Farmers often have to do repetitive and monotonous
tasks, such as planting and harvesting, or sorting and
packaging agricultural products. Repetition of the same
monotonous tasks and a lack of variety cause boredom
and fatigue. When doing one job repetitively, only the
same group of muscles is used, and the same work
posture continues. This results in local muscular fatigue,
pains, or even injuries. Work efficiency will be lowered.
Frequent changes in tasks are therefore needed.