## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Variable**} & \multirow{2}{*}{**Sex**} & \multicolumn{2}{c}{**Position**} & \multirow{2}{*}{\(p\)**-Value Sex**} & \multirow{2}{*}{\(p\)**-Value**} & \multirow{2}{*}{\(p\)**-Value**} \\ \cline{3-3} \cline{5-6}  & & **Backs (n: 46)** & & & & \\ \hline \multirow{2}{*}{\% Body fat} & Male & 14.9 \(\pm\) 4.1 *\({}^{\lambda}\) & 17.8 \(\pm\) 6.8 *\({}^{\lambda\lambda}\) & 0.001 & 0.009 & 0.518 \\ \cline{2-6}  & Female & 18.7 \(\pm\) 1.9 *\({}^{\lambda\lambda}\) & 23.5 \(\pm\) 4.8 *\({}^{\lambda\lambda}\) & & & \\ \hline \multirow{2}{*}{\% Body fat BIA} & Male & 16.4 \(\pm\) 7.4 \({}^{\lambda}\) & 21.0 \(\pm\) 7.7 \({}^{\lambda}\) & & & \\ \cline{2-6}  & Female & 18.4 \(\pm\) 7.5 \({}^{\lambda}\) & 25.2 \(\pm\) 12.2 \({}^{\lambda}\) & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Fat mass \\ anthropometry (Kg) \\ \end{tabular} } & Male & 12.4 \(\pm\) 3.8 \({}^{\lambda}\) & 18.0 \(\pm\) 7.5 \({}^{\lambda}\) & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Fat mass BIA(Kg) \\ \end{tabular} } & Female & 11.4 \(\pm\) 2.1 \({}^{\lambda}\) & 16.2 \(\pm\) 6.1 \({}^{\lambda}\) & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Fat mass BIA(Kg) \\ \end{tabular} } & Male & 12.4 \(\pm\) 5.7 \({}^{\lambda}\) & 21.1 \(\pm\) 8.7 \({}^{\lambda}\) & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Muscle mass \\ anthropometry (Kg) \\ \end{tabular} } & Female & 12.6 \(\pm\) 3.1 \({}^{\lambda}\) & 20.6 \(\pm\) 9.0 \({}^{\lambda}\) & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Muscle mass \\ \end{tabular} } & Male & 37.6 \(\pm\) 3.4 *\({}^{\lambda\lambda}\) & 42.4 \(\pm\) 4.5 *\({}^{\lambda\lambda}\) & \multirow{2}{*}{\(<\)0.001} & \multirow{2}{*}{\(<\)0.001} & \multirow{2}{*}{0.219} \\ \cline{2-3} \cline{5-6}  & Female & 27.1 \(\pm\) 2.5 *\({}^{\lambda\lambda}\) & 29.8 \(\pm\) 3.7 *\({}^{\lambda\lambda}\) & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Muscle mass \\ BIA(Kg) \\ \end{tabular} } & Male & 39.5 \(\pm\) 4.5 *\({}^{\lambda\lambda}\) & 44.5 \(\pm\) 4.2 *\({}^{\lambda\lambda}\) & \multirow{2}{*}{\(<\)0.001 in forwards \(<\)0.001 in Male} & \multirow{2}{*}{0.030} \\ \cline{2-3} \cline{5-6}  & Female & 26.6 \(\pm\) 1.5 * & 28.5 \(\pm\) 4.4 * & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} \% Body lean mass \\ anthropometry \\ \end{tabular} } & Male & 45.8 \(\pm\) 3.2 & 41.6 \(\pm\) 9.4 & & & \\ \cline{2-3} \cline{5-6}  & Female & 44.4 \(\pm\) 1.2 & 41.8 \(\pm\) 3.9 & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} \% Body lean mass \\ BIA \\ \end{tabular} } & Male & 48.1 \(\pm\) 4.5 * & 45.4 \(\pm\) 4.4 * & & & \\ \cline{2-3} \cline{5-6}  & Female & 39.7 \(\pm\) 14.1 * & 34.8 \(\pm\) 14.2 * & & & \\ \hline \multirow{2}{*}{\begin{tabular}{c} Body lean mass \\ anthropometry (Kg) \\ \end{tabular} } & Male & 69.6 \(\pm\) 5.7 *\({}^{\lambda\lambda}\) & 79.8 \(\pm\) 7.2 *\({}^{\lambda\lambda}\) & & & \\ \cline{2-3} \cline{5-6}  & Female & 49.4 \(\pm\) 3.7 *\({}^{\lambda\lambda}\) & 54.3 \(\pm\) 7.1 *\({}^{\lambda\lambda}\) & & & \\ \hline \multirow{2}{*}{\
\begin{tabular}{c} Body lean mass \\ BIA(Kg) \\ \end{tabular} } & Male & 57.0 \(\pm\) 26.0 *\({}^{\lambda\lambda}\) & 73.1 \(\pm\) 19.8 *\({}^{\lambda\lambda}\) & & & \\ \hline \multirow{2}{*}{
\begin{tabular}{c} Data presented as M \(\pm\) SD * Statistically significant differences (\(p\) < 0.05) according to sex for the same position; \({}^{\lambda}\) Statistically significant differences (\(p\) < 0.05) according to position within the same sex.  
\end{table} 
Table 2: Body composition in rugby players of both sexes according to position. significant differences in forwards (\(p\) = 0.044). In addition, females presented a thicker front thigh skinfold (26.1 \(\pm\) 1.6 vs. 18.0 \(\pm\) 1.4 mm, \(p\) < 0.001) and medial calf skinfold (16.0 \(\pm\) 1.1 vs. 10.6 \(\pm\) 1.0 mm, \(p\) = 0.001), with differences in backs for this skinfold (\(p\) < 0.001). As regards the sum of six skinfolds, no differences were observed by sex (\(p\) = 0.605).