I don't believe you are eating enough to fuel your metabolism. At that level I would guess you aren't even meeting your protein needs, which will lead to muscle loss (not good). I recommend an honest sit down with your nutritionist to evaluate, and tweak, your intake. It's not easy to hear that you aren't eating enough, when you've been obese for so long (in my case) and can lead to a "free for all". This increase needs to be controlled, to prevent spikes in cravings for junk. Best of luck!

I'm 10 months out and between 1200-1400 cals per day, and doing hour long workouts 4-5x/wk. I stalled the first 5 weeks of working out, I suspect as my body adjusted and I started to build muscle and lose fat. Now I'm losing again, and feel really good.

I posted this article yesterday in another thread, but will leave it here for you. It is a bit technical, but gives the formulas for calculating needed carbs, protein, etc for active bariatric patients. http://bariatrictimes.com/nutritional-management-of-the-bariatric-athlete/

I was told not to exceed 800 calories per day until I got to my goal weight. I'm there now and it was tough. I had to preplan every bite that went into my mount. On the days I went over I exercised off the surplus calories. I also thought it was too few calories but I will have to admit the dietitian was right. I'm at my goal weight. 800 calories per day will make you choose very carefully what you eat. I basically ate protein, veggies, and a little fruit. I made up any differences in protein with a protein shake. It took me 1 year and 2 days to get to my goal weight. It's tough but doable.

There seems to be a lot of conflicting info out there depending on who your surgeon and NUT are. How far out from surgery are you? If you've been stalled for a while at 800 calories, I would try upping to 1000 for a day or two and just see what happens. You aren't going to derail yourself in 2 days. Everyone's baseline is different. When I saw my surgeon at 8 weeks and complained about my stalls, he said you need to trick your body every once in a while - up your calories, change up your exercise routine, etc. I was being really strict in the 700 - 900 calorie range and found when I upped my calories to 1000 - 1100, I would break my stall. Same thing happened a few days ago, I was stalled for a week and then had a high cal day of 1300 and the day after, the scale moved down again. Just reinforces the idea that everyone's caloric needs are different - your body may need more than others to function optimally. This article was really helpful in explaining how losing weight is not just about cutting calories and increasing exercise cnn.com/2016/01/28/health/weight-loss-exercise-plateau/index.html