Yep, age does it to you. I too, lost all my baby weight within a few weeks, but I didn't start at my ideal weight. And since then, I've gained 10 more lbs.

I started a new blog called Re-Vamp to document my attempt to get back to where I need to be. I figure if I do it publicly, I'll be forced to keep at it. In my own private world it'd be too easy to fall off the wagon!
