# Test-Retest Intra-Session Reliability of Isokinetic Knee Strength Measurements in Obese Children
## 3 Results
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline  & \multirow{2}{*}{**Test**} & \multicolumn{8}{c}{**Peak Torque (Nm)**} & \multicolumn{8}{c}{**Work (D)**} \\ \cline{3-13}  & & **Test** & **ICC (95\% CD)** & **SEM** & **SEM** & **SEM** & **SRD** & **SRD** & **ICC (95\% CD)** & **SEM** & **SEM** & **SRD** & **SRD** \\  & **Measurement** & **ICC (95\% CD)** & **(Nm)** & **(\%)** & **(Nm)** & **(\%)** & **ICC (95\% CD)** & **(Nm)** & **(\%)** & **(Nm)** & **(\%)** \\ \hline \multirow{4}{*}{**C**} & Concentric & \multirow{4}{*}{0.984 (0.965-0.993)} & \multirow{4}{*}{2.71} & \multirow{4}{*}{4.71} & \multirow{4}{*}{7.52} & \multirow{4}{*}{13.06} & \multirow{4}{*}{0.975 (0.944-0.989)} & \multirow{4}{*}{3.51} & \multirow{4}{*}{6.01} & \multirow{4}{*}{9.73} & \multirow{4}{*}{16.67} \\  & Extension Test & & & & & & & & & & \\  & Concentric & 0.956 (0.905-0.980) & & & & & & & & & \\  & Flexion Test & & & & & & & & & & \\ \hline \multirow{4}{*}{**C**} & \multirow{4}{*}{**Test**} & \multicolumn{8}{c}{**Peak Torque (Nm)**} & \multicolumn{8}{c}{**Work (D)**} \\ \cline{3-13}  & & **Test** & \multirow{4}{*}{**Measurement**} & **ICC (95\% CD)** & **SEM** & **SEM** & **SRD** & **SRD** & **SRC** & **ICC (95\% CD)** & **SEM** & **SEM** & **SRD** & **SRC** \\  & & & & & & & & & & & \\ \cline{1-1}  & Concentric & 0.977 (0.950-0.990) & & & & & & & & & & \\ \cline{1-1}  & Extension Test & & & & & & & & & & & \\ \cline{1-1}  & Concentric & 0.938 (0.866-0.972) & & & & & & & & & & \\ \cline{1-1}  & Flexion Test & & & & & & & & & & & \\ \hline \multirow{4}{*}{**C**} & \multirow{4}{*}{**Test**} & \multicolumn{8}{c}{**Peak Torque (Nm)**} & \multicolumn{8}{c}{**Work (D)**} \\ \cline{3-13}  & & **Measurement** & **ICC (95\% CD)** & **SEM** & **SEM** & **SRD** & **SRC** & **ICC (95\% CD)** & **SEM** & **SEM** & **SEM** & **SRD** & **SRC** \\ \cline{1-1}  & & **Increment** & & & & & & & & & & \\ \cline{1-1}  & **Increment** & & & & & & & &  
Figure 1 shows Bland-Altman plots peak torque. Bland-Altman plots indicated that none of the points were outside the 95% LOA. Figure 2 shows the Bland-Altman plots work. Bland-Altman plots indicated that the points outside the 95% LOA were 6% for both \begin{table}
\begin{tabular}{l c c c c c c c c} \hline \hline
**Test Measurement** & **Test** & **Retest** & \(p\) & **ICC (95\% CD)** & \begin{tabular}{c} **SEM** \\ **(Nm)** \\ \end{tabular} & \begin{tabular}{c} **SEM** \\ **(\%)** \\ \end{tabular} & \
\begin{tabular}{c} **SRD** \\ **(Nm)** \\ \end{tabular} &
\begin{tabular}{c} **SRD** \\ **(\%)** \\ \end{tabular} \\ \hline Peak Torque Ratio & 0.51 \(\pm\) 0.12 & 0.53 \(\pm\) 0.13 & 0.202 & 0.874 (0.738–0.942) & 0.04 & 8.62 & 0.12 & 23.91 \\ \hline \hline \end{tabular}  
\(p\)-values of paired \(t\)-test; ICC: Intra-class Correlation Coefficient; CI: Confidence Interval; SEM: Standard Error Measurement SRD: Small Real Difference.  
\end{table} 
Table 4: Summary and reliability of isokinetic peak torque ratio at 60°s on two occasions (\(n=25\)). Figure 1: Bland–Altman plots peak torque. Bland–Altman plots indicated that the points outside the 95% LOA were 6% for both extensors and flexors.