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Daily energy expenditure through the human life course

research.brighton.ac.uk

81–90 of 256 posts

Re: Daily energy expenditure through the human life course

#81
post #52

Earlier quoted context omitted.

A lot of skinny people have high metabolism, how do you explain that?

I'm not saying metabolism doesn't vary among individuals, I'm saying for a given individual, their overall metabolism could decrease as they age due to having less muscle mass even if their rate per kg muscle didn't change.

Yeah I agree muscle is a big factor, given you use it too

Re: Daily energy expenditure through the human life course

#82
post #58

Earlier quoted context omitted.

Fidgeting.

Then why can't someone just make an exercise program that replicates this fidgeting. How is fidgeting more potent than 10,000+ steps/day , which a lot of people do but still stay fat.

You may as well ask if John Carmack is so productive because he's really motivated, why can't someone "just" make a productivity program that replicates this motivation, and then we can all be that productive. How is 'motivation' more potent than 8hrs/day which a lot of people do and still aren't as productive.

Re: Daily energy expenditure through the human life course

#83
post #58

Earlier quoted context omitted.

Fidgeting.

Then why can't someone just make an exercise program that replicates this fidgeting. How is fidgeting more potent than 10,000+ steps/day , which a lot of people do but still stay fat.

Fidgeting can make a big difference, at least it’s appeared that way in a couple sources I’ve seen referenced here in the past - failing to have those handy I found this: https://pubmed.ncbi.nlm.nih.gov/15681386/

No idea how accurate it is, but an extra 350 calories burned is a pretty big improvement over _not_ having those burned.

I doubt fidgeting alone is sufficient to keep most people skinny. There’s a lot that impacts our weight. But if somebody’s automatically burning calories because they have a hard time stopping fidgeting, that might ease the load a bit so they could eat a bit more or walk a little less than would be the case without it.

EDIT: it feels worth mentioning that fidgeting can be an all day activity for some people, 8+ hours. Walking 10k steps takes maybe 1.5 hours, more or less depending on the persons speed. It wouldn’t be as much of a workout replacement as a whole lifestyle change.

Re: Daily energy expenditure through the human life course

#84

Anecdotally: I havent changed diet one bit, actually I eat way healthier than when I was younger. And still weigh much more than when younger.

That is likely down to the type of "food" that you are eating. Or you are eating more than is necessary. A diet that contains a high nutritional content will prevent you from over-eating due to satiety signals (unless you have a hormone issue) rather than eating to the point of feeling "stuffed" - if someone is eating to the point of feeling "stuffed" then it would suggest that they are not eating food with a high nu…

A diet that contains a high nutritional content will prevent you from over-eating due to satiety signals (unless you have a hormone issue) rather than eating to the point of feeling "stuffed" - if someone is eating to the point of feeling "stuffed" then it would suggest that they are not eating food with a high nutritional content, or that they have some disorder that is interfering with their normal eating process.

if this were true it would be possible to create a diet full of foods with such satiety signals and the obesity crisis could be fixed. way easier said than done. 7-grain bread is very nutritious yet a loaf is easily 1000+ calories. Easy to overeat on it given it's just mostly air.

Re: Daily energy expenditure through the human life course

#85
post #52

Muscle burns more energy than fat. As people age, their muscle mass declines without sufficient exercise, so we'd naturally expect the average person's metabolism to decline via this even if "metabolism per kg muscle" didn't change.

A lot of skinny people have high metabolism, how do you explain that?

Over my life I’ve been close to a small handful of perpetually skinny people who thought they had high metabolisms. In every case, when I watched them closely, I realized they barely ate anything.

My ex-gf was one of these people and would routinely tell people about how she could eat anything and not gain weight. But when I would go on a severely calorie-restricted diet I was still eating more than she did on a normal day. I don’t think she was lying about being able to eat anything, I think she just didn’t realize how little she actually ate.

Re: Daily energy expenditure through the human life course

#86
post #58

Earlier quoted context omitted.

Fidgeting.

Then why can't someone just make an exercise program that replicates this fidgeting. How is fidgeting more potent than 10,000+ steps/day , which a lot of people do but still stay fat.

People walk 10k steps a day and stay fat because they eat too much.

Re: Daily energy expenditure through the human life course

#87

Earlier quoted context omitted.

yep, so many people go from 10k steps a day in college to 5k in an entry level position to 1k in a desk role. for a 200lb 6 ft tall male, thats 3000 kcal burned a day to 2600, to 2300. 700kcal a day being a weight change total of around 1.5 lb a week when you consider days off.

Multiply that by 15-20 years and you’re looking at a solid extra 200lbs you have. Naturally every 40 or so makes you look in the mirror, make some minor changes that last a year or maybe a bit more and it’s back to getting out from under the gelatin we’re packing onto ourselves. In order to really, truly, get a handle on your weight - you need to increase muscle mass, operate at a slight caloric deficit, eliminate ex…

Then why do so many people go to the gym, do 10k steps/day, intervals, etc. yet do not lose weight? Americans are arguably more active and health conscious than ever before as evidenced by the huge popularity of fitness content on YouTube, record number of gym memberships and attendance, the huge popularity of fitness apps, awareness of GMOs, food tracking apps, etc. yet fatter than ever too.

Re: Daily energy expenditure through the human life course

#88

Earlier quoted context omitted.

Then why can't someone just make an exercise program that replicates this fidgeting. How is fidgeting more potent than 10,000+ steps/day , which a lot of people do but still stay fat.

You may as well ask if John Carmack is so productive because he's really motivated, why can't someone "just" make a productivity program that replicates this motivation, and then we can all be that productive. How is 'motivation' more potent than 8hrs/day which a lot of people do and still aren't as productive.

it's not at all the same thing. fidgeting is a movement. so is exercise. productivity is something more vague.

Re: Daily energy expenditure through the human life course

#89

Earlier quoted context omitted.

Multiply that by 15-20 years and you’re looking at a solid extra 200lbs you have. Naturally every 40 or so makes you look in the mirror, make some minor changes that last a year or maybe a bit more and it’s back to getting out from under the gelatin we’re packing onto ourselves. In order to really, truly, get a handle on your weight - you need to increase muscle mass, operate at a slight caloric deficit, eliminate ex…

Then why do so many people go to the gym, do 10k steps/day, intervals, etc. yet do not lose weight? Americans are arguably more active and health conscious than ever before as evidenced by the huge popularity of fitness content on YouTube, record number of gym memberships and attendance, the huge popularity of fitness apps, awareness of GMOs, food tracking apps, etc. yet fatter than ever too.

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Re: Daily energy expenditure through the human life course

#90

Earlier quoted context omitted.

muscle burns very little calories, and even pro bodybuilders who have lots of muscle quickly put on fat off-season when not dieting. I don't think this explains it.

Muscle tissue burns 7-10 calories per pound per day. This means someone who gains 100 pounds of muscle (e.g. from 150 lbs untrained to a 250 lbs bodybuilder) would increase their metabolism by 700-1000 calories, almost a 50% increase in the average daily male calorie requirements of around 2000 calories.

Putting on 100 lbs of muscle is impossible without steroids for 99% of people even with 10-15 years of constant training.

Estimates vary but 50 lbs of lean muscle mass is generally considered the natural maximum for men.

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