## 3 Results and Discussion
Analyzing the data from the graphs, it can also be seen that for normal movements with the lowest tested size ratio K = 2.5, regardless of the range of movement (C\({}_{1}\), C\({}_{2}\), C\({}_{3}\)), the decrease in the acceleration value in the deceleration phase in relation to the acceleration phase was very similar and amounted to 23%. Against this background, it is worth analyzing the operator's hand movements. The average velocities of the operator's hand in the steady phase of the movement (PS) for fast and normal movements are presented in Table 3.  
Analyzing the obtained hand movement velocities, it can be noticed that the operator obtains the highest values of hand movement velocity at the largest range of movement (C\({}_{1}\)) and for the smallest size ratios (K = 2.5), and they are 0.529 m/s for normal movements  
Figure 11: Effector’s accelerations for size ratio K = 5: (**a**) acceleration phase, (**b**) deceleration phase. Figure 12: Effector’s accelerations for size ratio K = 2.5: (**a**) acceleration phase, (**b**) deceleration phase. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Movement Type**} & \multirow{2}{*}{**Size Ratio K**} & \multirow{2}{*}{**Parameter Name**} & \multicolumn{3}{c}{**Range of Hand Movement**} \\ \cline{3-5}  & & & **C\({}_{1}\)** & **C\({}_{2}\)** & **C\({}_{3}\)** \\ \hline \multirow{3}{*}{Normal movement} & \(\times 10\) & \(v_{8}\) [m/s] & 0.376 & 0.245 & 0.167 \\  & \(\times 5\) & \(v_{8}\) [m/s] & 0.443 & 0.307 & 0.176 \\  & \(\times 2.5\) & \(v_{8}\) [m/s] & 0.529 & 0.329 & 0.197 \\ \hline \multirow{3}{*}{Fast movement} & \(\times 10\) & \(v_{8}\) [m/s] & 0.719 & 0.436 & 0.237 \\  & \(\times 5\) & \(v_{8}\) [m/s] & 0.743 & 0.474 & 0.241 \\  & \(\times 2.5\) & \(v_{8}\) [m/s] & 0.795 & 0.488 & 0.258 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Average velocities of the operator’s hand movement in the steady phase for the tested ranges of movement and strengthening. and 0.793 m/s for fast movements, respectively. These velocities, in relation to the size ratio K = 10 and the same range of C\({}_{1}\) movement, are as much as about 40% higher for normal movements and 10% higher for fast movements. They are 0.376 m/s and 0.719 m/s, respectively. It should be noted that the velocity differences for fast movements and different size ratios are relatively small, while the normal velocities for different size ratios are significantly different. In the case of other size ratios and ranges of movement, the velocity values of fast movements are higher than for normal movements, ranging from 30% for reinforcement K = 2.5 and range of movement C\({}_{3}\) to 78% for reinforcement K = 10 and range of movement C  
Analyzing the duration of individual movements, it can be noticed that in the case of normal movements (Figure 13), as the size ratio decreased, the duration of the acceleration, steady state, and deceleration phases also decreased. For example, for the C\({}_{2}\) movement range and size ratio K = 10, the movement duration was 3.4 s; for size ratio K = 5, the movement duration was 2.7 s; and for size ratio K = 2.5, it was 2.1 s.  
The deceleration phase (PD) has the largest share in the entire movement and on average constitutes 60% of the entire movement duration. The steady phase (PS) has the smallest share in the entire movement, which ranges from 15 to 20% for the C\({}_{1}\) range of motion and 2 to 5% for the C\({}_{3}\) range of motion. Analyzing the duration of fast movements (Figure 14), it can be concluded that the deceleration phase has the dominant share in the entire work cycle, as in normal movements, it constitutes on average 60% of the movement duration, regardless of the length of the movement and the size ratio. The total duration of fast movements for individual reinforcements (K = 10, K = 5, K = 2.5) is at a similar level, and for the C\({}_{1}\) range of motion, it is 2.5 s, 2.3 s, and 2.2 s, respectively.