800-1000 calorie diet bad?

5 days? Are you doing weight assessment after 5 days?

You can weigh yourself every morning if you want but only assess your progress on a MONTHLY basis.

Like you could lose one quarter of an inch on your thigh after a month (even if you do not lose weight on the scale, just getting more muscle mass with weight training and getting toner) that would not be noticeable after a week.

Your Basal Metabolic Rate (BMR) is about 1,430 calories (19 years old, female, 5’4 and 130lbs).

You should eat enough calories to cover your BMR or your body will adapt to a low caloric intake and lower your metabolism, making it very hard for you to use your body fat. And then, as soon as you would eventually start eating normally again, you would make body fat very easily, because you would have a lower metabolism and therefore regain all the weight you lost and keep going up, unless you exercise A LOT. Also, as you’re younger than 21, you need to eat more when having a growth spurt so you don’t stunt your growth (you get ravenous).

Women’s BMR:

655 + (4.35 x weight in pounds) + (4.7 x height in inches) - minus (4.7 x age in years)

Each pound of body fat that you wish to lose is 3,500 calories of exercising, providing that you eat enough to cover your BMR...which you don’t.

Losing 4 pounds in 5 days is surely not exercising for 14,000 calories in 5 days, as that would be 2,800 calories of exercising a day... like 5 or 6 hours (if you’re at Club Med or in a summer sports camp) but then you would need to eat enough to cover your BMR (1,430) and your exercise (2,800) and eating more than 4,000 calories for a woman would require quite a bit of know how to pull it off (using high calories healthy fats). You cannot efficiently exercise for 2 hours a day while not eating for it (if you only eat enough to cover your BMR). If you eat under your BMR, you’ll get a hard time just getting enough energy to exercise at all.

I don’t get how you can be walking/jogging, swimming, and biking while not eating for it. You still need carbs for the first 20 minutes of aerobics until your body start using a percentage of fat reserves. You could not even last 2 hours and burn like 800 calories, at 12.5mph = 25 miles/32 calories per mile, let alone 2,800 calories.

Edit:

You used to eat over 2000 calories...that was too much as your BMR is 1,430 calories...unless you were very active which I doubt because you feel the need to diet and you weigh 130lbs.

How come that now you cannot stomach more than 1000 calories?

Healthy food will fill you up more than junk food but still, you should be able to eat enough to cover your BMR.

Just a post workout snack eating half an avocado with olive oil vinaigrette is about 280 calories (1 tbsp of olive oil is 120 calories and half a big avocado is about 160 calories). Add a serving of nuts and you get 400 calories.

Add olive oil to your salads (extra virgin) and cook with olive oil (extra light, which has the same calories but was refined to withstand higher cooking temperature above 375F but has less flavor). The word “light” does not mean “less calories” but “lighter in color”.

Women need one tbsp of olive oil a day, men need 2 tbsp.

If you’re full, that does not necessarily means “stop eating” The opposite is also true. You should not eat until you’re full as it takes about 20 minutes for your brain to get the message that your stomach if full, so know and eat your personal portion sizes.

You could have messed up body signals about hunger for numerous reasons. Some people get depressed and use comfort food and eat a lot and gain weight, others get depressed and lose their appetite and lose weight. Some people deprive themselves or eat fake sugar and then binge.

I’d say if you cannot stomach 1,000 calories, then you need to reestablish good hunger signals and cravings.

A female to function correctly need at least 2000 calories per day. It's not the calorie in take you have to worry about because if you eat 2000 calories every day your metabolism will burn 2000 calories. If you go on an 800-1000 calorie diet and then return to a 2000 calorie diet you will gain 1000 calories to your body which about half a pound. The thing you have to worry about is not how many calories you eat but what you eat. Eating 2000 calories of junk food is not the same of eating 2000 calories of eating fruits, vegatables, grains, or nuts. Also 5'4 and 130 lbs is the ideal weight for that height

Whoa slow down. First of all you are not heavy for your height not even a little. Most people after their teens and some before then have a little bit of fat around their bellies and it can be really really difficult to get rid of it. Not having that means being really low in body fat percent close to 10% which is hard to do. First of all eating 800-1000 calories a day is very unhealthy. You need to figure out what your recommended caloric intake is probably around 1800 maybe less. Now most people eat two or three big meals a day with maybe one or no snacks in between which slows your metabolism down. The other really bad thing to do is eat really little for a long time and then binge. What you want to do is eat three smaller meals per day accompanied by three snacks which will keep your metabolism most active. Make your snacks things like fruits or smoothies or protein drinks (yes even women need protein). You should be eating something every two to three hours. What happens when you wait longer than that or begin to feel really hungry is that your body goes into starvation mode and actually stores fat as appose to burning it. The other thing to do is make sure you drink plenty of water which will not only help your body absorb nutrients but will stop your body from retaining water because it thinks it is dehydrated. 6-8 cups a day is the recommended amount. More if you sweat a lot from exercise or what have you. On to exercising. Its great that you are already in a habit of doing it daily thats often the biggest step. However if you really want to burn fat the traditional jog or bike ride is pretty much useless. What you need to do is combine days of cardio with days of weighted exercises. Weights (body weight or external weight) build lean muscle which will help keep you toned and use up more of the calories that you intake (and no you arent going to ever bulk up so dont worry about that). Also abandon the idea of just strait jogging or biking, instead look into interval training. Basically alternating periods of high intensity with shorter periods of low intensity. So run fast for a while like 40 seconds then slow and rest for 20 and repeat. You can adjust as needed. Good luck! If you feel lost in the weight training area you can check out things like womens health magazine online which has a lot of good workouts or get a personal trainer for a day at a gym to have them show you good exercises to do for what you want to accomplish.

It's unhealthy for you.

Weight loss is a combination of good nutrition, calorie reduction, and exercising.

Reducing your caloric intake by 3500 calories = 1 pound weight loss

Formula for Success

1. Small Frequent Meals

Don't skip meals or go more than four hours without eating this set you up for later temptation. When meals are more than six hours apart, plan strategic snacks.

2. Eat Moderate Portions

Eat a little less of everything!

3. Beware of Concentrated Sugars

Excess sugar eaten alone causes more insulin secretion. Insulin promotes fat storage and can result in a rebound drop in blood sugar levels. Low blood sugar, in return, stimulates the appetite, especially cravings for more sugar.

4. Eat Foods High in Fiber

Fiber fills you up and helps stabilize blood sugar levels. There are two types of fiber: soluble and insoluble. We need both of them in our diet!

5. Lower Your Fat Intake

Limit foods that are high in fat.

6 . Consume Caffeine in Moderation, If at All

Caffeine, like alcohol, may be contained in beverages considered to be food but the effects of this chemical are definitely drug-like.

7. Exercise at least 3 times a week. Walk, walk, walk!!! Drink Plenty of water.

Pay attention to your body mass index and height and weight chart. Use the calculator from the websites below.

No its not bad don't worry! :)