What if I'm not eating enough calories while working out?

How do I know how much to eat if I don't know how many calories are in some of the foods I eat. I have been really good about eating my breakfast in the morning to get my matabolism going. I'm finding as I work out more that I'm not wanting to eat as much during the day and evening? Some days I will only get maybe a 1000 calories and on top of that I will have done a good 30 minutes on the treadmill in the morning. The next day I may have 1500 and then I may be back to a couple days of 1000. I don't really count my calories because I make alot of things that I have no clue how it would calculate into portions and calories.
I have around 50 lbs to loose. Do I have enough to loose that I don't have to worry about my body burning muscle before it will burn the fat?

I just remember someone was doing weight watchers and not eating all her points and she was not loosing weight. The WW lady to her she needed to eat all her points.
Then I remember on biggest looser how she would say, "you have to eat" if your going to loose weight."

Sat. Jul 29, 5:26pm

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