## 3 Results
\begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Sequences Number (\%)**} & \multicolumn{6}{c}{**Maximal Length of Sequences (\%)**} \\ \hline  & & **1500-m** & **800-m** & & & **1500-m** & **800-m** & & \\ \hline
**Subjects** & **n** & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **SE** & \(p\) & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **SE** & \(p\) \\ \hline All Athletes & 96 & \(31.3\pm 11.0\) & \(34.6\pm 12.8\) & 0.3 & 0.00 \({}^{*}\) & \(32.6\pm 9.5\) & \(37.6\pm 9.9\) & 0.5 & 0.01 \({}^{*}\) \\ \hline Males & 48 & \(33.1\pm 0.2\) & \(37.2\pm 13.4\) & 0.3 & 0.00 \({}^{*}\) & \(28.5\pm 11.5\) & \(35.7\pm 10.0\) & 0.7 & 0.09 \\ \hline Females & 48 & \(29.4\pm 10.5\) & \(32.0\pm 12.0\) & 0.2 & 0.00 \({}^{*}\) & \(36.7\pm 7.3\) & \(39.6\pm 9.7\) & 0.3 & 0.07 \\ \hline Elite & 64 & \(31.7\pm 10.8\) & \(34.0\pm 13.1\) & 0.2 & 0.00 \({}^{*}\) & \(32.3\pm 9.4\) & \(37.3\pm 10.8\) & 0.5 & 0.32 \\ \hline Junior & 32 & \(30.4\pm 11.7\) & \(35.9\pm 12.6\) & 0.4 & 0.00 \({}^{*}\) & \(33.1\pm 10.1\) & \(38.3\pm 8.2\) & 0.5 & 0.00 \({}^{*}\) \\ \hline Medallists & 32 & \(31.7\pm 8.9\) & \(37.9\pm 13.6\) & 0.5 & 0.00 \({}^{*}\) & \(31.3\pm 8.7\) & \(35.2\pm 10.2\) & 0.4 & 0.04 \({}^{*}\) \\ \hline Non-medal. & 64 & \(31.0\pm 33.0\) & \(33.0\pm 12.3\) & 0.2 & 0.00 \({}^{*}\) & \(33.2\pm 10.0\) & \(38.9\pm 9.8\) & 0.6 & 0.12 \\ \hline
100–105\% & 48 & \(32.4\pm 33.2\) & \(33.2\pm 13.0\) & 0.1 & 0.00 \({}^{*}\) & \(30.6\pm 9.0\) & \(38.1\pm 9.8\) & 0.7 & 0.20 \\ \hline
105–112\% & 48 & \(29.8\pm 12.8\) & \(35.8\pm 12.8\) & 0.5 & 0.00 \({}^{*}\) & \(34.8\pm 9.8\) & \(37.3\pm 10.2\) & 0.2 & 0.04 \({}^{*}\) \\ \hline \hline \end{tabular} \(p\): differences between 1500 and 800 m freestyle results; \({}^{*}\): \(p\) < 0.05.  
\end{table} 
Table 2: Splits sequences. \begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Time Series 1—Half 2—Random 3**} & \multicolumn{6}{c}{**CV%**} \\ \hline  & & **1500-m** & **800-m** & & **1500-m** & **800-m** & & \\ \hline
**Subjects** & **n** & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **SE** & \(p\) & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **SE** & \(p\) \\ \hline All Athletes & 96 & 1.0 \(\pm\) 0.1 & 1.3 \(\pm\) 0.7 & 0.5 & 0.01 \({}^{*}\) & 2.9 \(\pm\) 0.5 & 2.9 \(\pm\) 0.6 & 0.1 & 0.60 \\ \hline Males & 48 & 1.0 \(\pm\) 2.2 & 1.4 \(\pm\) 0.8 & 0.6 & 0.04 \({}^{*}\) & 2.9 \(\pm\) 0.5 & 2.9 \(\pm\) 0.6 & 0.0 & 0.94 \\ \hline Females & 48 & 1.0 \(\pm\) 0.0 & 1.2 \(\pm\) 0.6 & 0.4 & 0.15 & 2.8 \(\pm\) 0.5 & 2.9 \(\pm\) 0.6 & 0.3 & 0.56 \\ \hline Elite & 64 & 1.0 \(\pm\) 0.2 & 1.4 \(\pm\) 0.8 & 0.6 & 0.02\({}^{*}\) & 2.8 \(\pm\) 0.5 & 2.8 \(\pm\) 0.5 & 0.0 & 0.98 \\ \hline Junior & 32 & 1.0 \(\pm\) 0.0 & 1.1 \(\pm\) 0.5 & 0.4 & 0.78 & 2.9 \(\pm\) 0.6 & 3.1 \(\pm\) 0.6 & 0.3 & 0.40 \\ \hline Medallists & 32 & 1.0 \(\pm\) 0.0 & 1.5 \(\pm\) 0.9 & 0.7 & 0.24 & 2.8 \(\pm\) 0.4 & 2.8 \(\pm\) 0.5 & 0.0 & 0.96 \\ \hline Non-medallists & 64 & 1.0 \(\pm\) 0.2 & 1.2 \(\pm\) 0.5 & 0.4 & 0.16 & 2.9 \(\pm\) 0.6 & 3.0 \(\pm\) 0.6 & 0.2 & 0.55 \\ \hline
100–105\% of WR & 48 & 1.0 \(\pm\) 0.2 & 1.3 \(\pm\) 0.7 & 0.5 & 0.20 & 2.9 \(\pm\) 0.4 & 2.9 \(\pm\) 0.4 & 0.1 & 0.91 \\ \hline
105–112\% of WR & 48 & 1.0 \(\pm\) 0.0 & 1.3 \(\pm\) 0.7 & 0.6 & 0.77 & 2.8 \(\pm\) 0.6 & 3.0 \(\pm\) 0.7 & 0.2 & 0.47 \\ \hline \hline \end{tabular} \(p\): differences between 1500 and 800 m freestyle results; \({}^{*}\): \(p\) < 0.05.  
\end{table} 
Table 3: Variability of splits times along races. splits. The 800 m were competed at a velocity notably below the mean from the 5 th to the 14 th split. Figure 2a,b represent how the male swimmers' normalised velocity was significantly lower in the 2 nd and 3 rd (\(p\) = 0.00 and \(p\) = 0.04, respectively) and higher from the 6 th to the 12 th split (\(p\) = 0.00) in the 1500 m than in the 800 m competitions. Females' normalised velocity resulted significantly higher in the 1500 m than in the 800 m competitions from the 4 th to the 11 th split (\(p\) = 0.00).