Yikes! I'm Gaining My Weight Back Fast!

You can probably consider some (maybe even half) of that as water weight - due to sodium, glycogen refilling etc.

Totally possible if you went back to eating the way you were when you weighed 320.

So many possible reasons, so little information to go on.

For what it's worth, I ate total crap yesterday...and lots of it. According to my scale, I "gained" 6-8 lbs in one day. I know this isn't the case, and is in reality a complete impossibility...but that's what the scales says today anyway. Tomorrow it will sing a different tune, and by the end of the weekend, I'll be back to my "normal" weight.

Too many factors to give any accurate advice. However, go back to logging and make sure you're correct in the amount of calories you think your eating at maintenance. IF it worked for you in the past, then do that now.

This is just some general advice, not necessarily tailored at you but very helpful for people who have lost weight and worried abour regain:

Never stop logging - even after you reach goal. You should be able to eyeball a food and know the number of calories it has, and taper your diet so you are hitting just below maintenance.

Start now - not next week, not tomorrow, now.

Log. Measure. Eat 500 under your suggested maintenance. Avoid the heavier junk foods. Add in weight training if you have not already done so - shifting your body composition to more muscle / less fat will make weight loss manageable.

I can't say this enough, if we are genetically prone to being overweight or overeating it may require long term calorie counting to maintain a weight loss, until you can get a hang of it and maintain it indefinitely. If we indulge all of our food impulses at any given time, it won't work.

There is no "off the diet" option. There is just a lifestyle. Moderation works but only if you do it every day.

95% of people who lose a lot of weight gain it back in 5 years.
You have to work very hard to avoid regaining. After being in a deficit for so long, your body is probably trying to put on weight.

How much were you eating when you lost the weight?

I was eating WAY too little (1200) to lost my first 50lbs and gained it back quickly. Eating 1900 plus exercise calories now and it is working much better!

i used to count my calorie intake but it doesnt really help me at all cos im really specific that even 1 calorie should be counted. thus i calculate my output and input so much that i didnt realise its just like going to gym and eating a big mac after... i suffer from OCD and binge eating disorder plus i have this friggin hypothyroidism. my friend eventually suggested a pill she takes and i thought it was bogus at first... but it worked for me. i never wanna count calories again. im too fussy with things now i dont want to be fussy with calorie numbers hahaha i also gain my weight back fast but not anymore. its really depressing before everytime i stood on the scales. -_____-

I am close to my goal weight and plan to continue logging everything after I've reached it. My primary reason for this is that it keeps me on track for ensuring I am getting enough of the macro and micro nutrients I need. It is also helpful to track my daily and weekly calories intake, of course.

I think the visual accountability will keep me from slipping by the wayside, which I tend to do when my work is too busy and I feel I have no time to do good things for me. MFP diaries keep me aware of what I need to do to take care of me and have more balance in my life.