I'm not at all convinced. I was in peak physical condition while training for mountain races this year, and I still experienced the same stress and anxiety everyone else did.

There's no scientific evidence that drinking extra water when you're not thirsty has any health benefits.

There are other things that dehydration manifests itself as beside just being thirsty though.

Lightheadedness is a big one for me.

I definitely notice a positive difference when I drink more water than coffee but the core problems causing burnout are still there and unresolved. It's a boost not a fix.