## 3 Results  
In anthropometric characteristics, correlations were observed between height and body mass with VO\({}_{\rm 2 max}\) measured in the laboratory. Specifically, a negative moderate correlation was observed with height (r = \(-\)0.455, \(p\) = 0.017), and a negative moderate correlation was also observed with weight (r = \(-\)0.395, \(p\) = 0.042). Significant correlations are presented in Figure 1, while Table 1 displays the statistical indices of all correlations. Among the variables of the two aerobic tests, a significant positive correlation was observed between \(\rm vVO_{2 max}\) and the distance covered in YYIR1 (r = 0.393, \(p\) = 0.042), as well as between \(\rm VO_{2 max}\) estimated from performance in YYIR1 (r = 0.393, \(p\) = 0.042). Significant correlations are presented in Figure 1, while Table 1 displays the statistical indices of all correlations. YYDistance refers to performance on Yo-Yo intermittent recovery test; \(\rm YYVO_{2 max}\), \(\rm VO_{2 max}\) predicted from the performance on Yo-Yo intermittent recovery test level 1; \(\rm LVVO_{2 max}\), \(\rm VO_{2 max}\) measured in the laboratory test; and \(\rm LvVO_{2 max}\) velocity measured during the laboratory test. The level of significance set at \(p\) < 0.05. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Variable** & **YYDistance** & \(\rm YYVO_{2 max}\) & \(\rm LVO_{2 max}\) & \(\rm LvVO_{2 max}\) \\ \hline Height & r = 0.062 & r = 0.062 & r = \(-\)0.455 & r = \(-\)0.024 \\  & \(p\) = 0.758 & \(p\) = 0.758 & \(p\) = 0.017 * & \(p\) = 0.906 \\ Weight & r = \(-\)0.183 & r = \(-\)0.183 & r = \(-\)0.395 & r = 0.065 \\  & \(p\) = 0.360 & \(p\) = 0.360 & \(p\) = 0.042 * & \(p\) = 0.747 \\ BMI & r = \(-\)0.291 & r = \(-\)0.291 & r = \(-\)0.059 & r = 0.104 \\  & \(p\) = 0.140 & \(p\) = 0.140 & \(p\) = 0.770 & \(p\) = 0.604 \\ \% BF & r = \(-\)0.344 & r = \(-\)0.344 & r = \(-\)0.123 & r = \(-\)0.245 \\  & \(p\) = 0.079 & \(p\) = 0.079 & \(p\) = 0.542 & \(p\) = 0.217 \\ \(\rm LVO_{2 max}\) & r = 0.183 & r = 0.183 & & \\ \(\rm LvVO_{2 max}\) & \(p\) = 0.360 & \(p\) = 0.360 & & \\ \(\rm LvVO_{2 max}\) & r = 0.393 & r = 0.393 & & \\  & \(p\) = 0.042 * & \(p\) = 0.042 * & & \\ \hline \hline \end{tabular} BMI, body mass index; % BF, percentage of body fat; YYDistance, performance on Yo-Yo intermittent recovery test; \(\rm YYVO_{2 max}\), \(\rm VO_{2 max}\) predicted from the performance on Yo-Yo intermittent recovery test level 1; \(\rm LVO_{2 max}\), \(\rm VO_{2 max}\) measured in the laboratory test; \(\rm LvVO_{2 max}\), velocity measured during the laboratory test. * denotes significant correlation at \(p\) < 0.05.  
\end{table} 
Table 1: Correlation matrix for anthropometric characteristic and aerobic performance indexes. Figure 1: Significant correlations between variables. (**A**) Correlation between Height and \(\rm LVO_{2 max}\). (**B**) Correlation between Weight and \(\rm LVO_{2 max}\). (**C**) Correlation between \(\rm LvVO_{2 max}\) and \(\rm YYDistance\). (**D**) Correlation between \(\rm LvVO_{2 max}\) and \(\rm YYVO_{2 max}\). From the results of the one-way ANOVA analysis, no differences were observed between playing positions in any anthropometric characteristics or variables of the two aerobic tests (laboratory and field). The means of anthropometric characteristics in relation to position are presented in Figure 2, while the means in the variables of the aerobic tests are presented in Figure 3. The statistical indices for anthropometric characteristics and aerobic tests are presented in Table 2.