Yes. Once you wake up and start eating and drinking, that will add to your weight over the course of the day. Water retention and so on. The best way to weigh yourself, and to get the most accurate number possible is: Wake up in the morning. Use the restroom (whatever you have to do. Empty your bowels if possible) and then weigh yourself. I think a decent way to go about it is weigh yourself on a Mon, and then do it again on Fri. If you're doing a Mon,Wed,Fri routine and or cardio in between. Just my thoughts. To each their own