Just starting to eat more... Reset necessary?

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Hello,
I am new here and am learning so much reading all the past posts. I have been an avid weight watchers follower/point counter for years, but ive gained a few pounds i cant seem to lose. I work out hard 6x week (HRM reads between 600 and 750 burned each day) and ive come realize that i am not eating enough to sustain those workouts, nor lose weight. I logged all my points eaten into MFP and it came up 1200 which is way too low, especially on a day ive worked out!
My question is, if i begin to eat more calories, is it necessary to do an official metabolism reset that ive read about? What are the benefits of doing one?
Any suggestions in favor of it or against are appreciated!
Thanks!
Chris

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