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People with low BMI aren't more active, they are just less hungry, 'run hotter'

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Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#21
post #5
post #3

"We expected to find that these people are really active and to have high activity metabolic rates matched by high food intakes," says corresponding author John Speakman, a professor at the Shenzhen Institutes of Advanced Technology in China and the University of Aberdeen in the UK. "It turns out that something rather different is going on. They had lower food intakes and lower activity, as well as surprisingly highe…

Makes me wonder, if thyroid disorders can cause obesity, can thyroid-modifying therapy or exogenous thyroid hormones treat obesity?

Common symptoms of thyroid disorders include obesity and/or excessive thinness (not anorexia per-se, but it can look like it), along with a cornocopia of other issues.

Certain mental disorders (depression and anxiety) also highly correlate with obesity and/or underweight.

A common treatment for ADHD (stimulants) often gets folks to a healthy weight that previously struggled on one side or the other.

It’s a complex problem, with a lot of ever changing variables we have little insight into.

Anecdotally, I know of several boomers that had serious thyroid issues likely tied to exposure to the Santa Susana Field Lab and Nevada nuclear testing. They were consuming milk and other products from areas contaminated by them at the right times.

All the various plastics we’ve all been exposed to and other various chemicals are also likely doing something too.

But also, the whole country has gotten dramatically more sedentary and media consumption focused, and the media keeps getting more and more anxiety inducing and alienating. As a country, we all need to ‘get out and touch some grass’ more too.

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#22
post #2

"The investigators acknowledge some limitations on this research, including the fact that although they measured food intake, *they didn't measure what the participants were actually eating or their feelings of satiation or satiety*." This seems to directly contradict the title. EDIT: What food they are eating and how satiating that food may be is irrelevant . They did not measure the participants feelings of satiati…

Caloric intake is a measure of the energy we receive from food accurately, i believe they are referring more-so to an idea in a recent popular HN post, potatoes,[1] and which foods are more filling. It could be that there is error in what the less-eating participants happen to eat more-filling food, but not that the entire hypothesis would be incorrect.

[1] https://dynomight.net/potato-diet/

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#23
post #2

"The investigators acknowledge some limitations on this research, including the fact that although they measured food intake, *they didn't measure what the participants were actually eating or their feelings of satiation or satiety*." This seems to directly contradict the title. EDIT: What food they are eating and how satiating that food may be is irrelevant . They did not measure the participants feelings of satiati…

[deleted]

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#24

Earlier quoted context omitted.

I like to think of "peer review" in the same way as "peer code review". Just because someone looked at it and approved it doesn't mean that it is free of shortcomings and defects.

Not just "peer code review" from a good friend or someone working on the same project as you - a review from somebody who has a ton of stuff to review at once, in many different areas, and very limited time to do it.

Still better than something someone didn’t even bother trying to peer review, usually.

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#25
post #3

"We expected to find that these people are really active and to have high activity metabolic rates matched by high food intakes," says corresponding author John Speakman, a professor at the Shenzhen Institutes of Advanced Technology in China and the University of Aberdeen in the UK. "It turns out that something rather different is going on. They had lower food intakes and lower activity, as well as surprisingly highe…

[deleted]

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#26
post #2

"The investigators acknowledge some limitations on this research, including the fact that although they measured food intake, *they didn't measure what the participants were actually eating or their feelings of satiation or satiety*." This seems to directly contradict the title. EDIT: What food they are eating and how satiating that food may be is irrelevant . They did not measure the participants feelings of satiati…

Totally agree with your point and find it really annoying. The original journal entry is titled: 'Higher than predicted resting energy expenditure and lower physical activity in healthy underweight Chinese adults.' and makes no such 'less hungry' claim. That appears to have been introduced from the 'cell press' journal/article promoting organization.

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#27

Earlier quoted context omitted.

I like to think of "peer review" in the same way as "peer code review". Just because someone looked at it and approved it doesn't mean that it is free of shortcomings and defects.

Not just "peer code review" from a good friend or someone working on the same project as you - a review from somebody who has a ton of stuff to review at once, in many different areas, and very limited time to do it.

I do peer review, and know colleagues that do as well. I'd say the median number of articles reviewed per person in a given year is 10. I don't claim to represent most reviewers, but I also don't think a presumption that reviewers primarily only have time to half-ass it is fair either.

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#28
post #2

"The investigators acknowledge some limitations on this research, including the fact that although they measured food intake, *they didn't measure what the participants were actually eating or their feelings of satiation or satiety*." This seems to directly contradict the title. EDIT: What food they are eating and how satiating that food may be is irrelevant . They did not measure the participants feelings of satiati…

Totally agree with your point and find it really annoying. The original journal entry is titled: 'Higher than predicted resting energy expenditure and lower physical activity in healthy underweight Chinese adults.' and makes no such 'less hungry' claim. That appears to have been introduced from the 'cell press' journal/article promoting organization.

Did you read the full study?

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#29

Earlier quoted context omitted.

I like to think of "peer review" in the same way as "peer code review". Just because someone looked at it and approved it doesn't mean that it is free of shortcomings and defects.

Not just "peer code review" from a good friend or someone working on the same project as you - a review from somebody who has a ton of stuff to review at once, in many different areas, and very limited time to do it.

That hasn't been my experience in academia. In peer review you can get very high quality feedback and critics. The system has been great for the overall quality.

Re: People with low BMI aren't more active, they are just less hungry, 'run hotter'

#30

To be fully honest - I can relate to this. During my college years, I ate a full-size burger, potato fries, and soda every day for lunch for ~2 years. I never got fat and retained a healthy BMI, never crossing 200lbs despite being a 6'2" male - even though I almost never exercised and spent almost all day sitting working in the Math Lab. I did skip breakfast regularly so maybe that had something to do with it. My fam…

> all day sitting working in the Math Lab

What I tell people is that my powerful brain needs a lot of calories.

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