as the shoe outside friction coefficient increased, indicating faster movement. Concerning medio-lateral impulse, a significant increase (\(p\) < 0.05) was observed as the friction coefficient increased from 0.8 to 1.0; however, no further significant change was noted when the coefficient increased from 1.0 to 1.2. A similar trend was observed in lateral stride length, mirroring the results of medio-lateral impulse. Regarding ankle torque, an increase in the shoe outside friction coefficient corresponded to a decrease in torque, suggesting a safer movement pattern. Notably, the change was statistically significant (\(p\) < 0.01) only between the friction coefficients of 1.0 and 1.2. \begin{table}
\begin{tabular}{c c c c c} \hline
**Shoe** & **Contact Time (ms)** & **ML Impulse (BWs)** & **Lateral Stride Length (m)** & **Ankle Torque (Nm/kg)** \\ \hline S1 & 0.55 \(\pm\) 0.17 & 109.43 \(\pm\) 15.69 & 0.80 \(\pm\) 0.15 & 2.19 \(\pm\) 0.37 \\ S2 & 0.51 \(\pm\) 0.15 & 130.71 \(\pm\) 15.50 & 0.94 \(\pm\) 0.18 & 2.03 \(\pm\) 0.31 \\ S3 & 0.48 \(\pm\) 0.12 & 131.48 \(\pm\) 13.93 & 1.00 \(\pm\) 0.19 & 1.45 \(\pm\) 0.21 \\ \hline \end{tabular}  
* S1: Shoe outside with a friction coefficient of 0.80 \(\pm\) 0.05. S2: shoe outside with a friction coefficient of 1.00 \(\pm\) 0.05. S3: Shoe outside with a friction coefficient of 1.20 \(\pm\) 0.05. ML: medio-lateral direction. BW: body weight.  
\end{table} 
Table 2: Mean and standard deviation (mean \(\pm\) SD) of the selected parameters associated with the defensive slide. \begin{table}
\begin{tabular}{c c c c} \hline
**Contact Time (ms)** & **ML Impulse (BWs)** & **Lateral Stride Length (m)** & **Ankle Torque (Nm/kg)** \\ \hline S1–S2 & 0.02 * & 0.04 * & 0.03 * \\ S1–S3 & 0.00 ** & 0.03 * & 0.00 ** \\ S2–S3 & 0.04 * & & 0.00 ** \\ \hline \end{tabular}  
* S1: Shoe outside with a friction coefficient of 0.80 \(\pm\) 0.05. S2: Shoe outside with a friction coefficient of 1.00 \(\pm\) 0.05. S3: Shoe outside with a friction coefficient of 1.20 \(\pm\) 0.05. ML: medio–lateral direction. BW: body weight.  
\end{table} 
Table 3: Significance identified by \(p\)-value obtained from ANOVA test associated with the defensive slide (*: significant, \(p\)\(\leq\) 0.05; **: highly significant, \(p\)\(\leq\) 0.01). The results for crossover diribbling are presented in Tables 4 and 5, revealing intriguing insights into the relationship between the shoe outsole friction coefficient and control parameters associated with this skill. Similar to the defensive slide, the linear change in the shoe outsole friction coefficient demonstrated non-linear effects on the selected parameters of the skill control. The temporal duration of skill execution, as indicated by contact time, demonstrated minimal responsiveness to variations in the coefficient. Concerning the anterior-posterior impulse, which is responsible for deceleration in forward motion, a notable and statistically significant increase (\(p<0.05\))--implying a quicker cessation of motion--was observed as the friction coefficient increased from 0.8 to 1.0. However, there was no subsequent significant alteration with a further increase from 1.0 to 1.2. Conversely, the media-lateral impulse, related to sudden direction change or cutting movement, showed no significant change (\(p>0.05\)) as the coefficient increased from 0.8 to 1.0, but a significant increase was noted with a further coefficient increase from 1.0 to 1.2.