## 3 Results
### Assessment of the Regional RV Changes Using 3D Parcellation
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Variable**} & \multicolumn{2}{c}{**All Athletes**} & \multicolumn{2}{c}{**Non-Linemen**} & \multicolumn{2}{c}{**Linemen**} \\ \cline{2-7}  & \multicolumn{2}{c}{**(_n = 59_)**} & \multicolumn{2}{c}{**(_n = 39_)**} & \multicolumn{2}{c}{**(_n = 20_, 15 for 3D Data)**} \\ \cline{2-7}  & **Pre-T** & **Post-T** & **Pre-T** & **Post-T** & **Pre-T** & **Post-T** \\ \hline \multicolumn{7}{c}{**RV Dimensions**} \\ \hline
3D-RV EDV, mL & 163.4 \(\pm\) 31.4 & 174.3 \(\pm\) 33.7 *** & 155 \(\pm\) 28.2 & 164.7 \(\pm\) 30 *** & 185.6 \(\pm\) 29 \({}^{\dagger\dagger}\) & 197.7 \(\pm\) 32 ***,\({}^{\dagger\dagger}\) \\
3D-RV EDV, mL/m\({}^{2}\) & 72.7 \(\pm\) 12.3 & 77.8 \(\pm\) 12.7 *** & 73.4 \(\pm\) 13.2 & 77.8 \(\pm\) 13.6 *** & 71.4 \(\pm\) 9.6 & 77.7 \(\pm\) 10.6 *** \\
3D-RV ESV, mL & 80.1 \(\pm\) 16.9 & 81.8 \(\pm\) 19.2 & 75.4 \(\pm\) 14.2 & 76.8 \(\pm\) 17.1 & 93 \(\pm\) 18.2 \({}^{\dagger\dagger}\) & 93.7 \(\pm\) 19 \({}^{\dagger\dagger}\) \\
3D-RV ESV, mL/m\({}^{2}\) & 35.6 \(\pm\) 6.3 & 36.4 \(\pm\) 7.4 & 35.7 \(\pm\) 6.5 & 36.2 \(\pm\) 7.8 & 35.7 \(\pm\) 6.1 & 36.9 \(\pm\) 6.5 \\ RV basal diameter, mm & 47.2 \(\pm\) 4.9 & 48.2 \(\pm\) 4.7 & 45.4 \(\pm\) 4.1 & 46.3 \(\pm\) 4 & 50.9 \(\pm\) 4.1 \({}^{\dagger\dagger}\) & 52 \(\pm\) 37 \({}^{\dagger\dagger}\) \\ RV basal diameter i, mm/m\({}^{2}\) & 20.9 \(\pm\) 2.4 & 21.4 \(\pm\) 2 & 21.5 \(\pm\) 2 & 21.9 \(\pm\) 2 & 19.8 \(\pm\) 2.7 & 20.5 \(\pm\) 1.6 \\ RV mid diameter, mm & 40 \(\pm\) 4.6 & 41 \(\pm\) 4.3 & 38.8 \(\pm\) 4 & 39.6 \(\pm\) 3.3 & 42.5 \(\pm\) 4.8 \({}^{\dagger\dagger}\) & 43.7 \(\pm\) 4.8 \({}^{\dagger\dagger}\) \\ RV mid diameter i, mm/m\({}^{2}\) & 17.8 \(\pm\) 2.4 & 18.3 \(\pm\) 2.2 & 18.4 \(\pm\) 2 & 18.8 \(\pm\) 1.8 & 16.6 \(\pm\) 2.8 & 17.3 \(\pm\) 2.6 \\ RVOUT PLAX diameter, mm & 31.3 \(\pm\) 4.8 & 31.2 \(\pm\) 5 & 29.7 \(\pm\) 1.9 & 29.5 \(\pm\) 4.6 & 33.7 \(\pm\) 4.4 \({}^{\dagger}\) & 33.9 \(\pm\) 4.4 \({}^{\dagger}\) \\ RVOUT PLAX diameter i, mm/m\({}^{2}\) & 13.7 \(\pm\) 1.8 & 13.6 \(\pm\) 1.8 & 14 \(\pm\) 2 & 13.9 \(\pm\) 1.9 & 13.1 \(\pm\) 1.2 & 13.3 \(\pm\) 1.6 \\ RV longitudinal diameter, mm & 95.4 \(\pm\) 7.3 & 97 \(\pm\) 62 \({}^{\star}\) & 93.8 \(\pm\) 6.7 & 95.6 \(\pm\) 6.2 \({}^{\star}\) & 99.3 \(\pm\) 7.1 \({}^{\dagger\dagger}\) & 100.5 \(\pm\) 48 \({}^{\dagger\dagger}\) \\ RV longitudinal diameter i, mm/m\({}^{2}\) & 42.9 \(\pm\) 4.5 & 43.8 \(\pm\) 4.2 \({}^{\star}\) & 44.6 \(\pm\) 3.7 & 45.3 \(\pm\) 3.5 & 38.5 \(\pm\) 3.5 \({}^{\dagger\dagger}\) & 39.9 \(\pm\) 3.3 \({}^{\star\dagger}\) \\ RV wall thickness, mm & 2.7 \(\pm\) 0.6 & 2.6 \(\pm\) 0.6 & 2.5 \(\pm\) 0.5 & 2.4 \(\pm\) 0.6 & 3 \(\pm\) 0.7 & 2.8 \(\pm\) 0.6 \({}^{\dagger}\) \\ \hline \multicolumn{7}{c}{**RV Function**} \\ \hline
3D-RV global EF, \% & 51 \(\pm\) 4 & 53.2 \(\pm\) 3.7 ** & 51.2 \(\pm\) 4 & 53.6 \(\pm\) 3.5 ** & 50.1 \(\pm\) 3.8 & 52.3 \(\pm\) 4.2 \\
3D-RV FW strain, \% & \(-\)27.3 \(\pm\) 3.6 & \(-\)27.7 \(\pm\) 2.8 & \(-\)27.4 \(\pm\) 3.6 & \(-\)28 \(\pm\) 3 & \(-\)27.5 \(\pm\) 3.3 & \(-\)27.1 \(\pm\) 2.3 \\ TDI RV lateral peak s\({}^{\prime}\),cm/s & 13.9 \(\pm\) 2.6 & 13.8 \(\pm\) 2 & 14 \(\pm\) 2.6 & 14 \(\pm\) 2 & 13.7 \(\pm\) 2.6 & 13.6 \(\pm\) 2.1 \\ TDI RV lateral peak e\({}^{\prime}\),cm/s & 13.4 \(\pm\) 2.1 & 12.7 \(\pm\) 2.9 & 13.5 \(\pm\) 2.2 & 12.7 \(\pm\) 2.9 & 13.5 \(\pm\) 2.3 & 12.5 \(\pm\) 3.2 \\ TAPSE, mm & 25.3 \(\pm\) 4.4 & 25.9 \(\pm\) 3.5 & 24.2 \(\pm\) 3.7 & 25.7 \(\pm\) 3.5 & 27.5 \(\pm\) 4.5 & 26.2 \(\pm\) 3.4 \\ \hline \multicolumn{7}{c}{**RA Dimensions**} \\ \hline RA ESV volume, mL & 51.9 \(\pm\) 13.2 & 58.1 \(\pm\) 14 *** & 50.3 \(\pm\) 13.5 & 54.6 \(\pm\) 13 *** & 55.1 \(\pm\) 12.5 & 65 \(\pm\) 13.7 ***,\({}^{\dagger}\) \\ RA ESV volume i, mL/m\({}^{2}\) & 23 \(\pm\) 6 & 25.7 \(\pm\) 5.6 *** & 23.9 \(\pm\) 6.6 & 25.8 \(\pm\) 6 *** & 21.3 \(\pm\) 4.5 & 25.5 \(\pm\) 4.7 *** \\ \hline \multicolumn{7}{c}{Values are mean \(\pm\) SD.