## 4 Discussion  
First, here, we will focus on the pairs of criteria in consonance dependence according to the three applied analyses in this investigation. The criteria pairs in consonance detected by ICrA, PCA, and SCA for the phases of flexion and extension are summarized in Table 7.  
As can be seen from Table 7, ICrA and SCA found the same correlation pairs for flexion and extension phases. The PCA results were identical to those of ICrA and SCA when considering flexion pairs. PCA found two additional pairs in significant correlation for extension phases (eH10w-eH6w and eH10w-eH2w). Most relations in positive consonance were found for the phases of extension. Probably, this phase needs more muscle interactions to be performed precisely. It is hypothesized that the greater number of interactions during extension is a result of the neuromuscular mechanisms that increase joint stiffness to achieve better stabilization and kinetic control [42; 43]. As expected, the three methods found a correlation between the flexion phases performed for 1 s with and without added weight (fH1-fH1w). The other two dependencies found by all three methods were only between flexion phases with different execution durations, in which a weight was placed. As can be seen from Table 7, the correlation pairs were between flexion phases with very close duration, 10 s and 6 s (fH10w-fH6w) and 2 s and 1 s (fH2w-fH1w). Also, all three methods detected four identical correlation dependencies between extension phases. Three of them followed the logic described above. The correlation pairs were eH10-eH6, eH1-eH1w, and eH2w-eH1w. An unexpected correlation was found for the pair eH1-eH2w (weight existence). Furthermore, PCA detected one more unexpected correlation pair, namely eH10w-eH2w (too different velocities). These exceptions can be explained, since it is known that these approaches can find known as well as unknown relations. All detected pairs in consonance for the flexion and extension phases were between relatively fast (fH2, eH2; fH2w, eH2w; fH1, eH1; and fH1w, eH1w) or relatively slow (fH10, eH10w, eH10w; fH6, eH6; and fH6w, eH6w) performed phases. There was only one exception, eH10w-eH2w, discovered for the extension phases by Pearson's CA. It seems that the added weight of 0.5 kg did not influence the investigated correlations very much. Based on the found correlations for the flexion and extension phases from the same cyclic MT, the researcher can omit some tasks from the experimental protocol. For the participants, it is more sparing to perform easier movements rather than harder movements, \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **ICrA** & \multicolumn{2}{c}{**Pearson’s CA**} & \multicolumn{2}{c}{**Spearman’s CA**} \\ \hline
**Flexion** & **Extension** & **Flexion** & **Extension** & **Flexion** & **Extension** \\ \hline \multirow{3}{*}{fH1–fH1w} & eH10–eH6 & \multirow{3}{*}{fH1–eH1w} & eH10–eH6 & \multirow{3}{*}{fH1–eH1w} & eH10–eH6 \\  & eH1–eH2w & & eH1–eH1w & eH1–eH1w & eH1–eH1w & eH10–eH6 \\  & eH1–eH1w & & eH10w–eH6w & eH10w–eH6w & fH10w–eH6w & eH1–eH1w \\  & eH2w–eH1w & & eH10w–eH2w & fH2w–eH1w & eH2w–eH1w \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Detected by ICrA, PCA, and SCA criteria pairs in consonance. or shorter instead of longer ones [6; 44]. Following the previously discussed specifics of the movements in the experimental protocol (EP), two kinds of optimized EP and the full EP are presented in Table 8.  
The first optimized EP is obtained after several decisions considering the results obtained from the three decision-making methods. When focusing on fH1-fH1w and eH1-eH1w, we can easily see that the consonance pairs include flexion and extension phases with equal durations, but one phase is performed with an added load. Hence, it is logical for fH1w and eH1w, respectively, as harder-to-perform tasks, to be excluded from the EP. These phases are parts of the MT LOAD 10 that will be omitted from the EP.