with Dr James DiNicolantonio

And to give you an example, the average loss of salt in sweat is going to be a full half a teaspoon of salt per hour of exercise.

And if you're exercising in the heat, you can lose over a full teaspoon per hour of exercise.

So, if exercise is healthy for us, and that activity causes us to lose salt, we should make sure to replace the salt that's being lost.