How tall are you? how old are you? And eat a big meal in the morning or atleast something big anf healthy that gets your metabolism kicking first thing in the morning. Just also no eating fast food and try eating healthier. summer is here so swim. get active.

I'm 5'2" and 15 (16 in less than a month).

I don't ever eat fast food. Most of my meals consist of fruits and the occasional vegetable, and the rest is either stuff like yogurt, granola bars, cereal or a lean cuisine. But all together I'm eating about 670 calories a day, which is becoming hard to keep at.

I know that I have to get active but what other than swimming can I do? Today I ran/jogged 20 laps around my house (goes in a loop) and did 100 jumping jacks.. so far I've eaten about 600 calories. I can't do the running/jogging around my house every day- in fact, I'll only have that opportunity for two more days (Tuesday and Wednesday of next week). But I can't go outside either... maybe I can go swimming once in a while but that's it.

i used to restrict my calories excessively, and im about your height and age. when i realized that i ate too little for my body to consistently maintain itself, i upped my caloric intake by 100 - 200 every three or four days, though maybe more days because youve been on this caloric restriction for a while. i wouldn't up it with junk food or anything, though, more like veggies and fruits. remember that anything below 1200 is considered a great calorie deficiency.

i know that eating a bigger breakfast in the morning helps to jumpstart your metabolism, as well as exercising before you eat, or eating after you exercise. drinking green tea is supposed to help, too, as i used to drink that in the morning. also, instead of trying to jam a whole workout session in one sitting, try spreading it out so you move more often throughout the day time-span wise? im not sure what else to say..

You can easily boost your metabolism by eating more. I have no idea where you got the idea to restrict yourself to 670 calories a day, but that is the worst thing you could have done. For one thing it is unhealthy. For another it will make your metabolism slow down significantly.

When you eat the appropriate amount, your body takes it in and burns it off. When you eat too much or don't burn enough calories, your body stores the extra as fat. When you take in too few calories, which is what you have done, your metabolism almost shuts down. Basically, your body goes into starvation mode. It does not understand why it is not getting enough food, so it assumes you are having hard times and food is scarce. Your metabolism slows down because your body does not know when it is going to get food again. So rather than letting you easily burn away the calories, it holds onto them for dear life. If you go without enough food for long enough, your body will have no choice but to burn some calories, burn some stored fat, and take nutrients from your internal organs. Your body can actually begin to eat itself in a last attempt at survival.

The only way to get your metabolism back to normal is to eat again. Hopefully you have not been doing the starvation diet long enough to cause irreversible problems. You need to realize that you're not huge. Wanting to be healthy and in shape is fine, but wanting to lose weight that you do not really need to lose is silly and can be extremely dangerous. If you lose a bit, that is fine, but don't go overboard.

Eating small meals often will help keep your metabolism going. It kind of reassures your body that things are ok, food is not scarce, and that burning calories would not be a dangerous thing to do. Instead of eating three large meals like people used to do, it is now recommended that you eat about six smaller, healthier meals. You need to make sure you are meeting all of your daily requirements in the process.

The exercises that you are doing now sound like plenty to keep you healthy. If you are eating healthy and exercising an appropriate amount, but still feel the need to do more and lose more weight, you could try talking to a therapist about eating disorders.

I actually eat about 5 meals a day, 4 of which are really small and tend to range anywhere from 40-100 calories. My only "big" meal is dinner, which is usually something like a Lean Cuisine (can be from 220-320 calories or so) a cup of 10 calorie, fat-free and sugar-free Jell-O. The rest of my "meals" are usually something like a yogurt, a granola bar, raw mushrooms or apples/strawberries/a banana. Never in my life, however, have I eaten much meat; I never liked it that much, nor have I ever liked eggs or seafood of any kind.

Weight-wise, I don't even feel the need to be as low as even 100 pounds or even 110--I just want to get rid of my belly. Seriously, as long as my stomach is flat, I'll be happy. But right now, even with my calorie restriction, it's not going so well. I'd imagine it would take me a LONG time to get rid of my belly. It just bothers me so incredibly much.

As for exercise, lately I've been slowly weeding out my 100-situps routine because I don't think it's been doing all that much. I do them before bed anyway, so it's not like I eat anything afterwards. Do you think quitting the situps is a bad idea? I mean, as long as I keep up with 200-400 jumping jacks a day and walking my dog every other day?

Ok, that's great that you are already eating the small meals often and that you do not have unrealistic weight expectations. Be aware that most women have a bit of a tummy. A lot of the ones who don't have a personal trainer. So make sure you are not going overboard there.

I think it would be all right if you stop the sit-ups. It sounds like you do enough other stuff to burn a decent amount of calories anyway. Also, I have heard that sit-ups actually make some people have even more of a stomach since it builds the stomach muscles up.

You are not eating enough, and if you continue eating that way, you will wreck your metabolism and give yourself a serious eating disorder.

It is very, very dangerous to consistently eat fewer than 1200 calories/day. Even 1200 calories for weight loss is low, in my opinion; 1400-1500 calories with diet and exercise should accomplish weight loss in most people. If you don't exercise, you should be able to eat 1200 calories a day and still lose weight.

You are literally starving yourself, and you will do serious damage if you don't stop it. Your "meals" and "snacks" are exactly similar to what I was eating when my anorexia was very, very severe. The "meals" you are eating are not real meals. Lean Cuisine has way too few calories to be considered an actual meal and is more like a snack. At my worst, I weighed 80 lb. and I'm 5'4". That is a diet that will kill you. My potassium started getting low, my heart hurt all the time, my periods stopped, and I was dizzy and weak. You need to eat more! It also sounds like you are not getting enough protein--if you don't like meat, add peanut butter, nuts, beans, cheese for protein. Protein is very, very important for your body!

If you want to lose weight, do it sensibly. Now, I don't know how long you have been eating this way, but initially, when you up your calories you may have weight gain and bloating, but it will go away once your body is convinced that you are no longer starving it. Depending on how long you've kept up this behavior, it may be a week, a month, or 2 months or 6 months for your metabolism to pick back up. Probably not 6 months though, that was what it took for me, but I was starving myself for 5 years.

Look into a sensible diet like South Beach or weight watchers. They sell books on the South Beach diet in the used bookstore; and there's info online, it's not hard to find. Also start exercising--buy a couple of aerobic DVDs; that's exercise you can do indoors. There's also a series called Walk away the Pounds--it's walking DVDs with some steps and arm stuff added in that isn't too complicated to do and you can do it indoors.

Please be careful! You don't want to do to yourself what I did to my body.

I have been eating this way for about 2 months now; how long might you say it would take for my metabolism to return to normal since that's the case?

Also, how much weight am I subject to gain after returning to normal eating habits, at least, at first? Like I said, I'm sure that right now I'm somewhere in the 130s--no where near underweight, and I don't believe that I'm even at the average weight for a 15-year-old teenage girl of my height, either.

One more thing: at my current state, would it be okay to slip up and eat something like pizza once in a while? Say, once a month, with my metabolism as low as it is now? I worry that if I eat even a very small amount, like one slice after not eating pizza for two months, I'll gain weight instantly...

I have always found the best way to boost metabilism and to give yourself a lift is to get eh house or just a room to yourself, pop on some music and dance! I always feel daft at first and even if I don't feel like doing it i know that once the adreneline starts flowing, I feel on cloud nine. Not only am I toming up the excess skin and fat but it makes me feel great inside too!!

Well, dance a little at home, if you can't go outdoors. If you can go outdoors, just go for a walk for half an hour or so. Go up and down stairs, move yourself.
And don't count calories...