## 3 Results
### Pre- and Post-Tests of Participants' Explosive Strength  
This study used a PASCO scientific biaxial force plate, which connected laboratory equipment to remote equipment (via Bluetooth and tablet connection). Participants stood on the force plate to perform the countermovement jump (CMJ), then stood still on the force plate for a few seconds after they landed. The pre- and post-test results obtained by the force plate included the RFD, the time of the RFD, the GRF at the moment of jumping, the time in the air, and the jump height. After an 8-week PT program, it was found that there were significant differences (\(p \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline  & \multicolumn{2}{c}{**RED, \(\pi\)**} & \multicolumn{2}{c}{**RED, \(\pi\)**} & \multicolumn{2}{c}{**RED, \(\pi\)**} & \multicolumn{2}{c}{**CRF at the Moment of Jungping, N**} & \multicolumn{2}{c}{**Duration of Passages, \(\pi\)**} & \multicolumn{2}{c}{**Jump Height, m**} \\
**\#** & **Pre-Test** & **Post-Test** & **Pre-Test** & **Post-Test** & **Pre-Test** & **Post-Test** & **Purpression (\%)** & **Pre-Test** & **Post-Test** & **Purpression (\%)** & **Pre-Test** & **Post-Test** & **Purpression (\%)** \\ \hline
1 & \(-0.943\) & \(-0.951\) & 0.124 & 0.121 & 1465.92 & 1529.98 & 4.37 & 0.853 & 0.541 & 7.55 & 0.310 & 0.391 & 26.13 \\
2 & \(-0.892\) & \(-0.911\) & 0.127 & 0.124 & 1496.63 & 1526.14 & 5.28 & 0.560 & 0.591 & 5.54 & 0.413 & 0.472 & 14.29 \\
3 & \(-0.954\) & \(-0.963\) & 0.113 & 0.107 & 1482.07 & 1561.71 & 5.33 & 0.604 & 0.643 & 6.446 & 0.545 & 0.624 & 14.50 \\
4 & \(-0.885\) & \(-0.941\) & 0.138 & 0.131 & 1964.54 & 1878.53 & 5.27 & 0.579 & 0.611 & 5.53 & 0.499 & 0.518 & 12.85 \\
5 & \(-0.944\) & \(-0.952\) & 0.122 & 0.118 & 1697.94 & 1753.62 & 3.28 & 0.531 & 0.582 & 9.60 & 0.352 & 0.431 & 22.44 \\
6 & \(-0.952\) & \(-0.961\) & 0.120 & 0.117 & 1571.91 & 1616.30 & 2.88 & 0.356 & 0.582 & 4.68 & 0.357 & 0.468 & 24.14 \\
7 & \(-0.941\) & \(-0.952\) & 0.119 & 0.114 & 1465.97 & 1584.29 & 4.48 & 0.572 & 0.619 & 8.22 & 0.411 & 0.470 & 14.36 \\
8 & \(-0.853\) & \(-0.865\) & 0.235 & 0.224 & 1742.56 & 1813.42 & 4.07 & 0.465 & 0.521 & 12.04 & 0.262 & 0.331 & 26.34 \\
9 & \(-0.785\) & \(-0.823\) & 0.227 & 0.221 & 2011.03 & 2807.11 & 18.70 & 0.419 & 0.489 & 8.43 & 0.253 & 0.331 & 20.83 \\
10 & \(-0.779\) & \(-0.816\) & 0.226 & 0.229 & 1984.21 & 2223.42 & 10.36 & 0.471 & 0.522 & 8.71 & 0.277 & 0.345 & 24.55 \\
11 & \(-0.785\) & \(-0.823\) & 0.227 & 0.221 & 1906.78 & 2266.27 & 14.54 & 0.484 & 0.533 & 10.12 & 0.244 & 0.363 & 27.82 \\
12 & \(-0.942\) & \(-0.953\) & 0.118 & 0.112 & 1428.53 & 1509.61 & 5.68 & 0.587 & 0.624 & 6.30 & 0.512 & 0.584 & 14.06 \\
13 & \(-0.947\) & \(-0.951\) & 0.120 & 0.115 & 1460.95 & 1514.43 & 3.66 & 0.575 & 0.611 & 6.26 & 0.486 & 0.554 & 13.99 \\
14 & \(-0.885\) & \(-0.911\) & 0.195 & 0.191 & 1753.61 & 1865.30 & 4.16 & 0.536 & 0.584 & 8.96 & 0.353 & 0.456 & 29.18 \\
15 & \(-0.913\) & \(-0.934\) & 0.187 & 0.175 & 1177.82 & 1809.67 & 5.35 & 0.548 & 0.569 & 3.83 & 0.368 & 0.443 & 20.38 \\ \hline \multicolumn{12}{c}{1+5.589\({}^{\star}\)(0.000)} & \multicolumn{1}{c}{1+ \(-4.538\)\({}^{\star}\)(0.000)} & \multicolumn{1}{c}{1+ \(-4.538\)\({}^{\star}\)(0.000)} & \multicolumn{1}{c}{1+ \(-15.801\)\({}^{\star}\)(0.000)} & \multicolumn{1}{c}{1+ \(-22.502\)\({}^{\star}\)(0.000)} \\ \hline \hline \end{tabular}  
* The first of force development is referred to as RFP (\(\pi\)); the ground motion force is referred to as CGF (\(\pi\)) for the duration of passage; the unit is seconds (s). Progression (\%) refers to the percentage difference between the pre- and post-tests. + fast values are presented as values (p-values) \(<0.05\).  
\end{table} 
Table 4: Data analysis of the CMJ via the force plate test \({}^{1}\). The time in seconds from the moment when the participant's feet touched the ground to when the feet left the ground was referred to as the time spent in the RFD.