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Genetics and weight
Replies
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I was always chubby. My family and friends assured me, "oh, you aren't fat, you're big boned, muscular, and so on." Then I lost the weight. I actually have a fairly light bone frame. I was fat.13
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My husband is what I would consider larger framed--broad shoulders, thick wrists, etc. Yet it doesn't prevent him from reaching a healthy body fat level, which is what I consider slim to be. There's no reason to think that having a larger frame requires an addition amount of padding (i.e., fat.)6
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The_Enginerd wrote: »krisb1701d wrote: »Bacteria outnumber our cells ten to one, and if the drive you to eat... There is little you can do in the short term to combat that.
http://www.nature.com/news/scientists-bust-myth-that-our-bodies-have-more-bacteria-than-human-cells-1.19136
Interesting paper, thanks for that. While his findings are still under review it does note that there is still a higher concentration in the gut. I believe the point about the GI microbiota driving us to eat still stands.1 -
My "genetics" made me fat, yet when I cleaned up my eating and exercised regularly, my "genetics" suddenly made me fit and healthy with a total weight loss of 80 pounds.
People love excuses....12 -
My Nutrition teacher (who has her degree in exercise physiology) believes someone can be healthy/athletically fit/metabolically normal and still be overfat. I would say it is normally an excuse but she says there are some people whose bodies are just really good at storing fat. Twin studies have shown that genetics can play enough of a part that fat-prone children will still weigh more than their peers when they are adopted by a normal weight family.
Having a larger frame would mean your 'ideal weight' is a little bit higher but it isn't like we're talking about 30 lbs higher. The difference between medium frame and large frame is only like 10 lbs, and it is likely at least some of that is going to muscle and bone mass.4 -
There is more and more evidence that there is a genetic component to weight gain/obesity (e.g. this paper published this month).
The exact magnitude of the contribution is unknown and even if it is quantifiable, is likely to be small. But that's not to say that it will be easy - we'll just have to work a bit harder at CICO and perhaps have to put up with more bumps and stalls along the way. Sound familiar?
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While there is some debate on the impact of genetics on weight loss your friends statement is basically an excuse. I cant remember who said this but I think its true "I find people that say the can, or cannot, achieve something are usually right". In other words if you decide you're gonna fail before you start, guess what? You'll fail. Some people will have a genetic issue no doubt, but all too often, when I hear that sort of argument ( "I can never lose weight / stop eating meat / do regular exercise / eat healthy food") its short for "I cant be bothered changing".
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FreyasRebirth wrote: »Having a larger frame would mean your 'ideal weight' is a little bit higher but it isn't like we're talking about 30 lbs higher. The difference between medium frame and large frame is only like 10 lbs, and it is likely at least some of that is going to muscle and bone mass.
What I've read is that it can be up to 10% difference. So, for me, that would mean the top end moves from ~ 180 to ~200. But, I do know my current goal of 220 is still overweight.
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Tacklewasher wrote: »FreyasRebirth wrote: »Having a larger frame would mean your 'ideal weight' is a little bit higher but it isn't like we're talking about 30 lbs higher. The difference between medium frame and large frame is only like 10 lbs, and it is likely at least some of that is going to muscle and bone mass.
What I've read is that it can be up to 10% difference. So, for me, that would mean the top end moves from ~ 180 to ~200. But, I do know my current goal of 220 is still overweight.
Why do you say that it moves your top end up? Normally there is a healthy weight range. For my height the range is 115-154. I would expect that a larger framed woman may have an ideal weight on the higher end of that, medium frame in the middle, small frame at the bottom.5 -
krisb1701d wrote: »The_Enginerd wrote: »krisb1701d wrote: »Bacteria outnumber our cells ten to one, and if the drive you to eat... There is little you can do in the short term to combat that.
http://www.nature.com/news/scientists-bust-myth-that-our-bodies-have-more-bacteria-than-human-cells-1.19136
Interesting paper, thanks for that. While his findings are still under review it does note that there is still a higher concentration in the gut. I believe the point about the GI microbiota driving us to eat still stands.
At this time, some correlations between gut bacteria population and weight/obesity have been found, but I believe it would be a drastic overstatement of the evidence to date to suggest that there is causation of any sort causing folks to overeat. Folks who are overweight also tend to eat more/differently and be less active. My gut () feeling is the causation is likely the other way and the differences in bacterial populations found is due to the lifestyle differences that lead to obesity.
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Eskimo bodies evolved to be short and round to retain heat. Sudanese bodies evolved to be tall and thin to survive in the heat and the humidity. We inherit a genetic disposition, AND tend to eat like our parents. BOTH of these things make us resemble them. However, twins separated a birth tend to look like their ADOPTIVE families. This demonstrates that obesity can be defeated with eating for strength and exercise, but it would be very difficult for Eskimos to become very thin.5
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My personal belief based on years of research and the fact I'm occupationally obliged to know about how the human body works, is that nobody is genetically prone to being over-weight.
The problem to me is, when parents and family around you act in a certain way and you've been brought up around a certain mentality towards food then it's far easier to blame genetics than simple - bad habits formed over a lifetime.
Success stories on here prove that anybody with the right amount of determination can reach the body type they truly want.
The thing that makes the real difference is, if people are prepared to make a plan instead of excuses.13 -
I was slim my whole life, and started gaining weight at around age 39-40. Can i blame genetics or big boned and/or having a large frame??
I'm more inclined to blame my inability to stop stuffing food in my mouth, lack of willpower and an "i dont care" attitude. .
Chances are high that if the parents are obese, their kids will follow suit. They don't know any better, nor were they taught a healthy lifestyle from birth. Eating to the point of obeseness is their normal.4 -
It's the availability of food. If you give an animal too much food it will get fat, unless it's very active. We are no different.3
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I don't think you can just say my parents are big so I will be too. My mother's side of the family are all overweight and there's a lot of them! But only because they're all lazy and eat crap. My father's side are mostly slim. My father has never been overweight as far as I can remember. I seem to have inherited my father's build (wide shoulders slim waist) but my mother's ability to eat huge amounts of crap - not sure if the latter is genetics. I'm overweight now but not yet classed as obese, never have been. My two siblings are well into being obese and getting bigger. I seem to be a lot more like my father than they are, but I also have a different way of thinking to them - is this genetics, or just self-mental conditioning?
As others have said, my opinion is that it's probably more likely to copy family traits rather than genetically inherit them. If I ate what my mother ate, I'd probably be obese too. My siblings take after my mother, I take after my father, but surely that's choice. My siblings can't possibly be genetically swayed to eat crap, surely they just choose to copy what they think is 'normal'?0 -
snowflake954 wrote: »It's the availability of food. If you give an animal too much food it will get fat, unless it's very active. We are no different.
This is rather simplistic.
Sure, readily available food and never having to go without is a factor in obesity. It's not the only one though.
And there are plenty of people living in an abundant, first world environment who maintain healthy weight without being 'very active'.
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snowflake954 wrote: »It's the availability of food. If you give an animal too much food it will get fat, unless it's very active. We are no different.
This is rather simplistic.
Sure, readily available food and never having to go without is a factor in obesity. It's not the only one though.
And there are plenty of people living in an abundant, first world environment who maintain healthy weight without being 'very active'.
This is true, but when there is extreme lack of food, there is no obesity.5 -
Just going to throw this out there: FTO
Loos, Ruth JF, and Giles SH Yeo. "The bigger picture of FTO - the first GWAS-identified obesity gene." Nature Reviews Endocrinology 10.1 (2014): 51-61.
Claussnitzer, Melina, et al. "FTO obesity variant circuitry and adipocyte browning in humans." N Engl J Med 2015.373 (2015): 895-907.
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Over half of my immediate family is overweight or at least they struggle to keep weight off. My father,one of my sisters,and I,are/were the opposite and struggle to put weight on. I grew up in the 50s and 60s and we all had the same diet. The difference was in the amount we ate. The thin ones like me tend to eat smaller portions,only eat when we're hungry,stop eating when we're full and rarely snack in between meals. And we tend to be more active.(In my recent efforts to gain weight,I've had to reverse those habits) So in my experience,yes genetics may play a part but it's eating and exercise habits that have shaped me and my family.2
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Getting overweight/obese is a LEARNED behavior for the most part. In some cases genetics does play a part, but it's due more to HEALTH ISSUES and not how one is built, framed, height, etc.
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