## 3 Results
### Acute Bout of Exercise  
The basic measurements obtained from the participants over the measured time points are displayed in Table 1.  
When considering the effect of the exercise bout, measurements of AT length for both the RUN and the CONT group remain stable over the six measured time points with no significant differences apparent over time (\(p\) > 0.05). In the CONT group, no significant differences occurred over the time points for either max AP or SWV. In contrast, the RUN group experienced significant changes (\(p\) < 0.05) in max AP and SWV. The results demonstrated significant differences in the data for the RUN group in relation to the max AP diameter. The absolute difference, % difference and the significance of the significant differences in max AP diameter are shown in Table 2. \begin{table}
\begin{tabular}{c c c c c c c} \hline  & **PRE** & **POST** & **6 h POST** & **24 h POST** & **48 h POST** & **72 h POST** \\ \hline RUN AT Length (mm) & 44.3 \(\pm\) 11.2 & 45.0 \(\pm\) 11.2 & 44.8 \(\pm\) 11.3 & 44.1 \(\pm\) 11.1 & 44.3 \(\pm\) 11.1 & 44.1 \(\pm\) 10.8 \\ CONT AT Length (mm) & 29.9 \(\pm\) 5.7 & 29.6 \(\pm\) 6.2 & 30.0 \(\pm\) 5.9 & 30.0 \(\pm\) 5.6 & 30.2 \(\pm\) 5.6 & 30.0 \(\pm\) 5.2 \\ RUN Max AP (mm) & 4.37 \(\pm\) 0.27 & 4.08 \(\pm\) 0.19 & 4.58 \(\pm\) 0.29 & 4.38 \(\pm\) 0.26 & 4.45 \(\pm\) 0.31 & 4.34 \(\pm\) 0.28 \\ CONT Max AP (mm) & 4.66 \(\pm\) 0.64 & 4.69 \(\pm\) 0.63 & 4.63 \(\pm\) 0.64 & 4.71 \(\pm\) 0.61 & 4.63 \(\pm\) 0.69 & 4.66 \(\pm\) 0.63 \\ RUN SWV (m/s) & 9.16 \(\pm\) 0.39 & 9.43 \(\pm\) 0.39 & 9.00 \(\pm\) 0.42 & 9.19 \(\pm\) 0.31 & 9.04 \(\pm\) 0.36 & 9.05 \(\pm\) 0.28 \\ CONT SWV (m/s) & 9.11 \(\pm\) 0.23 & 9.08 \(\pm\) 0.22 & 9.04 \(\pm\) 0.26 & 9.05 \(\pm\) 0.22 & 9.06 \(\pm\) 0.21 & 9.09 \(\pm\) 0.22 \\ \hline \end{tabular}
\end{table} 
Table 1: AT Length (mm), AT maximum anterior-posterior (Max A-P) diameter (mm) and SWV at all measured time points for both RUN and CONT group. With regards to measures of SWV, the results demonstrated a significant main effect of Time (\(p\) = 0.001), no significant differences between the groups (\(p\) > 0.05) but a significant interaction effect of time \(\times\) group (\(p\) = 0.003), implying a significant difference between the measured time points depending on which group a participant was in. The absolute differences and significance values for the SWV data is shown in Table 3 and the mean alterations in SWV for the RUN group are shown in Figure 2. There were no significant differences in the time points for the CONT group (\(p\) = 0.614) implying that the SWV data collected for all the participants in the CONT group did not vary significantly over the measured time points and therefore remained stable. \begin{table}
\begin{tabular}{c c c c} \hline  & **Absolute Difference** & **\% Difference** & **Significance** \\ \hline Pre-Post & \(-0.27\) m/s & \(-2.95\%\) & \(P\) = 0.037 * \\ Post-6 h & \(-0.43\) m/s & \(-4.56\%\) & \(P\) = 0.019 * \\ Post-48 h & \(-0.39\) m/s & \(-4.14\%\) & \(P\) = 0.015 * \\ Post-72 h & \(-0.38\) m/s & \(-4.03\%\) & \(P\) = 0.013 * \\ \hline \end{tabular}
\end{table} 
Table 3: Absolute difference, % difference and p value for the significant differences shown in SWV. \begin{table}
\begin{tabular}{c c c c} \hline  & **Absolute Difference** & **\% Difference** & **Significance** \\ \hline Pre-Post & \(-0.29\) mm & \(-6.64\%\) & \(p\) = 0.000 ** \\ Pre-6 h & \(0.21\) mm & \(4.81\%\) & \(p\) = 0.042 * \\ Post-6 h & \(0.50\) mm & \(12.25\%\) & \(p\) = 0.000 ** \\ Post-24 h & \(0.30\) mm & \(7.35\%\) & \(p\) = 0.000 ** \\ Post-48 h & \(0.37\) mm & \(9.07\%\) & \(p\) = 0.000 ** \\ Post-72 h & \(0.26\) mm & \(6.37\%\) & \(p\) = 0.000 ** \\ Post-6 h–Post-24 h & \(-0.20\) mm & \(-4.37\%\) & \(p\) = 0.028 * \\ \hline \end{tabular}
\end{table} 
Table 2: Absolute difference, % difference and p value for the significant differences shown in max AP diameter. * = \(p\) < 0.05, ** = \(p\) < 0.01.