Starvation Mode?

Yea ide say you're starving.. I'm 5'3 166 active all day every day i eat 1600 and sometimesi don't eat enuff. . So just for over all health, ide start eating double what u do.

I agree with the others, you need to eat more and considering that you're vegetarian, you have the option to eat much more in volume then the rest of us omnivores so please do it.

Many years ago, I was in a similiar situation as you, droped 70 lbs in about 5 months, but my reward from that was always being hungry, under-eating, occasional fainting and a long evening in the ER. Not worth it.

You need to have a realistic eating schedule, even if you're exercising more or not. It's not like there is an end date where you can stop and that weight will be you the rest of your life. Know your body and know yourself.

is this a joke?

This. It is very hard to gain weight at 700-900 calories IMO starvation mode or no.

is this a joke?

Joke, or maybe a mistake.

I just tried the bmr calculator using 5' 6, 28 yo female and tried 40 kg, which gave a result of 1100 cals a day.

So, the OP is either mistaken, dead, less than 40kg or pulling our legs.

There was an article floating around on here that a doctor or a dietitian wrote about a woman who only ate 700 calories a day and was frustrated because she was still overweight, I think she was over 200 pounds, basically the doctor/dietitian explained that, because your body burns over 2000 calories a day just by say you were to do absolutely nothing but wake up eat, lay on the couch all day, then go back to sleep etc. and you go and only eat 700 calories, so because of this your body isn't getting enough fuel to at least maintain those basic functions, so the body then goes into starvation mode, so when it does that what happens is, it slows everything down in your body, your metabolism etc and so that slows and essentially stops all fat burning, no matter how much exercise you do and it starts storing fat instead, so whatever amount of fat you consume, no matter how small, your body holds unto that fat and stores it in order to protect your body. Your body basically slows your metabolism down, that way your body is running at minimum capacity so your systems don't shut down all together, for example your heart, liver, kidneys, etc from lack of nourishment.

You say what you've been eating is "healthy". You're eating half or less of what you need to function...eventually something was going to go wacky and it seems it did. Please consult a nutitionist....this sounds like riding the ragged edge of an eating disorder.

you can't gain weight when eating in a deficit..unless you have somehow found a way to defy the basic laws of physics and math ...

Also, true starvation mode is eating nothing for 72 hours...so you are not in starvation mode...

However, you probably have jacked up your metabolism by eating so few cals and working out so much...

Even if they have messed up their metabolism with the hormonal issues caused from a long-term very calorie-restricted diet, AND if they also suffered hypothyroidism ... they'd still likely never gain weight on 700-900 calories.

After reading the OP's profile, I can say I am in no way qualified to offer any advice. In fact, I doubt there are many here that can.

You're not accurately logging

Honestly i would say that it is very likely that it is starvation mode. I went through a similar experience. Typically a normal weight for someone of your height should be around 130 pounds, and since you work out frequently, i would say to sustain a healthy weight you should be taking in 1900-2000 calories. Starvation mode is initiated when your caloric intake is or at least half of what your daily recommended amount of calories is per day. And for those in disbelief it is likely, for someone to eat too few of calories and work out, to gain weight because the body's metabolism slows so much- it wants to make sure there is enough energy to sustain functionality until the next meal.
So, in conclusion, keep up the exercise and slowly increase your calorie intake (make sure its healthy calories, not fatty calories) and you should be good to go.

There was an article floating around on here that a doctor or a dietitian wrote about a woman who only ate 700 calories a day and was frustrated because she was still overweight, I think she was over 200 pounds, basically the doctor/dietitian explained that, because your body burns over 2000 calories a day just by say you were to do absolutely nothing but wake up eat, lay on the couch all day, then go back to sleep etc. and you go and only eat 700 calories, so because of this your body isn't getting enough fuel to at least maintain those basic functions, so the body then goes into starvation mode, so when it does that what happens is, it slows everything down in your body, your metabolism etc and so that slows and essentially stops all fat burning, no matter how much exercise you do and it starts storing fat instead, so whatever amount of fat you consume, no matter how small, your body holds unto that fat and stores it in order to protect your body. Your body basically slows your metabolism down, that way your body is running at minimum capacity so your systems don't shut down all together, for example your heart, liver, kidneys, etc from lack of nourishment.

Ow ow ow ow

Ice cream headache from reading that..

You didn't have to read it as simple as that, or for that matter comment on it!!!

this is a good read:

http://www.fitcorefitness.com/wp-content/uploads/2011/12/Caloric-Restriction.pdf

Doesn't necessarily answer your question, but it does explain a lot of the studies about reduced calorie diets...

I especially note the studies that show that RMR drops in response to some levels of caloric restriction - so if your RMR is 500...then you are eating at a surplus even though you think you are not...sounds possible to me, but I am not a doctor.

is this a joke?

This. It is very hard to gain weight at 700-900 calories IMO starvation mode or no.

Agreed. Go to a doctor. This doesn't sound like starvation mode.

Honestly i would say that it is very likely that it is starvation mode. I went through a similar experience. Typically a normal weight for someone of your height should be around 130 pounds, and since you work out frequently, i would say to sustain a healthy weight you should be taking in 1900-2000 calories. Starvation mode is initiated when your caloric intake is or at least half of what your daily recommended amount of calories is per day. And for those in disbelief it is likely, for someone to eat too few of calories and work out, to gain weight because the body's metabolism slows so much- it wants to make sure there is enough energy to sustain functionality until the next meal.
So, in conclusion, keep up the exercise and slowly increase your calorie intake (make sure its healthy calories, not fatty calories) and you should be good to go.

No, no, no......there is one smidge of truth in here and a truck load of nonsense.

Looking at your profile and what you've posted here, I think you are better off seeking the help of dietitian and someone who can assist you with your history of eating issues (which appear to still be in existence) and not MFP.

I wish you luck & I hope you get the help you need. Take care of your body/mind and love yourself.

Amen.