## 3 Results
### Cardiorespiratory Response to Ergonomic Risk  
The comparative results of the cardiovascular response between ER stratification at the start and the end of the acquisition are shown in Table 5.  
The same analysis results but for the respiratory variables can be verified in Table 6.  
Figure 7: Descriptive plots with the Tukey test results for the significant respiratory variables. URQ: Workstation; H1—medium cycle station; H2—long cycle station; H3—short cycle station; B: beginning; E: ending. The dashed line box represents a significant result in the within factor. The solid line represents significant differences in the between factors, with markers on its tips: B—circle; E—solid circle. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \multicolumn{11}{c}{**ER**} & \multicolumn{1}{c}{**Ex**} & \multicolumn{1}{c}{**\(\eta_{P}\)**} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} & \multicolumn{1}{c}{\(P_{Ph}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} & \multicolumn{1}{c}{\(P_{lat}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} \\ \cline{2-11} \multicolumn{1}{c}{**Variables**} & \multicolumn{1}{c}{**Low**} & \multicolumn{1}{c}{**Moderate**} & \multicolumn{1}{c}{**Moderate-High**} & \multicolumn{1}{c}{\(P_{B}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} & \multicolumn{1}{c}{\(P_{Ph}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} & \multicolumn{1}{c}{\(P_{lat}\)} & \multicolumn{1}{c}{\(\eta_{P}^{2}\)} \\ \cline{2-11} \multicolumn{1}{c}{} & **B** & **E** & **B** & **E** & **B** & **E** & & & & & & & \\ \hline RC (ppm) & 23.8 \(\pm\) 0.4 & 24.3 \(\pm\) 0.9 & 25.8 \(\pm\) 1.5 & 25.0 \(\pm\) 1.0 & 24.5 \(\pm\) 1.6 & 24.9 \(\pm\) 1.2 & 0.08\({}^{*}\) & 0.340 & 0.725 & 0.001 & +0.001 ** & 0.529 \\ Max RC (ppm) & 57.9 \(\pm\) 13.8 & 60.6 \(\pm\) 3.3 & 66.3 \(\pm\) 1.6 & 61.6 \(\pm\) 1.09 & 54.1 \(\pm\) 5.4 & 72.1 \(\pm\) 1.7 & 0.407 & 0.001 & 0.085 & 0.100 & 0.010 & 0.325 \\ Min RC (ppm) & 15.2 \(\pm\) 0.3 & 14.9 \(\pm\) 0.3 & 13.8 \(\pm\) 0.9 & 14.3 \(\pm\) 1.4 & 14.4 \(\pm\) 1.8 & 14.4 \(\pm\) 0.9 & 0.052 & 0.227 & 0.683 & 0.001 & 0.465 & 0.025 \\ SD RC (ppm) & 6.3 \(\pm\) 1.4 & 5.4 \(\pm\) 0.1 & 6.9 \(\pm\) 0.6 & 6.5 \(\pm\) 0.8 & 60.0 \(\pm\) 0.6 & 6.9 \(\pm\) 0.7 & \(\sim\)0.001 ** & 0.354 & 0.547 & 0.001 & 0.001* & 0.431 \\ ARD (ppm) & 24.3 \(\pm\) 0.2 & 24.8 \(\pm\) 0.7 & 25.2 \(\pm\) 0.8 & 24.9 \(\pm\) 0.3 & 24.6 \(\pm\) 1.3 & 24.0 \(\pm\) 0.9 & 0.147 & 0.155 & 0.714 & 0.001 & 0.103 & 0.146 \\ Max ABD (ppm) & 62.7 \(\pm\) 8.6 & 58.2 \(\pm\) 5.7 & 56.3 \(\pm\) 5.8 & 66.5 \(\pm\) 5.5 & 54.5 \(\pm\) 8.3 & 67.0 \(\pm\) 1.6 & 0.885 & 0.001 & \(<\)0.001 ** & 0.265 & \(<\)0.001 ** & 0.417 \\ Min ABD (ppm) & 13.7 \(\pm\) 0.3 & 14.6 \(\pm\) 0.7 & 14.1 \(\pm\) 0.7 & 14.5 \(\pm\) 0.4 & 14.1 \(\pm\) 0.8 & 13.3 \(\pm\) 1.4 & 0.028 * & 0.263 & 0.166 & 0.054 & 0.009 * & 0.349 \\ SD ADB (ppm) & 59.9 \(\pm\) 0.4 & 5.0 \(\pm\) 0.6 & 5.9 \(\pm\) 0.5 & 6.2 \(\pm\) 0.4 & 6.4 \(\pm\) 0.8 & 6.9 \(\pm\) 0.1 & 0.006 * & 0.375 & 0.012 * & 0.203 * & 0.008 * & 0.338 \\ RC (\%) & 60.2 \(\pm\) 13.3 & 61.5 \(\pm\) 13.8 & 57.1 \(\pm\) 7.8 & 58.6 \(\pm\) 8.1 & 55.9 \(\pm\) 9.4 & 56.2 \(\pm\) 8.8 & 0.487 & 0.043 & 0.042 * & 0.151 & 0.458 & 0.061 \\ Correlation (\%) & 63.0 \(\pm\) 15.0 & 61.0 \(\pm\) 2.0 & 53.0 \(\pm\) 2.0 & 34.0 & 54.0 \(\pm\) 15.0 & 50.0 \(\pm\) 16.0 & 0.040 & 0.153 & \(<\)0.001 * & 0.301 & \(<\)0.001 * & 0.326 \\ Phase Synchrony (\%) & 72.0 \(\pm\) 0.7 & 73.0 \(\pm\) 11.0 & 59.0 \(\pm\) 14.0 & 53.0 \(\pm\) 16.0 & 62.0 \(\pm\) 8.0 & 61.0 \(\pm\) 9.0 & 0.025 & 0.195 & 0.016 & 0.198 & 0.025 & 0.223 \\ \hline RCAfter being submitted to the Tukey post hoc test, and by interpreting the descriptive plot in Figure 8, the moderate-high-risk activities had significantly reduced the SDRRi (\(p=0.037\)) and CV of HR (\(p=0.032\)). There were significant differences between the low and moderate-high-risk tasks in HR, its maximum, range, RHR range, and CVL range (\(p\in[0.004;0.042]\)).