The Student Room Group

Myth of naturally thin

Reading through many threads on the forum there is a comment that seems to always come up:

"some people can eat loads and not put on weight"

From my experience around "naturally thin" people they give a false impression of how much they eat. Often a "naturally thin" person will eat junk but then not eat for the rest of the day or not snack at night. Hence an observer, who does not watch them 24 hours a day, would think they pig out in the day (and automatically assume they do the same in the evening) and do not put on any weight. In fact the "naturally thin" person is eating a sensible amount of calories for their activity level (which is not usually any different to people who struggle with weight).

An interesting experiment was carried out by the BBC which illustrates this point:

http://www.bbc.co.uk/mediaselector/check/sn/humanbody/truthaboutfood/flashapp/ram/fatfriend?size=16x9&bgc=000000&nbram=1&bbram=1&nbwm=1&bbwm=1

It doesn't matter what time of day you eat. It is what and how much you eat, and how much physical activity you get, that determines whether you lose, maintain or gain weight. No matter when you eat, your body will store excess calories as fat.



Article from bbc:

Is it my metabolism?
Do you have a friend who can eat anything she wants and never put on weight? Do you simply look at a cake and feel your waistline expanding? Think it’s all down to your metabolism? Think again.

We found two best friends, Becky and Jo, with very different shaped bodies who think that how much you can eat is all down to your metabolic rate.

We decided to dispel this myth once and for all by closely watching, and testing our friends over the course of 10 days. Not completely trusting them to record their food diaries accurately, we also placed cameras around their homes and used our secret weapon- doubly labelled water. Without our volunteers realising, we could see exactly how many calories they were consuming and the energy they used to move around just by examining their daily urine samples. By asking them to keep the food diaries we could also see whether they were being truthful with themselves.

At the end of the week did their urine results match their food diaries? Not quite. Becky and Jo’s urine samples showed that although they did a similar amount of activity Becky ate 50% less per day than Jo.


"the larger you are the higher your metabolic rate"

In fact, the larger you are the higher your metabolic rate, the amount of energy your body uses at complete rest, will be. This is because when your body is at complete rest larger people need more energy to pump the blood around the body and to keep moving. Just as a big car uses more fuel so a bigger person uses more energy.

So, next time you go to blame your metabolism for your weight, remember the cold hard truth - thin people eat less.

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We can still say that people are "naturally" predisposed away from gaining fat, so long as we acknowledge the factor of appetite within that, which I think is reasonable.
Reply 2
I think that's good news for fat people. There's nothing more demotivating when trying to lose weight than the notion that all your effort could be undermined by some kind of 'inevitable weight.'
i was quite interested by your bbc article untill I came across the stupid conclusion 'thin people eat less'.

i aint convinced by your metabolic rate being larger if you are larger. Does anybody have any proof of this being the case?
Reply 4
Nice idea, but it's not really true, considering the presence of conditions such as polycystic ovary syndrome (whereby sufferers gain weight easily but find it extremely difficult to lose).

Are they trying to suggest that people can lose and put on weight just like that? I think they're trying to generalise too much, personally, and that there are other factors that haven't been accounted for in this experiment.
Reply 5
ffs thats *******s. Im a boy (who doesn't have the desire keep weight in check) Yet i honestly have the biggest appetite for junk food known to man, all day every day and i don't put on a single iota of fat and im still ridiculously slim, why is it so hard to comprehend.
Reply 6
Bluelight
ffs thats *******s. Im a boy (who doesn't have the desire keep weight in check) Yet i honestly have the biggest appetite for junk food known to man, all day every day and i don't put on a single iota of fat and im still ridiculously slim, why is it so hard to comprehend.



It does not matter if calories come from mars bars or apples, all that matters is the total calorie intake and expenditure.

For example: If I only eat 4 mars bars a day (1200 calories) and my body requires 1500 calories to maintain weight, I would experience weight loss.

The next day: If I eat 40 apples (2400 calories) and my body requires 1500 calories to maintain weight, I would gain weight.

Many people have the incorrect view that healthy food (such as fruit) are magical calories that are not equal to unhealthy food calories. In fact, all that is different is unhealthy foods are more calorie dense so you have to eat less to achieve same amount of total calories.


If you take in more calories than you expend, you gain weight. If you look at your diet carefully Bluelight I am sure you would find that your calorie intake over a week is roughly equal to your calorie expenditure.
Reply 7
numbertwo
It does not matter if calories come from mars bars or apples, all that matters is the total calorie intake and expenditure.

If you take in more calories than you expend, you gain weight. If you look at your diet carefully Bluelight I am sure you would find that your calorie intake over a week is roughly equal to your calorie expenditure.

Its definitely not im telling you. Who are you to tell me about my calorie expenditure. I think i'd know a damn sight better than you, other than walking I don't do any formal excercise. And im living off takeaways beer chips crisps and biscuits and have remained at a constant 10 Stone for about 2 years now.
Reply 8
So what you're saying is the word 'metabolism' means nothing? Nice one. :rolleyes:

I need to eat over 3000 calories a day to put on weight.
Some eat 2000 a day and put on weight.

Fact.
Reply 9
Bluelight
Its definitely not im telling you. Who are you to tell me about my calorie expenditure. I think i'd know a damn sight better than you, other than walking I don't do any formal excercise. And im living off takeaways beer chips crisps and biscuits and have remained at a constant 10 Stone for about 2 years now.


seriously, i feel sorry for any girl who goes down on you :puke:
Reply 10
Sithius
So what you're saying is the word 'metabolism' means nothing? Nice one. :rolleyes:

I need to eat over 3000 calories a day to put on weight.
Some eat 2000 a day and put on weight.

Fact.



If you take in more calories than you expend, you gain weight.
Bluelight
Its definitely not im telling you. Who are you to tell me about my calorie expenditure. I think i'd know a damn sight better than you, other than walking I don't do any formal excercise. And im living off takeaways beer chips crisps and biscuits and have remained at a constant 10 Stone for about 2 years now.


so? Tell us how many calories you actually eat per day and then we can see if you're as unusual as you say
Reply 12
Hmmm, I'm not naturally 'thin' but I am kinda slim/curvy. People think I eat loads and I probably give that impression by snacking all the time, but I don't actually tend to eat a lot in one go. I'm definitely not a big three-course meal type of person, as I get full way too easily. Plus I'm always on the go, and get lots of exercise from walking about. I think the OP is right in that naturally thin people don't eat that many excess calories compared to everyone else. In the end they might just have different eating patterns, but they know their limits and their energy intake/expenditure balance is just more regulated.
Bluelight you must be really healthy...
InPictureLoansWeTrust
i aint convinced by your metabolic rate being larger if you are larger. Does anybody have any proof of this being the case?


If YOU get heavier than YOUR metabolic rate increases.

Or, with all other things constant, higher weight means a higher metabolism. When comparing between different people, all other things are not constant, so its pointless.

Since it is only one factor that determines metabolic rate, we can't say that a bigger person has a higher metabolism than a smaller person.

---

Also consider such factors as efficiency of digestion
Reply 15
Given that because this is coming from a media organisation that recently said that a planet that appeared similar to Earth "also has gravity", I'm less than inclined to take this as accurate.

Besides, observing two people does not make an experiment.
why, even in this thread, are people still saying such meaningless things as "I eat a lot" or "I don't eat muchLOL"

unless you can put a number on it, your reporting is subject to colouring by your appetite/traditions/habit which suggests to you how subjectively large a quantity of food is. This is different for different people, so is useless in communicating.
If YOU get heavier than YOUR metabolic rate increases.

Or, with all other things constant, higher weight means a higher metabolism. When comparing between different people, all other things are not constant, so its pointless.

Since it is only one factor that determines metabolic rate, we can't say that a bigger person has a higher metabolism than a smaller person.


Nicely put.

So the case study used by the BBC is pretty rubbish really. Doesn't seem to be much more point in this thread as Rock Eleven has given a nice little summary there. We can talk for hours about individual opinions and situations but that isn't really going to achieve anything
Any TV **** like this is gay as ****. I remember one thing where, to "proove" that omgsaturatedfat was evil, they made this athletic dude, who was disgusted by, and apparently allergic to, cheese, eat a pound of it every day on top of his normal diet. To get it all in he upped his intake of all sorts of other ****, like bread and pizza, etc etc.. needless to say, he suffered all sorts of problems, which then the programme proclaimed was solid evidence that we should eat grains forever and be happy.

What a load of gayness, **** everything
Reply 19
numbertwo
If you take in more calories than you expend, you gain weight.


Right. Why have you quoted my post?