Originally Posted by Carbonfiberboy

https://tanita.eu/body-composition-scales/

Water content changes muscle conductivity. My muscle percent between when I get up and later in the day goes up 1 or 2 percent. Similarly after exercise and my thighs are still pumped, it also goes up. However if I don't recover the lost glycogen, the next mourning my muscle percent number will have gone down 1 or 2 percent from the previous morning as well as my weight dropping 1 - 1.5 lbs.. I doubt that's from dehydration since I pee a few times in the night no matter what. OTOH if I do recover the glycogen, neither my morning weight nor muscle percent will have changed. It helps to have paid attention to one of these scales for many years. Whether that's glycogen being measured or simply the water content of the glycogen really doesn't matter. It does get measured.