Yeah, those last 10-15 pounds are some hard ones to get rid of! Trust me, I feel your pain.
You need to further reduce your calories (no going under 1,200 though) and when that stops working, start to increse them, reduce them, increase, reduce, and switch up your exercise routine. Try incorporating new activities and upping the intensity/duration.
You'll lose 'em, you just have to be patient. What you also have to remember is that your body composition is just as important as your weight if not much more so. If you're going down in fat, that is just as big of an accomplishment as going down in pounds would be.

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