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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'

#121

Post by ajuc »

chrisseaton wrote: post #86
klyrs wrote: post #68

Earlier quoted context omitted.

I've known very active cyclists that couldn't lose weight despite riding hundred mile rides weekly. In my youth, I could eat anything and do nothing and not suffer the consequences. I definitely fit the "run hot" part but I was the plate-cleaner in my family and didn't really stop eating like that until I was in my late 30s and suddenly started gaining weight.

> I've known very active cyclists that couldn't lose weight despite riding hundred mile rides weekly. Isn’t this against the laws of physics? If you’re burning a ton of energy and not eating excessively, where are their bodies getting mass from to maintain weight?

100 miles weekly isn't THAT much in terms of kcal. 10 miles is about 600 kcal. 100 miles is 6000 kcal, let's say 7000 to round that to 1000 kcal a day.

Eating 1000 kcal more a day is pretty easy to do without noticing. Especially when you eat a lot on the day that you biked (cause "you earned it").

For example 2 liter bottle of coke is 800 kcal and 1 protein bar is about 250 kcal and you're already over the budget (assuming you also eat your "regular" food).

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

#122

Post by melenaboija »

sleepydog wrote: post #46
the_only_law wrote: post #35

Seems to line up with my experience, am always burning up (until I turn on the AC and freeze) Especially at night though I have to to jack the temperature down or I won't sleep. Also less hungry aligns pretty well. Unfortunately when I get hungry, it's normally "a little hungry) at akward spread out intervals. I probably feel most hungry after midnight but never eat then because well, I have to sleep soon. I've tried…

If you run hotter, wouldn't you feel less hot? Since your normal temperature would be that much higher than the ambient temperature. At least, when I have a fever I feel cold, even though I'm hot.

I am not sure that is true, at least from my experience.

As the GP I get hot during the night and my wife is freezing, and although I have never measured my body temp my wife always says that she can feel how my body can irradiate heat. At the beginning I thought she was joking but after many years and empirical testing (when she says she can feel heat I am hot) I feel it is true. And this always happens if I ingest carbs for dinner, always.

About what you say, I am not sure the brain processes that it feels hot because the temperature from outside of your body is higher than yours but because your body is actually hotter than usual and one of the reasons could be because the environment temp is actually heating up your body. But I am not a neurologist or even close so I may be completely wrong.

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

#123

Post by Spooky23 »

sudden_dystopia wrote: post #42

The study was underweight bmi vs healthy bmi. Nothing about overweight bmi, which I would assume is the trifecta of overeating, little activity, and slower metabolism. At least that is my personal experience in going from overweight to healthy bmi. Really not surprising that people that eat less have lower bmi and higher metabolism than people that eat more with a slower metabolism but who are more active.

When I was 16, I was playing varsity basketball, baseball, track and was working on a farm doing heavy work all summer.

Per the doctor, I was obese. My wife was obese because breasts. BMI is bullshit imo, it has some general value but creates a lot of distress for people, especially women.

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

#124

Post by mensetmanusman »

My mother moved in so we could care for her. I walked with her daily for over a year and she lost a pound per week with no diet change (~50lb).

Winter/sprain made her seditary again then her body re-equilibriums right back in about 3 months.

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

#125

Post by ripply »

CJefferson wrote: post #113

I think the hungry bit is often under-discussed. I lost 75kg over 3 years, then put exactly 75kg back on over the 4 years after that. While losing weight, and keeping it off (for about 6 months), I was hungry all the time, every day. I hoped that my body would eventually "get used" to the new standard, but in the end (not conciously), I gave up -- it was too mentally tiring to be hungry whenever I was awake. I'm sure…

When I lost 13kg I had the same problem, I put it all back on immediately - I had an insatiable hunger after losing the weight. I ended up losing it all over again 6ish months later but this time I was able to keep it off because I didn’t have the hunger. The only difference was I lost it doing keto for the last month and I ate way healthier.

I also run very hot and have a normal BMI now.

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

#126

Post by chrchr »

marifjeren wrote: post #82

"people with low BMI" seems like it refers to a large group of healthy people, but it actually refers to folks who are underweight. In China, that's like 1 in 10 people. In the USA it's closer to 1 in 50. I wonder what kind of genetics and behavior you have to have to be underweight in the USA.

Also note that the subjects of this study were found to have subclinical hyperthyroidism. It’s an interesting study for what it tells us about metabolism, but the study subjects are probably not a model for health.

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

#127

Post by tunap »

Anecdote: My temp has been averaging 96.7 throughout the Covid testings, I sweat more than most when awake and also when I sleep. I most often eat a hearty breakfast and am always grazing on bananas, granola, nuts, jerky... and there is always room for a honey bun or a chunk of chocolate, too. I don't eat lunch and forget / forego(too close to bedtime) dinner often enough. I keep my calories in line with my activities: More physical, more calories / Slow days, I don't get hungry and forget, or forego. And yeah, I'm active in work & play... use it or lose it is a critical component in my 2nd life(1).

(1) “We all have two lives, the second life begins when we realize we only have one.”

― Confucius

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

#128

Post by dghughes »

My weight was a consistent 150 pounds since I was 14 years old. I joked to myself I was a robot since it was incredibly consistent for decades.

I would often go entire days without eating. My family says as a kid or teen I would always cover my food with a napkin to hide what I had not eaten. Even as an adult I would rarely eat a fast food combo there would be half the burger and fries left over. I ate what I need even pop and chips but I ate a bit and when I wasn't hungry I stopped.

In my mid 40s I felt lethargic bad and my face was puffy. Stranger still I was gaining weight and eating more than I ever did. I'd eat when I wasn't hungry which was a bizarre feeling. At the worst I was 190lbs the heaviest in my life. I was not a coffee or tea drinker but I got into energy drinks they made me feel normal.

I went to the doctor and found out it was my thyroid I had hypothyroidism (under active). My Dad had it and now I did rare for men hypothyroidism more common in middle-aged women. My first synthroid pill felt like I'd drank ten energy drinks my skin was warm I felt clear of thought. But now it's stabilized and I think I'm on the downward slide again.

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

#129

Post by Terretta »

tonyarkles wrote: post #106
Terretta wrote: post #83

Yes, and, about 8 minutes of true HIIT* at least 3 days a week for 6 weeks is proven to adjust your metabolic run level. Graph your weight. After 6 weeks of HIIT, you'll see weight really shed because you're not burning calories during exercise but 24/7, and because of that metabolic shift, the weight will continue to shed for months even if you stop HIIT. * HIIT is High Intensity Interval Training. It's a technical…

It's really quite amazing how quickly it affects aerobic endurance as well. I had a knee injury, waited 9 months for surgery, recovered, did a self-planned physio routine, and started feeling ready to get back into aerobic exercise. There was a 5km fun run in town that I figured I'd use as motivation. I did a slightly modified HIIT routine: walking warm up to the football field a few blocks away from my house, 8x fla…

> It's really quite amazing how quickly it affects aerobic endurance as well.

Absolutely correct. After HIIT, brisk walking blocks of Manhattan wouldn't make me sweat even if it had before.

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