Hyponatremia

Hyponatremia is the medical name for low blood sodium. MedlinePlus defines it as a condition in which the sodium level in the blood is lower than normal. Heavy sweating is one listed cause on that page.

On a jobsite, the risk grows when a worker sweats for hours and drinks large amounts of plain water. Water alone does not replace sodium. NIOSH says fluid intake should generally not exceed 6 cups per hour. Read our hyponatremia at work guide and the electrolytes 101 guide. Balanced electrolytes matter on long shifts.