# Inter-Session Repeatability of Marker-Less Motion Capture of Treadmill Running Gait
## 3 Results
### Reliability of Discrete Metrics
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline  & \multicolumn{8}{c}{**Peak Angles During Stance**} \\ \hline  & \multicolumn{4}{c}{**Mean (SD) [Deg.]**} & \multicolumn{4}{c}{**ICC\({}_{(3,1)}\)**} & \multicolumn{2}{c}{**95\% CI**} & \multicolumn{2}{c}{**SEM**} & \multicolumn{1}{c}{**MDC**} \\  & \multicolumn{2}{c}{**Day 1**} & \multicolumn{2}{c}{**Day 2**} & \multicolumn{2}{c}{**Day 3**} & \multicolumn{2}{c}{**Lower**} & \multicolumn{1}{c}{**Upper**} & \multicolumn{1}{c}{**[Deg.]**} & \multicolumn{1}{c}{**[Deg.]**} \\ \hline
**Knee** & & & & & & & & & & \\ Flexion & 41.1 & (4.0) & 41.1 & (3.8) & 41.2 & (4.2) & 0.902 & 0.856 & 0.936 & 0.87 & 2.4 \\ Adduction & 2.7 & (2.9) & 2.3 & (2.5) & 2.6 & (2.8) & 0.922 & 0.884 & 0.949 & 0.60 & 1.7 \\ Internal Rotation & 11.2 & (4.5) & 11.4 & (4.8) & 11.5 & (4.6) & 0.842 & 0.772 & 0.895 & 1.01 & 2.8 \\
**Hip** & & & & & & & & & & \\ Flexion & 26.6 & (4.6) & 26.9 & (4.9) & 27.0 & (5.4) & 0.916 & 0.877 & 0.946 & 1.09 & 3.0 \\ Adduction & 11.7 & (2.4) & 12.0 & (2.2) & 12.1 & (2.4) & 0.908 & 0.865 & 0.940 & 0.52 & 1.4 \\ Internal Rotation & 5.0 & (2.0) & 4.9 & (2.0) & 5.0 & (1.7) & 0.487 & 0.338 & 0.626 & 0.41 & 1.1 \\
**Pelvis** & & & & & & & & & & \\ Anterior Tilt & 8.1 & (3.3) & 8.2 & (2.7) & 8.5 & (3.3) & 0.662 & 0.540 & 0.765 & 0.68 & 1.9 \\ Drop & 4.6 & (1.7) & 4.7 & (1.5) & 5.0 & (1.9) & 0.871 & 0.812 & 0.915 & 0.37 & 1.0 \\ Ipsilateral Rotation & 5.5 & (2.2) & 6.1 & (2.3) & 6.0 & (2.3) & 0.783 & 0.693 & 0.854 & 0.50 & 1.4 \\
**Trunk** & & & & & & & & & & \\ Forward Lean & 6.9 & (4.4) & 6.7 & (4.7) & 6.5 & (4.4) & 0.958 & 0.937 & 0.973 & 0.98 & 2.7 \\ Contralateral & 1.9 & (1.3) & 1.9 & (1.4) & 2.4 & (1.3) & 0.831 & 0.758 & 0.888 & 0.29 & 0.8 \\ Flexion & 13.9 & (3.6) & 14.0 & (3.9) & 13.9 & (3.7) & 0.952 & 0.928 & 0.969 & 0.81 & 2.3 \\ \hline  & & & & & & & & & & & \\ \end{tabular} Note: SD = standard deviation; ICC = intraclass correlation coefficient; CI = confidence interval; SEM = standard error of measurement; MDC = minimal detectable change.  
\end{table} 
Table 4: _Cont._ \begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline  & \multicolumn{8}{c}{**Toe Off**} \\ \hline  & \multicolumn{4}{c}{**Mean (SD) [Deg.]**} & \multicolumn{4}{c}{**ICC\({}_{(3,1)}\)**} & \multicolumn{2}{c}{**95\% CI**} & \multicolumn{2}{c}{**SEM**} & \multicolumn{1}{c}{**MDC**} \\  & \multicolumn{2}{c}{**Day 1**} & \multicolumn{2}{c}{**Day 2**} & \multicolumn{2}{c}{**Day 3**} & \multicolumn{2}{c}{**Lower**} & \multicolumn{1}{c}{**Upper**} & \multicolumn{1}{c}{**[Deg.]**} & \multicolumn{1}{c}{**[Deg.]**} \\ \hline
**Ankle** & & & & & & & & & & & \\ Plantarflexion & 27.1 & (4.0) & 27.8 & (3.6) & 28.1 & (3.7) & 0.917 & 0.878 & 0.946 & 0.36 & 1.0 \\ Rearfoot Inversion & 10.8 & (1.7) & 10.7 & (1.7) & 10.8 & (1.8) & 0.644 & 0.518 & 0.752 & 0.23 & 0.6 \\ External Rotation & 11.7 & (2.4) & 13.0 & (2.3) & 13.1 & (2.8) & 0.501 & 0.353 & 0.638 & 0.42 & 1.2 \\
**Knee** & & & & & & & & & & \\ Flexion & 10.3 & (3.9) & 10.0 & (4.1) & 9.6 & (4.8) & 0.917 & 0.878 & 0.946 & 0.35 & 1.0 \\ Adduction & 0.4 & (1.7) & 0.5 & (1.9) & 0.4 & (1.8) & 0.911 & 0.869 & 0.942 & 0.13 & 0.4 \\ External Rotation & 22.1 & (4.7) & 22.3 & (4.4) & 22.7 & (4.6) & 0.827 & 0.752 & 0.885 & 0.39 & 1.1 \\
**Hip** & & & & & & & & & & \\ Extension & 18.3 & (3.7) & 18.7 & (3.1) & 18.9 & (3.5) & 0.659 & 0.536 & 0.763 & 0.26 & 0.7 \\ Adduction & 1.7 & (2.5) & 1.9 & (2.4) & 2.2 & (2.8) & 0.860 & 0.797 & 0.908 & 0.20 & 0.6 \\ Internal Rotation & 2.3 & (2.9) & 2.0 & (2.7) & 2.7 & (2.6) & 0.703 & 0.591 & 0.796 & 0.25 & 0.7 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Reliability of key kinematic metrics at toe off across three distinct sessions and three distinct speeds in 21 runners.