I know there's an assumption in the question but here's the situation. I'm on a lifting program I really enjoy, based on 3x/week compound barbell movements with progressive overload.
I know you have to eat, sleep and drink enough fluids to recover but it seems impossible to get all the water my muscles want. I always have to pee during the middle of the night. If I don't get enough water, after even a moderately intense workout which otherwise doesn't give me problems, I'm likely to get a migraine type headache onset in the morning lasting all day. I'm sure it's thirst related and my muscles are sucking up water, but when I pee, it is clear.
That is telling me it is not urea, correct? I also don't get intense thirst during or immediately after a workout. It is usually by the evening and especially night and morning so I assume it relates to muscle building (synthesis) and their need for it. Again it feels the muscles are sucking water from everywhere, but I feel it in my mouth, my throat and my head.
So my question is this. If the water I drink gets quickly eliminated, not kept, that makes me think it's being used for waste elimination ahead of local storage and if it's clear, then it's not urea, so I was wondering what waste product that would be associated with muscle synthesis or recovery? Then I can Google and learn more about it.
Or perhaps the water is just not getting into the muscles, being filtered first. If not, why not and what can I do?