Net Calories?

Deborah102310

I'm having a hard time understanding what my net calories should be if I want to lose weight. Should it be a negative number everyday in order to lose wight?

hopesOFskinny

if anything it should never be a negative number cuz you should eat your excerise calories back.

killagb

No. In MFP, it should show 0 remaining, or as close to it as you can manage. Your body burns up so many calories just getting through the day, which MFP calculates using your height, weight and lifestyle activity level, then MFP builds a deficit of calories into that number based on how fast you told it you want to lose the weight (1lb/wk etc). If you exercise, this adds to the amount of calories you should eat. So for example:

Daily goal: 1600
Exercise for the day: 400
Net calories to eat: 2000

Eating back your exercise calories keeps you at the same reasonable deficit it calculated in the first place, rather than risking slowing your metabolism by not eating enough, granted this subject is a hot topic around here and you will hear other opinions on that.

Amo_Angelus

it hould never be less than 1200

jackieb79

Ideally, your net should be whatever your daily calorie target is.

eg. if your daily target is 1400, then your net should be 1400. If you exercise, the calories burned are deducted from your net and you'll need to eat more calories to hit your net.

TavistockToad

then net cals should be as close as possible as what your calorie goal is.

for example, my cal goal is 1370.
i ate 1500 cals
i worked out and burnt 200 cals
my net cals is 1300
pretty close, well done me!

the calorie goal has a built in deficit so that u will lose weight regardless of whether u exercise or not. so if u do exercise, you can eat the calories that u burn off. hope that makes sense!

danizaga

I am so confused. So if MFP calculates my calorie goal as 1970 and I burned 200 calories walking. I actually need to eat 2170 calories?

Why do I need to eat the extra 200 calories? If I've already reached my calorie goal for the day? Eating the extra 200 calories does not make sense to me because you need to have a calorie deficit to lose weight.

kiwilan

No you have had 1970 calories to eat you burn 200 calories in exercising (1970-200) so.. NET=1770 therefore you need to eat back (or get as close to) 1970 because you have burned off some of your calories.

airycha

The 1970 is what you would need to lose weight without exercising so you are already at a calorie deficit. You should eat back your exercise calories so you don't get too much of a deficit.

killagb

No you have had 1970 calories to eat you burn 200 calories in exercising (1970-200) so.. NET=1770 therefore you need to eat back (or get as close to) 1970 because you have burned off some of your calories.

That's basically what she said. Eating 2170 is the same as eating 200 extra calories to account for the exercise done. MFP calculates a deficit already, you don't need to make it larger with exercise, that's the point of all this.

kapeluza

"OK, this will be long. Please read it if you are confused. Disclaimer: I am not a dietician or a doctor, just a successful loser and maintainer, who has consulted both doctors and dieticians.

Question #1:

Should I eat all my calories?

Yes. MFP is already figuring a deficit for you to lose weight. This deficit is based on what you need to eat based on your everyday activity, not counting exercise. In the end, it's all about "net calories" (you can view yours under reports)

Example: you need to eat 2,000 calories to maintain your current weight (random number)
MFP will tell you to eat 1,500 to lose one pound per week (500x7=3500=one pound loss).

Let's say you exercise, and burn 500 additional calories.
UH-OH, now you are at a 1,000 calorie a day deficit. You need 2,000 calories to maintian, are already restricted to 1500, so now your net calories are a 1,000 a day. This is starvation central. Your body, which is very good at keeping you alive, will store and save calories. You WILL stop losing weight. You WILL want to throw your scale out the window.

Eat your exercise calories. At least eat most of them.

Question #2:
I'm eating 1200 calories, I feel like crap and I'm not losing weight. What gives?

Answer:
Run, don't walk, to "tools" and use the BMR calculator. Please, please, please, eat at least your BMR calories every day. You might lose weight more slowly, but you will still lose, and you will not longer feel a sudden urge to fall over every time you do, well, anything.

Question #3:
I'm doing "everything right" and the scale won't move.

Answer #1: The scale is the devil. Step away from the scale. Buy a tape measure, notice how your clothes are (probably) fitting better. Muscle is more dense than fat, and takes up less space on your body. More muscle on your body will make the scale freeze or (gasp) move upward.

Answer #2: You're not being honest. In order for this to work, you must record every morsel of food that goes in your body. Also, if you ride a stationary bike for 30 minutes and barely break a sweat and can still chatter on your cell phone (OK, that's my personal gym pet peeve) then you're probably not working "vigorously". Don't overestimate your exercise calories. (this was a big mistake I made in the past.)

Answer #3: Your body might be re-adjusting. How you feel is the most important mark of progress. It's very easy to fixate on numbers, but feeling better really should be its own reward.

Question #4:
So, if I'm eating my exercise calories, what's the point of exercise?

Answer: (warning: extremely opinionated answer ahead)
You don't. You can lose weight through diet alone. But, then you will be skinny and flabby. Is a model skinnier than me? OH, YES! Is she healthier than me? probably NOT. She couldn't survive the hour-long spin class that I take three times a week. Trust me. Her skin is a mess, she smokes, and she looks like crap in person. (this is a generalization. I don't hate models, but this is their lifestyle. . .I used to be a "dresser" at shows, and I saw a lot of "behind the scenes" stuff.

Does that help? Please say it does.flowerforyou"

kapeluza

"I still see many people that are confused or "question" the idea of eating your exercise calories. I wanted to try (as futile as this may turn out to be) to explain the concept in no uncertain terms. I'll save the question of "eating your exercise calories" for the end because I want people to understand WHY we say to do this.

NOTE: I'm not going to use a lot of citation in this, but I don't want people thinking this is my opinion, I have put much careful research into it, most of which is very complicated and took a long time for me to sift through and summarize, and thanks to my chemical engineering backgroud I have the tools to read clinical studies and translate them (somewhat) into more human terms. Some of this information comes from sources I can't forward because they are from pay sites (like New England Journal of Medicine), so you can ask for anything, but I may or may not be able to readilly provide it for you (I can always tell you where to go if you want to though).

I'll break it down into 3 sections.
Section 1 will be our metabolic lifecycle or what happens when we eat and how our body burns fuel.
Section 2 will be what happens when we receive too much, too little, or the wrong kind of fuel.
Section 3 will be the steps needed to bring the body to a healthy state and how the body "thinks" on a sympathetic level (the automatic things our body does like digestion, and energy distribution).

Section 1:
Metabolism, in "layman's" terms, is the process of taking in food, breaking it down into it's components, using the food as fuel and building blocks, and the disposal of the poisons and waste that we ingest as part of it. Metabolism has three overall factors, genetics, nutrition, and environment. So who we are, what we eat, and how we live all contribute to how our metabolism works. You can control 2 of these 3 factors (nutrition, environment).
When you eat food, it is broken down into it's component parts. Protein, vitamins and minerals are transported to the cells that need them to build new cells or repair existing cells. Fats(fatty acid molecules) and carbohydrates are processed (by 2 different means) and either immediately burned or stored for energy. Because the body doesn't store food in a pre-digested state, if you eat more carbs and fat then you need immediately, the body will save them for later in human fat cells (adipose tissue). This is important to realize because even if you eat the correct number of calories in a 24 hour period, if you eat in large quantities infrequently (more then you can burn during the digestion process), your body will still store the extra as fat and eliminate some of the nutrients. (Side note: this is why simple or processed carbs are worse for you compared with complex carbs)

Section 2:
The human body has a set metabolic rate (based on the criteria stated above), this rate can be changed by overall nutritional intake over a period of time, or by increasing activity levels also over a period of time (the exact amount of time for sustained increase in metabolic rates is the subject of some debate, but all studies agree that any increase in activity level will increse the metabolism).
It is important to note that obesity does not drasticly change the level of metabolic process, that means that if you become obese, you don't burn a higher fat percentage just because you have more to burn.
The balance of incomming fuel vs the amount of fuel the body uses is called maintenance calories, or the amount of calories it takes to run your body during a normal day (not including exercise or an extremely lethargic day). The metabolism is a sympathetic process, this means it will utilize lower brain function to control it's level, it also means it can actively "learn" how a body is fitness wise, and knows approximately how much energy it needs to function correctly. It also means automatic reactions will happen when too much or too little fuel is taken in. Too much fuel triggers fat storage, adipose tissue expands and fat is deposited, also free "fat" cells (triglycerides) will circulate in the blood stream (HDL and LDL cholesterol). Too little fuel (again, over an extended period) triggers a survival mode instinct, where the body recognizes the lack of fuel comming in and attempts to minimize body function (slowing down of non-essential organ function) and the maximization of fat storage. It's important to note that this isn't a "switch", the body does this as an ongoing analysis and will adjust the levels of this as needed (there is no "line" between normal and survival mode.).
When you're activity level increases, the human body will perform multiple functions, first, readily available carbohydrates and fats are broken down into fuel, oxydized, and sent directly to the areas that need fuel, next adipose (body) fat is retreived, oxydized, and transported to the areas it is needed for additional fuel, 3rd (and this is important), if fat stores are not easilly reachable (as in people with a healthy BMI where adipose fat is much more scarce), muscle is broken down and used for energy. What people must realize is that the metabolism is an efficiency engine, it will take the best available source of energy, if fat stores are too far away from the systems that need them or too dense to break down quickly, then it won't wait for the slower transfer, it will start breaking down muscle (while still breaking down some of that dense fat as well).

Section 3:
The wonderful part of the human metabolic system is it's ability to adapt and change. Just because your body has entered a certain state, doesn't mean it will stay that way. The downfall to this is that if organs go unused over a long period, they can lose functionality and can take years to fully recover(and sometimes never).
As long as there is no permenant damage to organ function, most people can "re-train" their metabolism to be more efficient by essentially showing it (with the intake of the proper levels and nutritional elements) that it will always have the right amount and types of fuel. This is also known as a healthy nutritional intake.
Going to the extreme one way or the other with fuel consumption will cause the metabolism to react, the more drastic the swing, the more drastic the metabolism reacts to this (for example, a diet that limits fat or cabohydrate intake to very low levels). In general terms, the metabolism will react with predictable results if fuel levels remain in a range it associates with normal fuel levels. If you raise these fuel levels it will react by storing more fat, if you lower these fuel levels, it will react by shutting down processes and storing fat for the "upcomming" famine levels. The most prominent immediate issues (in no particular order) with caloric levels below normal are reduced muscle function, reduction of muscle size and density, liver and kidney failures, increase in LDL (bad) cholesterol levels, and gallstones .


Now onto the question of "Eating your exercise calories"

As I have hinted to throughout this summary of metabolic process, the body has a "range" in which it feels it is receiving the right amount of fuel. The range (as most doctors and research scientists agree) is somewhere between 500 calories above your maintenance calories and 1000 calories below your maintenance calories. This means that the metabolism won't drastically change it's functionality in this range, with that said, this is not exact, it is a range based on averages, you may have a larger or smaller range based on the 3 factors of metabolism stated at the top.
On our website (MyFitnessPal), when you enter your goals, there is a prebuilt deficit designed to keep you in the "normal" metabolic functionality while still burning more calories then you take in. This goal DOES NOT INCLUDE exercise until you enter it. If you enter exercise into your daily plan, the site automatically adjusts your total caloric needs to stay within that normal range (in other words, just put your exercise in, don't worry about doing any additional calculations). Not eating exercise calories can bring you outside that range and (if done over an extended period of days or weeks) will gradually send your body into survival mode, making it harder (but not impossible) to continue to lose weight. The important thing to understand is (and this is REALLY important) the closer you are to your overall healthy weight (again, your metabolism views this a a range, not a specific number) the more prominant the survival mode becomes (remember, we talked about efficiency). This is because as fat becomes scarce, muscle is easier to break down and transport. And thus, the reason why it's harder to lose that "Last 10 pounds".

I really hope this puts a lot of questions to bed. I know people struggle with this issue and I want to make sure they have the straight facts of why we all harp on eating your exercise calories.

-Regards,

Banks "

danizaga

Thanks for breaking it down. I still have questions but I think I need to see a nutritionist.