## 4 Discussion
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Activities**} & \multirow{2}{*}{**Main Tasks**} & \multicolumn{3}{c}{**Estimation of Metabolic**} & \multirow{2}{*}{**Level**} \\ \cline{3-3} \cline{5-6}  & & **Energy Expenditure** & & & \\ \cline{3-6}  & & **MET** & **J/s** & **kcal/min** & \\ \hline \multicolumn{6}{c}{**Average:**} & **6.1** & **530.3** & **7.6** & **Moderate** \\ \hline \multirow{6}{*}{**Wine Storage/Conservation in**} & Cleaning/preparation of stainless-steel & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & vats (Manual handling of loads) & & & & \\ \cline{3-6}  & Transfer operations: handling of transfer & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\ \cline{3-6}  & pumps, hoses, and connections (manual handling of loads) & & & & \\ \cline{3-6}  & Superior access to the vats (unlevelled & \multirow{2}{*}{5.8} & \multirow{2}{*}{509.4} & \multirow{2}{*}{7.3} & \multirow{2}{*}{Moderate} \\  & work—going up and down stairs) & & & & \\ \cline{3-6}  & Moderate work in a standing position & 3.5 & 307.0 & 4.4 & Light \\ \hline \multicolumn{6}{c}{**Average:**} & **6.3** & **551.3** & **7.9** & **Moderate** \\ \hline \multirow{6}{*}{**Wine Heating (Madeira Wine Production)**} & Cleaning/preparation of stainless-steel & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & vats (manual handling of loads) & & & & \\ \cline{3-6}  & Transfer operations: handling of transfer & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & pumps, hoses and connections (Manual handling of loads) & & & & \\ \cline{3-6}  & Superior access to the vats (unlevelled & \multirow{2}{*}{5.8} & \multirow{2}{*}{509.4} & \multirow{2}{*}{7.3} & \multirow{2}{*}{Moderate} \\  & work—going up and down stairs) & & & & \\ \cline{3-6}  & Maintenance/checking of piping for water & \multirow{2}{*}{3} & \multirow{2}{*}{265.2} & \multirow{2}{*}{3.8} & \multirow{2}{*}{Light} \\  & circulation for heating (manual handling of loads) & & & & \\ \cline{3-6}  & Maintenance/checking of heating boilers & \multirow{2}{*}{3} & \multirow{2}{*}{265.2} & \multirow{2}{*}{3.8} & \multirow{2}{*}{Light} \\  & (manual handling of loads) & & & & \\ \cline{3-6}  & Moderate work in a standing position & 3.5 & 307.0 & 4.4 & Light \\ \hline \multicolumn{6}{c}{**Average:**} & **5.2** & **460.5** & **6.6** & **Moderate** \\ \hline \multirow{6}{*}{**Batches Preparation (Blending)**} & Cleaning/preparation of stainless-steel & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & vats (manual handling of loads) & & & & \\ \cline{3-6}  & Transfer operations: handling of transfer & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & pumps, hoses, and connections (manual handling of loads) & & & & \\ \cline{3-6}  & Superior access to the vats (unlevelled & \multirow{2}{*}{5.8} & \multirow{2}{*}{509.4} & \multirow{2}{*}{7.3} & \multirow{2}{*}{Moderate} \\  & work—going up and down stairs) & & & & \\ \cline{3-6}  & Moderate work in a standing position & 3.5 & 307.0 & 4.4 & Light \\ \hline \multicolumn{6}{c}{**Average:**} & **6.3** & **551.3** & **7.9** & **Moderate** \\ \hline \multirow{6}{*}{**Stabilization/ Clarification**} & Operate/control stabilization/clarification system & \multirow{2}{*}{2.5} & \multirow{2}{*}{216.3} & \multirow{2}{*}{3.1} & \multirow{2}{*}{Light} \\  & Transport of materials for & \multirow{2}{*}{8} & \multirow{2}{*}{697.8} & \multirow{2}{*}{10} & \multirow{2}{*}{Very Heavy} \\  & stabilization/clarification (manual handling of loads) & & & & \\ \cline{3-6}  & Forklift driving & \multirow{2}{*}{2.5} & \multirow{2}{*}{216.3} & \multirow{2}{*}{3.1} & \multirow{2}{*}{Light} \\ \cline{3-6}  & Superior access to the vats (unlevelled & \multirow{2}{*}{5.8} & \multirow{2}{*}{509.4} & \multirow{2}{*}{7.3} & \multirow{2}{*}{Moderate} \\  & work—going up and down stairs) & & & & \\ \cline{3-6}  & Moderate work in a standing position & 3.5 & 307.0 & 4.4 & Light \\ \hline \multicolumn{6}{c}{**Average:**} & **4.5** & **390.8** & **5.6** & **Moderate** \\ \hline \hline \end{tabular}
\end{table}