2 weeks in and low energy

I'd guess it's because you aren't eating enough to stay healthy and your body is responding by slowing down and tryiing to conserve energy. Most people can lose weight on much more than 1200 cals - it might take longer but you will fell sooooo much better.
And yes, eat those calories you are burning from exercise - your body needs them!

i'd agree with the first 3 replies. Your not eaing enough, 1200 is low for anyonne. Eat back your burnt calories and a couple hundred more and you'll be just fine. Dont despair.

You have no energy because you are hungry as hell! EAT, EAT, exercise, then EAT AGAIN!!! I've been to the 1200 calorie party and I'm never going again. If I tried to do 1200 calories a day with my current activity, I might pass out.

My trainer told me that she finds most people say they don't have much energy the first few weeks into a training program. It could be that or it could be what you're eating. Are you getting enough carbs and protein? Tweaking you're diet may be just what you need!

yup, I agree with everybody else....wayyyyy to low. You do not want to pass out if you are working out. Your body needs the fuel to move.

MFP gave me 1200 calories also and I fill the same way. I try and get as close as possible to 1200 but when I excersie I gain about 400-500 back so that 1600 calories and sometimes I cant always get to that. By the end of the day I just want to go to bed I fill so drained. Wonder what the reasoning is. I have TONS of protein in my diet everyday.

Protein is fine, but you need ENERGY and that means calories (wherever they come from - protein, carbs, fat).
Same advice for you - if you are low on energy and low on calories - add calories!

Low energy is a sign that something isn't right. I've tried a lot of different "eating plans" over the years. And whenever I made a diet change that resulted in low energy...waiting NEVER fixed the problem. If you have low energy, something is amiss. You probably need either more fuel or a different kind of fuel.

More Fuel: IMO, 1200 is too low for more folks than not. Its a pet peeve of mine that MFP seems to tell all sorts of women to eat 1200 calories. I've never done 1200 calories and I'm 4'11. Experiment with eating more. You don't have to go crazy.

Different Fuel: Sometimes when we make a diet change, we aren't use to 'cleaner' eating, and make mistakes in what we need. Here's an example of a common mistake...maybe you ate 70% of your calories from refined carbs before trying to lose weight...you still got plenty of protein and fat because you were eating a lot more calories...say 2700. If you cut down to 1600 calories but are still eating 70% refined carbs, you're probably a little low in something else, like protein...and vitamins. See how that works? Try eating more of...whatever you think you might be missing. Its often protein.

since there is no such thing as 'starvation mode'..its a myth.

anyways..since that, it could just anything really. You could try eating more. But I've done this before too. Its just one of those things. Our bodies are dynamic things. It changes and sometimes even when we havent changed any habits. I had low energy for about a month once over the summer. I got blood work done and everything was fine. I was eating 1800 cals at the time and doing no cardio, only lifting. One day literally I just started having energy again.

If you really feel lethargic, I'd suggest a visit for a checkup to your doctor. Feeling worn down and tired could be caused by anything, from yes not eating enough, to abdnormal body chemistry, to depression, or just plain not getting enough sleep.

maybe try taking vitamins or vitamin shakes