# Influence of Knee Angle on Hametring/Quadriceps Strength Ratio in Male Soccer Players
## 3 Results  
In a seated position (with 90\({}^{\circ}\) of hip flexion), the H/Q ratio at 60\({}^{\circ}\)/s decreases as knee flexion increases (\(p<0.001\) and \(W=0.594\) (strong)). At 15\({}^{\circ}\) and 30\({}^{\circ}\) of knee flexion, higher H/Q ratios are observed [1.03 (0.88-1.21) and 0.83 (0.7-0.87)] but without significant differences between both angles (\(p=0.105\)) compared to ratios obtained at 45\({}^{\circ}\) knee flexion [0.63 (0.55-0.77)], 60\({}^{\circ}\) knee flexion [0.53 (0.48-0.61)], and 75\({}^{\circ}\) knee flexion [0.47 (0.43-0.62)] (\(p<0.05\) and [PERSON]'s r \(>0.5\) in all cases (large effect)) in all cases. As for the conventional H/Q ratio of 0.6 (0.54-0.65), significant differences were found between this and the H/Q ratio at 15\({}^{\circ}\) and 30\({}^{\circ}\) knee flexion (\(p<0.001\) and [PERSON]'s r \(>0.5\) (large effect)) in both cases; Table 1 and Figure 1).  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Variable** & **Median** & **\(p\)-Value** & **Kendall’s W** & **Post Hoc** & \(p\)**-Value** & **Wilcoxon’s R** \\ \hline H/Q ratio 1 at 15\({}^{\circ}  
Similarly, at 180\({}^{\circ}\)/s, the H/Q ratios decreased as the knee flexed. At 15\({}^{\circ}\) and 30\({}^{\circ}\) of knee flexion, higher H/Q ratios were observed [0.91 (0.6-1.11) and 0.7 (0.6-0.77)] without significant differences (\(p\) = 0.226) comparatively to the ratios obtained at 45\({}^{\circ}\) knee flexion [0.57 (0.51-0.65)], at 60\({}^{\circ}\) knee flexion [0.52 (0.41-0.64)], and at 75\({}^{\circ}\) knee flexion [0.53 (0.39-0.64)] (\(p\) < 0.05 and Wilcoxon's r > 0,5 (large effect) in all cases) As for the conventional H/Q ratio [0.65 (0.6-0.74)], significant differences were found between this and the H/Q ratio at 15\({}^{\circ}\), 45\({}^{\circ}\), 60\({}^{\circ}\), and 75\({}^{\circ}\) knee flexion (\(p\) < 0.05 and [PERSON]'s r > 0.5 (large effect in all cases; Table 2 and Figure 1).  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Variable** & \
\begin{tabular}{c} **Median** \\ **(Q1–Q3) 2** \\ \end{tabular} & \(p\)**-Value** & **Kendall’s W** & **Post Hoc** & \(p\)**-Value** &
\begin{tabular}{c} **Wilcoxon’s** \\ **R** \\ \end{tabular} \\ \hline H/Q ratio 1 at 15\({}^{\circ}\) knee flexion & 0.91 (0.6–1.11) & & & 15\({}^{\circ}\)-30\({}^{\circ}\) & 0.226 (0.001) & - \\ \hline H/Q ratio at 30\({}^{\circ}\) knee flexion & 0.7 (0.6–0.77) & \(<\)0.001 * & 0.357 (0.357) & 0.013 (0.357) & 0.69 (0.001) \\ \hline H/Q ratio at 30\({}^{\circ}\) knee flexion & 0.57 (0.51–0.65) & & & 15\({}^{\circ}\)-75\({}^{\circ}\) & 0.026 (0.001) & 0.59 (0.001) \\ \hline H/Q ratio at 45\({}^{\circ}\) knee flexion & 0.57 (0.51–0.65) & & & 15\({}^{\circ}\)-30\({}^{\circ}\) & 0.226 (0.001) & - \\ \hline \hline \end{tabular}
\end{table}
Table 2: H/Q ratios at 180\({}^{\circ}\)/s at different degrees of knee flexion (15\({}^{\circ}\), 30\({}^{\circ}\), 45\({}^{\circ}\), 60\({}^{\circ}\), and 75\({}^{\circ}\)) and conventional isokinetic H/Q strength ratio.  
Figure 1: H/Q ratios measured at 60\({}^{\circ}\)/s and 180\({}^{\circ}\)/s in a sitting position. The asterisk (*) represent extreme outliers, while circles (o) indicate mild outliers.