## 3 Results  
Figure 2 presents a detailed analysis of joint angular displacements for both machining workstation employees (MWEs) and assembly workstation employees (AWEs). The data reveal that the MWE group (blue bars) generally operated within a notably wider range of motion (ROM)--roughly double--compared to the AWE group (green bars) across all evaluated measures (encompassing both left and right sides, as well as central segments). Statistically significant differences in ROM were observed between the MWE and AWE groups in almost all measured aspects, except for movements involving shoulder and elbow flexion-extension. Notably, the MWE group exhibited symmetrical movement patterns with a minor inclination towards the right side. In contrast, the AWE group displayed more pronounced asymmetry, especially in the movements of the shoulder and elbow joints. Figure 2: The results of angular displacements (in degrees) for the machining workstation employees (MWEs) and assembly workstation employees (AWEs). The median \(\pm\) IQR of the range of motion(ROM) in specific joints for the left or right side, as well as the central segment, are presented. The MWE group is represented by blue bars and the AWE group by green bars. Significant differences between MWE and AWE groups are marked with an asterisk (*), based on \(p\)-values calculated using the unpaired Mann-Whitney U-test. Differences between the left and right sides within groups are indicated with a hash (#), based on \(p\)-values calculated using the dependent samples Wilcoxon signed-rank test. Figure 3 presents the findings of the highest angular velocities achieved, measured in degrees per second, by employees at the machining (MWE) and assembly workstations (AWE). There was a notable variance in movement speeds between the two groups across all measured parameters. Specifically, the machining group (blue bars) exhibited significantly higher activity, with peak velocities reaching up to eight-fold greater, particularly in lumbar and thoracic rotations, compared to the assembly group (green bars). In terms of the range of motion (ROM), the MWE group demonstrated comparable velocities for both left and right sides, with the exception of shoulder abduction and rotation, where the differences were statistically significant (\(p<0.05\)). In contrast, the AWE group displayed greater maximum speeds predominantly on the right side for all upper extremity movements, with these differences also being statistically significant (\(p<0.05\)). Figure 3: The results of maximum angular velocity (in degrees per second) for the machining workstation employees (MWEs) and assembly workstation employees (AWEs). The median \(\pm\) IQR of the maximum angular velocity in specific joints for the left or right side, as well as the central segment, are presented. The MWE group is represented by blue bars and the AWE group by green bars. Significant differences between MWE and AWE groups are marked with an asterisk (*), based on \(p\)-values calculated using the unpaired Mann–Whitney U-test. Differences between the left and right sides within groups are indicated with a hash (#), based on \(p\)-values calculated using the dependent samples Wilcoxon signed-rank test. The highest linear accelerations, as displayed in Table 2, recorded on average for all upper extremity and central body segments, did not surpass 0.33 m/s\({}^{2}\) (approximately 2.5% of gravitational acceleration). In line with earlier findings, the MWE group exhibited more dynamic movements, showing notably higher accelerations than the AWE group across all acceleration measurements. Contradicting prior reports, the right side was less dynamic for both groups. All observed lateral differences between the groups were statistically significant, with \(p\)-values less than 0.05.