losing weight, is a negative calorie intake what i need?

What you need is to eat a decent mix of carbs, protein, and fat, and get to at least 1200 calories. If you're working out a couple hours/day, you need to eat more. What you're doing is not sustainable and will make you feel horrible.

800 calories, sounds like dinner.

this just proves why more girls need to play sports. it's the best way to learn to feed your body for the results you want.

and yeah what the others said, you need to be eating more

When I started MFP I also had this problem where I couldn't even eat 1200 because of the drastic change in diet left me with foods that are low in calories but physically quite massive (mainly vegetables). As time went on, however, I found myself branching out of my strict routine and started eating "normal" "non-diet" foods in moderation, which then allowed me to start meeting the 1200 calorie goal. I recently bumped it up to 1500 calories (and I often go over by 100 or so) and have been losing the weight at a steady, similar rate as before. My point is: Don't be afraid. You were eating probably twice as many calories at some point to gain weight so those 400 calories aren't likely going to make a huge difference in your overall progress. Just try to stay positive and keep to it, and if you ARE hungry, eat what you want in moderation and don't deny yourself food when you feel you need it... especially if you work out. When you feel that 1200 isn't enough, bump it up. The extra 300-400 calories you'll be eating a day will keep you satisfied and keep you sticking to the plan longer... and you'll still be losing weight.

I always wonder how someone that is "trying to lose weight" can't eat calories in a day? How did you do it before you started trying to lose weight? Doesn't make sense; exercise or not - actually exercise should make you more hungry.

there's a reason my fitness pal gives you a red warning when you're under 1200, no you won't immediately go into starvation mode but your weekly average should be at 1200 or above calories. if you're "not hungry" or "can't eat all your calories" one day and are at 800-900, make sure you eat more the next day to average out to a healthy weekly caloric intake.

there are healthy ways to reach your caloric intake goal. try adding a protein supplement to your breakfast, it's not too "filling" so if your issue REALLY is that you're too full to eat, that's a healthy option to take in calories or nutrients.

try adding bars - such as Kind bars (or another low sugar, high nutrition) meal bars as a snack. they are a healthy option that are small, so they won't take up too much room in your stomach.

i'm not sure how long you've been at this whole 800 calorie a day thing - but eventually, it will backfire. if you've been at it long enough then that's your problem there, you're so low-energy from lack of nutrition that you are not hungry.

Okay ill definitely start to eat more calories. Didnt realise it was this bad! Thank you. Also how many calories should I burn if I eat 1200 calories a day to still lose weight?

you should net 1200 calories. aka if you eat 1200 and burn 300 exercising, you should eat the 300 back to equal 1200. exercising = more leeway to eat.

i hope i am not wasting my time if you're not being serious with these questions, but try reading up on the forums for some of the starter guides. aka "in place of a roadmap." or talk to you doctor, but you really need to get at least slightly educated about calories and nutrition before diving into a long-term diet weight loss plan. learning how your body works will set the foundation for a healthy continuing lifestyle - not a crash diet doomed for failure eventually.

800 calories, sounds like dinner.

LOL...thnx I needed a good laugh:)

My bmr says I need to eat 1420 a day so how much should I eat and burn?

Usually 300-500 Calories under your Maintence Level of Calories is the General Rule i go by. It depends if you work out, run, ect...

Then it may be more if thats the case.