[url]http://www.sciencedaily.com/releases/2013/09/130916103352.htm[/url]
[IMG]http://images.sciencedaily.com/2013/09/130916103352.jpg?1379343387[/IMG]
[QUOTE][B]The way the stomach detects and tells our brains how full we are becomes damaged in obese people but does not return to normal once they lose weight, according to new research from the University of Adelaide.[/B]
"The stomach's nerve response does not return to normal upon return to a normal diet. This means you would need to eat more food before you felt the same degree of fullness as a healthy individual," says study leader Associate Professor Amanda Page from the University's Nerve-Gut Research Laboratory.
"A hormone in the body, leptin, known to regulate food intake, can also change the sensitivity of the nerves in the stomach that signal fullness. In normal conditions, leptin acts to stop food intake. However, in the stomach in high-fat diet induced obesity, leptin further desensitizes the nerves that detect fullness.
"These two mechanisms combined mean that obese people need to eat more to feel full, which in turn continues their cycle of obesity."
Associate Professor Page says the results have "very strong implications for obese people, those trying to lose weight, and those who are trying to maintain their weight loss."
"Unfortunately, our results show that the nerves in the stomach remain desensitized to fullness after weight loss has been achieved," she says.
Associate Professor Page says they're not yet sure whether this effect is permanent or just long-lasting.
"We know that only about 5% of people on diets are able to maintain their weight loss, and that most people who've been on a diet put all of that weight back on within two years," she says.
"More research is needed to determine how long the effect lasts, and whether there is any way -- chemical or otherwise -- to trick the stomach into resetting itself to normal."[/QUOTE]
I hate reading about our bodies messing with us. Nature sure is cruel.
wow, that must really suck. just imagine how terrible life would be for an obsese man who managed to lose weight? he'd never be satisfied by the amount of food he eats ever again.
Explains why even after a full meal, I still feel the need to eat when I'm overweight and trying to eat less.
Well it's the bodys adaptation to the time where resources were scarce
With calorie counting, you eventually learn to get over the whole "fullness sense" and instead focus more on your intake and limits. Or, as I'd like to call it, "having self control".
[QUOTE=Water-Marine;42215581]With calorie counting, you eventually learn to get over the whole "fullness sense" and instead focus more on your intake and limits. Or, as I'd like to call it, "having self control".[/QUOTE]
but who the fuck wants to count every god damn calorie
[QUOTE=LVL FACTORY;42215486]Well it's the bodys adaptation to the time where resources were scarce[/QUOTE]
More like the body's lack of adaption since we probably never gorged ourselves with so much food back then to even lead to obesity in the first place.
The fact that the nerve desensitization is permanent presents no evolutionary advantage at all. If anything it is an evolutionary drawback considering it means that if someone were to have an extremely abundant supply of food that suddenly grows scarce (like during a really bad winter or drought) it won't be rationed properly due to the never-ending non-adaptive hunger which leads to death of starvation.
[QUOTE=Diet Kane;42215609]but who the fuck wants to count every god damn calorie[/QUOTE]
People who are determined to lose weight?
Not sure if you're trying to joke here or not, but if serious then there's plenty of applications nowadays that cater to it for easier use.
[editline]16th September 2013[/editline]
[QUOTE=Mindtwistah;42215613]More like the body's lack of adaption since we probably never gorged ourselves with so much food back then to even lead to obesity in the first place.
The fact that the nerve desensitization is permanent presents no evolutionary advantage at all. If anything it is an evolutionary drawback considering it means that if someone were to have an extremely abundant supply of food that suddenly grows scarce (like during a really bad winter or drought) it won't be rationed properly due to the never-ending non-adaptive hunger which leads to death of starvation.[/QUOTE]
Being the dominant race on this planet means we really have no reason for evolutionary changes in our system when you think about it.
[QUOTE=Diet Kane;42215609]but who the fuck wants to count every god damn calorie[/QUOTE]
Be it losing or gaining weight, calorie counting is an essential tool these days. Nobody wants to do it in the same way that people don't enjoy the dentist. Doesn't make it any less necessary.
Wasn't that 95% figure proven to be total garbage?
I've lost over 100 pounds and while I can vouch for my appetite still being fairly large, I never feel the need to binge eat like when I did back when I was a fat fuck. I also really doubt I'm just part of the elusive 5%.
[QUOTE=Water-Marine;42215661]Being the dominant race on this planet means we really have no reason for evolutionary changes in our system when you think about it.[/QUOTE]
Evolution never stops.
Diet and exercise are part of a healthy lifestyle anyways so it's good to keep it up.
That's what I'm doing to lose weight, and it's probably what I'll continue doing even after I'm at where I want to be so I can keep the weight off.
Therefore, I suppose there could be a silver lining to this, at least for me.
[QUOTE=Sobotnik;42215726]Evolution never stops.[/QUOTE]
Except we have no natural selection due to medicine, housing and many other factors.
So yes, it does actually stop.
[QUOTE=Diet Kane;42215609]but who the fuck wants to count every god damn calorie[/QUOTE]
People trying to watch their weight???
People trying to lose weight???
People trying to build muscle mass???
People trying to slim down on muscle mass???
People with condition specific metabolisms???
People who enjoy healthy lifestyles???
Also in conjunction to the article that clears up explanations for quite a few things I've seen, though personally my appetite got smaller as I lose weight, something I could finish in a sitting I usually can't even finish half of, then again I was never obese, so maybe that has something to do with it.
[QUOTE=Erfly;42215981]Except we have no natural selection due to medicine, housing and many other factors.
So yes, it does actually stop.[/QUOTE]
Until the day as a species that we begin reproducing by only cloning ourselves, with NO genetic mutations whatsoever, we are continually evolving with every generation.
This happened to me too. I wasn't exactly obese though, I started exercising a lot and eating right and lost 25kg (55lbs) and now weigh 77kg (170lbs) and I've not felt "satisfied"-full in a loooooong time.
I fight back by serving food on smaller plates, you consume more if you put more on a bigger plate, it doesn't help that your brain is delayed when determining when you're full. Its best to eat a meal and wait I find, if I'm still hungry I go for something protein rich or even consist the meal with lots of protein foods. It can be very hard losing weight because when your brain requires food it sends off signals demanding protein, fats and sugars. This for a fat person usually results in junk food desires and fatty foods (ever had a random craving for Chinese food?).
What's worse is when you live in a decadent culture that has no impulse control or bad habits with eating. For example although French cuisine is probably the symbol of gluttony, they are considerably healthier and happier than the British or Americans, this is because they have brought up learning about control with diet, snacking and portion control, including understanding too much of a good thing.
The best thing to eat on to fill yourself up with is stews and soups, the liquid stays in your stomach considerably longer than solids, resulting in you being fuller for longer.
[QUOTE=Erfly;42215981]Except we have no natural selection due to medicine, housing and many other factors.
So yes, it does actually stop.[/QUOTE]
Natural selection is a different beast than that.
Basically, when an animal has a bunch of offspring, they will have slight mutations.
In the environment in which these animals live, these mutations will either help them to survive and then create more babies, or do the opposite.
Over time, these slight mutations compound to create big changes in the animal.
Today, this still happens. Babies are very slightly different to their parents, and the mutations these babies have will either make them more or less successful when it comes to surviving and having children.
Even giving medicine to the ill and caring for the weak won't stop it. People can choose who to have babies with, and as long as that happens, evolution will continue.
Even psychology is influenced by this.
[editline]16th September 2013[/editline]
[QUOTE=Draghosta;42216040]Until the day as a species that we begin reproducing by only cloning ourselves, with NO genetic mutations whatsoever, we are continually evolving with every generation.[/QUOTE]
This is pretty much impossible anyways.
[QUOTE=Vasili;42216136]I fight back by serving food on smaller plates, you consume more if you put more on a bigger plate, it doesn't help that your brain is delayed when determining when you're full. Its best to eat a meal and wait I find, if I'm still hungry I go for something protein rich or even consist the meal with lots of protein foods. It can be very hard losing weight because when your brain requires food it sends off signals demanding protein, fats and sugars. This for a fat person usually results in junk food desires and fatty foods (ever had a random craving for Chinese food?).
What's worse is when you live in a decadent culture that has no impulse control or bad habits with eating. For example although French cuisine is probably the symbol of gluttony, they are considerably healthier and happier than the British or Americans, this is because they have brought up learning about control with diet, snacking and portion control, including understanding too much of a good thing.
The best thing to eat on to fill yourself up with is stews and soups, the liquid stays in your stomach considerably longer than solids, resulting in you being fuller for longer.[/QUOTE]
The plate thing is actually fairly true, seems like you can fool your brain sometimes.
[editline]16th September 2013[/editline]
Also as a slightly overweight person I can say that if you do feel hungry then drink a lot of water, not only will it make you feel fuller, but it will also help you lose weight (if you're looking for that).
[QUOTE=Erfly;42215981]Except we have no natural selection due to medicine, housing and many other factors.
So yes, it does actually stop.[/QUOTE]
Evolution =/= Natural Selection
but Natural Selection = Evolution.
Sexual Selection is thriving.
[QUOTE=Erfly;42215981]Except we have no natural selection due to medicine, housing and many other factors.
So yes, it does actually stop.[/QUOTE]
Wow people still believe this?
Mate, we still experience random genetic mutation, that drives evolution, just because we aren't getting mauled to death by wild animals doesn't mean we aren't evolving.
Christ how do people not know that shit in the year 2013?
[QUOTE=bravehat;42216449]Wow people still believe this?
Mate, we still experience random genetic mutation, that drives evolution, just because we aren't getting mauled to death by wild animals doesn't mean we aren't evolving.
Christ how do people not know that shit in the year 2013?[/QUOTE]
My favorite part is how people say evolution has stopped despite the fact that it's acknowledge that evolution doesn't happen as fast as they'd like to think.
As someone that's been fighting obesity and has gained/lost over 200 pounds in a roller coaster fashion the past 5 years, I know this is a freaking killer. I lost a great deal of weight to meet military specs, but after that fell through for unrelated reasons, the moment I stopped focusing every minute on my fitness, I shot up to and past my previous maximums.
It's taken me two years to get about 2/3 of the way back to where I was back in my 'crash diet' days, and only now am I starting to feel confident in myself. I have to work out and be mindful of every calorie, when I eat, how often I eat, what the calorie/fat/sodium/carb counts of the foods I eat are, and actively fight hunger to maintain and loose.
On the other end of the isle, I have friends that have never even had to worry about such things, it's one of the most frustrating things I've ever had to deal with.
[QUOTE=Major_Vice;42216650]
On the other end of the isle, I have friends that have never even had to worry about such things, it's one of the most frustrating things I've ever had to deal with.[/QUOTE]
While I'd usually say something like " you shouldn't be frustrated, be happy for your friends " I won't because I know what it's like to work for a healthy lifestyle then see people like that and in comparison to situations, it can be incredibly frustrating. I have a friend who does nothing fitness wise, and his body's metabolism is at crazy rates to where he's skinny as hell despite his constant eating. It's like it's just a random pull when it comes ability to lose, gain, or maintain weight.
Well fuck, I'm losing weight right now
But the information I've gotten is that normally it takes 3-6 years to develop a new underlying healthy eating habit
[QUOTE=xeo xeo;42216746]Well fuck, I'm losing weight right now
But the information I've gotten is that normally it takes 3-6 years to develop a new underlying healthy eating habit[/QUOTE]
It's a massive part of your life, it's worth the time and effort to secure a healthy eating habit.
[QUOTE=Sobotnik;42215726]Evolution never stops.[/QUOTE]
No, but it can stay pretty stagnant, I mean manatees have pretty much been the same grey blobs since the dinosaurs turned to ash, probably even longer iirc
Appetite is the killer for me funny enough. I can ignore hunger, but not appetite. Sometimes my appetite just does not happen, and on those days, I can go without eating and not be bothered until I feel physically ill. Really wish Appetite was voluntary.
I suppose this is why many grossly overweight people elect to have their stomachs surgically reduced. I always thought that was a bit weird.
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