I weigh myself every day because I am collecting data on my weight trends. I weight under the same conditions, the same time of the day. I fluctuate within about a three pound range. During the day I have even greater variability. I may weigh 103.5 first thing in the morning and 107 in the afternoon. My weight will go up after a lot of exercise, but then come down a day or two later.
I am post menopause so those issues no longer apply to me.
Here is a graft of my weight at maintenance, look at how jumpy it is:

(apologies if the graph disappears, I have problems pasting it here)
Last edited by goldfinch; 05-16-2012 at 04:41 PM.
Trek Madone 4.7 WSD
Cannondale Quick4
1969 Schwinn Collegiate, original owner
Terry Classic
Richard Feynman: “The first principle is that you must not fool yourself and you are the easiest person to fool.”