I've read that body adjusts its metabolism to the weight it considers normal. So if you were heavier for a long time that is the weight your body considers normal and would strive to maintain. I think it takes 5 or 7 years to re-educate your body.
Weight check every week and don't relax! It is harder to loose than regain. It is depressing but I am coming to this conclusion. If you are having a treat meal, have a treat meal or a treat snack, not a treat day. Don't have diet food and normal food, have superstar food that you eat all the time. Keep your maintaining exercise routine at 60% of your weight loss routine.
I worked hard to losse my wieght and went from a 14/16 to a 10/12. After just a few months of relaxing; not dieting etc I am now a 12/14. It's creeping back. And the thing I hate most? BACK FAT! Yuck! I am going to diet before Christmas then have a break over the holidays for a couple of days but honestly; I feel minging. Why is maintaining wieght so hard? I juts got bored with salad and working out all the time but I love the results.