## 3 Results  
Descriptive statistics (mean \(\pm\) SD) for RSI and sprint times are presented in Table 1. Descriptive statistics for the step kinematics for each section are detailed in Table 2. Correlations between RSI and CT\({}_{\text{JUMP}}\), jump height and sprint times are reported in Table 3. Correlations between RSI and its derivatives and sprint kinematics of steps 2 and 3 are reported in Table 4, steps 5 and 6 in Table 5, steps 10 and 11 in Table 6, and steps 15 and 16 in Table 7. Large relationships were observed between RSI and 5-10 m, 10-20 m, 20-30 m, and 0-30 m times. There was a large, significant relationship between RSI and CT\({}_{\text{SPRINT}}\). Further, large significant relationships were observed between RSI and Velocity in the 10-20 m section and between CT\({}_{\text{JUMP}}\) and CT\({}_{\text{SPRINT}}\) in the 20-30 m section. Large relationships were observed between RSI and Velocity in each section. All other relationships between RSI, CT\({}_{\text{JUMP}}\), jump height and step length, step frequency, and flight time were small or moderate non-significant relationships.  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & **RSI** & **CT\({}_{\text{JUMP}}\)** & **Jump Height** & \
\begin{tabular}{c} **Step** \\ **Length** \\ \end{tabular} &
\begin{tabular}{c} **Step** \\ **Frequency** \\ \end{tabular} & **Velocity** & **CT\({}_{\text{SPRINT}}\)** & **Flight Time** \\ \hline RSI & 1 & & & & & & & \\ CT\({}_{\text{JUMP}}\) & \(\mathbf{-0.774*}\) & \(1\) & & & & & & \\ Jump height & \(\mathbf{0.907*}\) & \(-0.443\) & \(1\) & & & & & \\ Step length & \(0.225\) & \(-0.059\) & \(0.261\) & \(1\) & & & & \\ Step frequency & \(0.115\) & \(-0.221\) & \(0.048\) & \(\mathbf{-0.840*}\) & \(1\) & & & \\ Velocity & \(\mathbf{0.616*}\) & \(-0.520\) & \(0.552\) & \(0.271\) & \(0.287\) & \(1\) & & \\ CT\({}_{\text{SPRINT}}\) & \(-0.459\) & \(0.468\) & \(-0.348\) & \(0.346\) & \(-0.556\) & \(0.397\) & \(1\) & \\ Flight time & \(0.185\) & \(-0.052\) & \(0.194\) & \(\mathbf{0.742*}\) & \(\mathbf{-0.779*}\) & \(-0.067\) & \(-0.079\) & \(1\) \\ \hline  & & & & & & & \\ \end{tabular}
\end{table}
Table 6: Inter-correlation matrix between RSI and step kinematics of steps 10 and 11 (10–20 m section).  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & **RSI** & **CT\({}_{\text{JUMP}}\)** & **Jump Height** & \
\begin{tabular}{c} **Step** \\ **Length** \\ \end{tabular} &
\begin{tabular}{c} **Step** \\ **Frequency** \\ \end{tabular} & **Velocity** & **CT\({}_{\text{SPRINT}}\)** & **Flight Time** \\ \hline RSI & 1 & & & & & & \\ CT\({}_{\text{JUMP}}\) & \(\mathbf{-0.774*}\) & \(1\) & & & & & \\ Jump height & \(\mathbf{0.907*}\) & \(-0.443\) & \(1\) & & & & \\ Step length & \(0.182\) & \(0.062\) & \(0.281\) & \(1\) & & & \\ Step frequency & \(0.117\) & \(0.248\) & \(0.030\) & \(\mathbf{-0.836*}\) & \(1\) & & & \\ Velocity & \(0.563\) & \(-0.345\) & \(0.586\) & \(0.432\) & \(0.125\) & \(1\) & & \\ CT\({}_{\text{SPRINT}}\) & \(-0.437\) & \(0.330\) & \(0.416\) & \(0.519\) & \(\mathbf{-0.791*}\) & \(-0.367\) & \(1\) & \\ Flight time & \(0.234\) & \(0.089\) & \(0.361\) & \(\mathbf{0.769*}\) & \(\mathbf{-0.757*}\) & \(0.142\) & \(0.212\) & \(1\) \\ \hline  & & & &