## 3 Results
### Correlation  
Strong correlations were found between the results of the three tests conducted. The correlation coefficient between F0 data ranged from 0.85 to 0.88 (\(p\) < 0.001), and that between P0 data ranged from 0.87 to 0.94 (\(p\) < 0.001) (Table 4). Additionally, a strong relationship was observed between F0 and P0 data within the same tests (r = 0.93-0.97, \(p\) < 0.001). However, for V0 data, the correlations between the three tests were less important and not significant, except for CES V0 and HBP P0. The correlation coefficients were 0.48 (\(p\) = 0.02) and 0.28 (\(p\) = 0.189) between HBP and CES, and between HBP and SP, respectively. The correlation coefficient between SP V0 and CES V0 was 0.78 (\(p\) < 0.001).  
\begin{table}
\begin{tabular}{l c c c c c c c c c} \hline \hline  & \multicolumn{3}{c}{**F0 (N)**} & \multicolumn{3}{c}{**P0 (W)**} \\  & \multicolumn{2}{c}{**Absolute (N)**} & \multicolumn{2}{c}{**Relative (N.kg\({}^{-1}\))**} & \multicolumn{2}{c}{**V0 (m.s\({}^{-1}\))**} & \multicolumn{2}{c}{**Absolute (Watt)**} & \multicolumn{2}{c}{**Relative (Watt.kg\({}^{-1}\))**} \\ \hline HBP & 674 & (211.8) & 10.1 & (2.4) & 2.9 & (0.7) & 486.1 & (205.3) & 7.2 & (2.7) \\ CES & 470.6 & (127.4) & 7.1 & (1.3) & 3.5 & (0.5) & 426 & (164.7) & 6.3 & (1.7) \\ SP & 244 & (78.5) & 3.6 & (0.8) & 4.7 & (0.7) & 277.6 & (120.6) & 4.1 & (1.4) \\ \hline \end{tabular}
\end{table}
Table 2: Value of force–velocity–power relationship from the sprint test (SP), the horizontal ballistic push-off test (HBP), and the crank ergometer sprint test (CES).  
\begin{table}
\begin{tabular}{l c c c c c c} \hline \hline \multicolumn{1}{c}{\(p\)**Value**} & \multicolumn{2}{c}{**F0**} & \multicolumn{3}{c}{**P0**} \\  & \multicolumn{2}{c}{**Absolute**} & \multicolumn{2}{c}{**Relative**} & \multicolumn{2}{c}{**V0**} & \multicolumn{2}{c}{**Absolute**} & \multicolumn{2}{c}{**Relative**} \\ \hline HBP vs. CES & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & 0.01 & 0.01 \\ CES vs. SP & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 \\ SP vs. HBP & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 \\ \hline \hline \end{tabular} \(p\) value from an independent Sample \(t\)-test. F0 is the theoretical maximal force at null velocity, V0 is the maximal velocity at null force and P0 is the theoretical maximal power using the 2 nd degree polynomial on the power measured in function of velocity. Relative values are Force or Power divided by the body mass.  
\end{table}
Table 3: \(p\) value of force–velocity–power relationship from the sprint test (SP), the horizontal ballistic push-off test (HBP) and the crank ergometer sprint test (CES).  
The performance variables, such as maximum sprint speed (SP Vmax) and sprint time, showed a strong correlation with power measured on the HBP test without load, with respective correlation coefficients of 0.92 (\(p<0.001\)) and \(-0.88\) (\(p<0.001\)) and with CES Mean power with a respective correlation coefficient of 0.87 (\(p<0.001\)) and \(-0.85\) (\(p<0.001\)). In particular, the power measured on the HBP test without load exhibited a strong relationship with all the variables, especially with the maximum power measured during the sprint (r = 0.95, \(p<0.001\)).