I often find that after riding a lot, my body wants to store extra water. I get frustrated that the weight is not coming off like it should. Then a few days later, I see it coming off without doing anything different. I can gain and lose 3-6 pounds per day just in water weight. Perhaps the amount of fluids has something to do with it?

I guess the key is to keep at it, continue to get in better shape, watch what you are eating, and you will see results. (never fun though)