[m463]

Could it be that people who sweat have lower serum sodium?

I wonder if it's possible to lower the value not only by adding water, but by sweating out the sodium?

People who exercise or use saunas have much lower mortality rates.

Of course, maybe they have to hydrate, as they remove sodium through their sweat and their body might accentuate their sense of thirst.

additionally, people's sense of thirst is decreased as they get older.