## 4 Discussion  
The results of the study partially confirmed the initial hypothesis. Specifically, a positive correlation was observed between the asymmetry in the SLCMJ and the BAI Anterior Quadriceps (60\({}^{\circ}\)/s), as well as a negative correlation between the asymmetry in the SLCMJ and the BAI Posterior Hamstrings (60\({}^{\circ}\)/s). No correlations were observed with strength measurements at other angular velocities. Additionally, the regression analysis showed that the BAI Anterior Quadriceps (60\({}^{\circ}\)/s) was a significant positive predictor of the CMJ Bilateral Asymmetry Index, while the BAI Posterior Hamstrings (60\({}^{\circ}\)/s) demonstrated a significant negative relationship with the CMJ Bilateral Asymmetry Index. As mentioned earlier, asymmetry in isokinetic strength above 10% has been reported as a potential risk factor for injury [36; 37], although there are studies that set the risk threshold at 15% [5; 6]. Research interest has also focused on the effect of asymmetry on football players' performance in physical performance indicators [38; 39]. However, it seems that the results of these studies are not clear-cut, and the impact of asymmetry appears to depend on how it is assessed and the individual involved [40]. Therefore, it is evident that there is considerable room for further study on this topic. In the present study, the participants were adolescents, and it is well known that biological maturation can significantly affect performance in physical ability tests [41; 42]. The results of this study showed that approximately one-third of the participants were at a stage of normal maturation, while the remaining two-thirds were at a stage of early maturation. This observation is likely due to the fact that the participants are members of a professional football team academy. Often, biologically mature football players outperform their peers (normal maturation, delayed maturation) in physical abilities, which leads to them being selected by team scouts and coaches. This is likely why the majority of participants in this study were at an early maturation stage, and there were no participants in the late maturation stage. However, although the maturation stage of the participants \begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline
**Predictor** & **B** & **SE** & **95\% CI (B)** & **t** & \(p\) & \(\beta\) & **95\% CI (\(\beta\))** \\ \hline Intercept & 3.8571 & 0.7940 & 2.2665 & 5.4477 & 4.858 & \(<\)0.001 & — \\ BAI Anterior Quadriceps (60\({}^{\circ}\)/s) & 0.2083 & 0.0942 & 0.0196 & 0.3970 & 2.211 & 0.031 \({}^{\ast}\) & 0.2878 \\ BAI Anterior Quadriceps (180\({}^{\circ}\)/s) & \(-\)0.0479 & 0.0684 & \(-\)0.1850 & 0.0891 & \(-\)0.701 & 0.486 & \(-\)0.1258 \\ BAI Anterior Quadriceps (300\({}^{\circ}\)/s) & 0.0627 & 0.0835 & \(-\)0.1046 & 0.2300 & 0.750 & 0.456 & 0.0916 \\ BAI Posterior Hamstrings (60\({}^{\circ}\)/s) & \(-\)0.2029 & 0.0745 & \(-\)0.3523 & \(-\)0.0536 & \(-\)2.723 & 0.009 \({}^{\ast}\) & \(-\)0.3396 \\ BAI Posterior Hamstrings (180\({}^{\circ}\)/s) & 0.0499 & 0.0542 & \(-\)0.0587 & 0.1585 & 0.921 & 0.361 & 0.1552 \\ BAI Posterior Hamstrings (300\({}^{\circ}\)/s) & \(-\)0.0154 & 0.0620 & \(-\)0.1396 & 0.1088 & \(-\)0.248 & 0.805 & \(-\)0.0308 \\ \hline \hline \end{tabular} Note: F(6,56) = 2.42, \(p\) = 0.038, R\({}^{2}\) = 0.206 \({}^{\ast}\) Statistically significant predictors (\(\ast\) \(p\) < 0.05). CI = Confidence Interval. B represents unstandardized coefficients, SE is the standard error, \(\beta\) denotes standardized coefficients, and 95% confidence intervals (CI) are provided for both B and \(\beta\).  
\end{table} 
Table 4: Linear regression results for CMJ Bilateral Asymmetry Index. was assessed, the effect of maturation level on the asymmetry indices and performance of the participants was not examined. This fact is mentioned as a limitation of the study. Maximum strength is an important factor for jumping ability [43]. Specifically, a positive correlation between strength and jumping ability has been reported [44,45].