Ever since I started running, all I know is that I need to drink a sh*t ton of electrolytes. But I would like to understand why on a physiological level.
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Additionally to the electrolytic balance mentioned in other comments, consider that the only way your body retains water and regulates blood volume is by binding it to certain electrolytes, like sodium and potassium. If you’re deficient in those, there are many negative effects.
Specifically when discussing hydration, there are sodium-deficient people who are chronically dehydrated, regardless of how much water they consume. They just pee too much of it out, and their body retains too little. High-sodium diets and electrolyte drinks are normal when trying to correct for deficiencies like that.
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