## 4 Discussion  
The presented study analyses how a 10-year implementation of one-side weight sports affects the CoP and whether these changes cause negative changes in athletes' lower limb or posture. A long-term sports activity with specific movement patterns can significantly affect the static load on the feet and impact the overall body posture [17; 18]. For this reason, we decided to investigate the differences between two homogeneous groups of football and handball athletes. We did not find any significant differences between the groups of athletes in the physical constitution of the body, the area of the foot and the distribution of foot pressure loads. Differences were observed in the load parameters of the front-reflection part and the rear-access part of the foot, within the individual monitored groups. Other authors also reached similar conclusions regarding partial loading of the foot [19; 20]. Most sports are based on preferring the loading of the front part of the foot-standby mode, to the rear part-stabilization mode. Our results indicate a higher load on the forefoot of both limbs (left/right) in football players. Handball players showed a higher load on the rear part of the feet. These differences are probably related to the nature of the sport and the subsequent impact on changes in body posture, in the sense of shifting the center of gravity. According to [PERSON] et al. [21], football players who play in defensive positions, with frequent contact with the opponent, those who run at full speed with changes in \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \(\lambda\) & F & df & 1 F1 & \(p\)-Value \\ \hline Knees & 0.80 & 4.71 & 37 & 3.25 & 0.015 \\ Heels & 0.71 & 7.41 & 37 & 3.25 & 0.002 \\ \hline \hline \end{tabular} Legend: Lambda (\(\lambda\)) = result value of [PERSON] test; F = the resulting F value of the MANOVA test; 1 F1 = critical value of test criterion F; df = degree of freedom of the test \(p\)-value = result \(p\)-value.  
\end{table} 
Table 7: MANOVA test. direction and those who perform sharp accelerations in their position on the field, are particularly prone to musculoskeletal injuries. Deviation in the maximum and average pressure points from the norm (0 \(\pm\) 0.5 cm) is considered a sign of imbalance. In our study, we identified an average deviation in the antero-posterior direction of 85.50 \(\pm\) 25.98 in football players and of 100.95 \(\pm\) 33.45 in handball players. A more pronounced, statistically significant (\(p\) = 0.003) deviation was noted in the latero-lateral direction (F: 118.05 \(\pm\) 22.38; H: 141.85 \(\pm\) 25.67). The results of our measurements are consistent with results with other published studies dealing with this issue [22; 23; 24]. Active football players have a significantly greater load on the lateral side of the foot and foreleg on both dominant and non-dominant limbs and in dynamic and static tests. These results are also consistent with those presented by [PERSON] [22], who studied football players and reported genuarum, lateral foot placement and significant forefoot loading in the subjects. [PERSON] et al. [23], in their study, demonstrated the relationship between specific football shoes and loads in specific parts of the foot. Statistically significant results were obtained in the parameter for the lateral load of the feet on the dominant and non-dominant limbs. A study by [PERSON] et al. [24] drew attention to the characteristic distribution of the pressure zones of the feet depending on the specific movement performed by the football player. When receiving the ball, the middle of the foot bears more load. During a kick, the load shifts to the side of the foot, while sprinting places greater load on the forefoot. According to [PERSON] [25], due to better developed muscles and strengthening of the arch of the feet during training, football players are characterized by a more even distribution of the load on the lower limbs.