there is some sort of electrical signal that goes through your feet if you are standing barefoot on the metal plate (lots of home scales now have this feature along with a fat percentage monitor). If you had on shoes or even just socks, then I doubt it was very accurate. I'm not sure how accurate it is, even in barefeet, mine is always with .1 or .2 of the same percent for water, no matter how much I've had to drink.
Personally, I'd say that if you are peeing every couple of hours and it's not too dark, you are hydrated.
|