One of the measures is fluid replacement
Cool water or liquid should be placed close to the work area, and workers
should be encouraged to drink small amounts frequently.
In some cases, drinks containing salt is recommended to
prevent heat cramp caused by hyponatremia. In this research,
cool water was made available to workers at places close to
the work area. This may be the reason why serum osmotic
pressures were within the normal range. The voluntary water
intake may have been effective to prevent dehydration,
although two subjects showed high serum osmotic pressure
after work. One showed high serum osmotic pressure before
work. It is also important to drink water before feeling thirsty
at the beginning of work.