21–30 of 256 posts
This doesn't seem to line up anecdotally; The first outlier I see is female health and PCOS, starting in mid 20s for women. The next outlier I see is insulin resistance and pre and diabetes based metabolism decline. From a hormone perspective, nose, ear, chin (femalr), and head hair seem to be going under significant change.
Super useful outcome, especially given I find that people think that after reaching even young ages 24, 25 even begin thinking that metabolism has some extreme drop off right after reaching young adulthood
Around age 21 or so, I decided to try to drop a couple pounds and make it a really cut six-pack. I ate a strict 1400 calorie diet (packaged food to make it easy, no cheating at all) for about three months. I started running a couple times a week. I’d reckoned this would only take a month or so. Found the calorie deficit pretty easy, actually. Three months in, the scale showed one pound of loss.
Discouraged, I returned to my old eating habits.
I immediately gained about 15lb. Had to drop soda completely to stabilize it (i didn’t drink much alcohol then). Slowly got worse through my 20s. By 30, not turning into a blimp required a careful diet. No more 4k+ calories of pizza, soda, and potato chips without (visible) consequence.
My metabolism 100% for-sure changed in my 20s, a ton, not gradually. But I may have killed it, and perhaps I would have been able to keep doing what I was doing another couple decades otherwise (I would bet zero dollars on it, but hey, I guess the science disagrees, I just find it literally incredible)
"We compiled measurements of total energy expenditure (TEE) and basal metabolic rate (BMR) from human endurance events and added new data from adults running ~250 km/week for 20 weeks in a transcontinental race. For events lasting 0.5 to 250+ days, SusMS decreases curvilinearly with event duration, plateauing below 3× BMR. This relationship differs from that of shorter events (e.g., marathons). Incorporating data from overfeeding studies, we find evidence for an alimentary energy supply limit in humans of ~2.5× BMR; greater expenditure requires drawing down the body’s energy stores. Transcontinental race data suggest that humans can partially reduce TEE during long events to extend endurance."
Earlier quoted context omitted.
I agree with your observation, but at the same time, I do think that what a lot of these people might be expressing is their observation of the disconnect between their socially implanted expectations (you're an adult when your 18/21! you are now -mature-), and their experience reality. Which is that for many (most?) people who go through the typical North American education pipeline through university/college (and I…
I some times make the following observation: When I was 15, I thought I had grown up quite a lot and looked back on my 10-year old self as someone who was just getting started. When I was 20, I thought I had grown up quite a lot and looked back on my 15-year old self as someone who was just getting started. When I was 25, I thought I had grown up quite a lot and looked back on my 20-year old self as someone who was j…
6 months ago I was an idiot.
Last week I was an idiot.
...
Glad I'm smarter now.
Super useful outcome, especially given I find that people think that after reaching even young ages 24, 25 even begin thinking that metabolism has some extreme drop off right after reaching young adulthood
Anecdata: I ate 3500-4000 calories a day of mostly junk in high school and college. I lifted weights some. I (barely) “had a six-pack”. No sports, only incidental cardio. Around age 21 or so, I decided to try to drop a couple pounds and make it a really cut six-pack. I ate a strict 1400 calorie diet (packaged food to make it easy, no cheating at all) for about three months. I started running a couple times a week. I’…
I started gaining weight/fat in my mid 20s and had to adjust my eating habits from what was normal in the preceding 8-10 years
Another sobering result for the fitness industry, that convinces 30 year old men to be on TRT.
Convincing men at basically peak testosterone production to permanently impair their natural ability to produce it. It's awful. Not to mention the side effects of taking exogenous hormones e.g. damage to your liver...
And still weigh much more than when younger.
Inactivity alone does not explain it. Consider for example Bill Gate...according to his resume, in which he lists his precise height and weight, in his 20s he weighed just 125 pounds. It's evident he has put on a lot of weight, all in his mid-section, well before he turned 60. His job literally entailed sitting at a computer all day coding. If anything, given his philanthropy efforts and retirement, he is more active now than he was in his 20s when working full-time at Microsoft. Is he eating more? I doubt it.
For so many people, celebrities for example, a switch is flipped in which there is sudden weight gain after the age of 30 or so, like John Travolta, Stevie Wonder and others. Because celebrities are photographed, you can see the weight progression and the abrupt jump in weight. Even with money for personal chefs and trainers, not gaining weight is hard.
I can personally attest that if I ate the same quantity of food now as I did at 20 I would gain weight, and no I'm not 60. And I am just as active , maybe more so. So yeah not buying this study.
Earlier quoted context omitted.
Anecdata: I ate 3500-4000 calories a day of mostly junk in high school and college. I lifted weights some. I (barely) “had a six-pack”. No sports, only incidental cardio. Around age 21 or so, I decided to try to drop a couple pounds and make it a really cut six-pack. I ate a strict 1400 calorie diet (packaged food to make it easy, no cheating at all) for about three months. I started running a couple times a week. I’…
Teens are growing until early 20s that’s why they can and do eat so much. When you stop growing you enter into your adult metabolism. I started gaining weight/fat in my mid 20s and had to adjust my eating habits from what was normal in the preceding 8-10 years
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.