What bluu said

I couldnt find the exact link I was reading last week, but I did find this Sports Medicine - Sodium Needs for Athletes Other than people with psychological impairments, babies (due to their size and the size of their kidneys) and endurance athletes, Hyponatremia isnt usually a problem for most of us (There are cases where it becomes so, e.g. adverse reactions to some drugs) as our diets are quite high in sodium.

Nat