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Comment by nine_k | original | Healthy but sedentary people show early decline in cellular energy production
[−]nine_k · 2026-07-01 Wed 23:22 UTC · link
> mitochondria, which process energy within cells, showed a significantly decreased capacity to burn both sugar and fat in healthy individuals who get less than the recommended 150 minutes of exercise a week.

150 minutes a week is about than 22 minutes a day. Like 11 minutes twice a day. This looks like a really low effort to rid oneself of the risk of early decline.

[−]SchemaLoad · 2026-07-01 Wed 23:41 UTC · link
A lot of people who use a car to get around will spend most days doing literally no actual exercise. For someone who lives in a more walkable area, 22 minutes of exercise is just living live normally without actively "exercising".
[−]Insanity · 2026-07-02 Thu 01:04 UTC · link
I walk to the office during warm days, it’s about 30 minutes to get there. I get essentially an hour of walking just by commuting.

If I drive, it takes me 15 minutes (Toronto traffic is horrible). So doesn’t even gain me much in terms of time.

Just sad that temperatures here drop so low I don’t want to walk for half the year lol.

[−]sidewndr46 · 2026-07-01 Wed 23:44 UTC · link
I've seen studies like this before. They'll suggest that as little as 15 minutes of exercise significantly improves health in some group they studied. My initial assumption was they added 15 minutes of additional exercise. No, they studied people who did literally nothing. Then had them exercise 15 minutes a day.

As you might guess, their outcomes improved greatly.

[−]SchemaLoad · 2026-07-01 Wed 23:47 UTC · link
This is sadly not a rare type of person. I'm worried my parents fit this description, they drive everywhere and work an office job. I'd guess on average they get 0 minutes of exercise a day.

I think people get this image in their head that someone who doesn't exercise ever is this comically fat unemployed person when in reality it's the average office worker who isn't fitness minded. A good chunk of HN users wouldn't be getting 15 minutes of exercise a day.

[−]jraby3 · 2026-07-02 Thu 05:58 UTC · link
Looking at a few friend's health app on their iPhone it's amazing to me to see people who walk less than 2,000 steps a day and don't go to the gym. It's shockingly normal in some places though.
[−]free652 · 2026-07-01 Wed 23:47 UTC · link
15 mins of walking or exercise. I did 2 hours of walking 15k steps and it's barely moved my required cardio load to 10 and I need over 200 weekly.
[−]wodenokoto · 2026-07-02 Thu 00:23 UTC · link
HN is always so sarcastic on this point, but a large part of the population is not getting 15-30 minutes of actual exercise a day.
[−]xboxnolifes · 2026-07-02 Thu 00:43 UTC · link
The amount of time in the exercise advice keep getting shorter and shorter. The common advice when I was younger, in the USA, was an hour of exercise. Couldn't get enough people to do it. Then it was 30 minutes. Still couldn't get people to do it. Now the advice has been 15 minutes a day for a while, and we'll still not be able to get people to do it.

The environment and culture needs to be structured such that people get the exercise they need "naturally". The vast majority aren't going to go out of their way for it.

[−]Schiendelman · 2026-07-02 Thu 01:01 UTC · link
That's a big part of why zoning is so dangerous. In most of the western world (Europe too on average), we pushed down population density so much that your typical destinations are much less likely to be within walking distance, so you don't walk.
[−]nine_k · 2026-07-02 Thu 01:09 UTC · link
Indeed. In NYC I do 98% of my shopping by walking. I can reach my doctor by walking. My daughter used to walk to school because it was a 10 minutes walk (and an excellent school).

That would be impossible in a suburban setting; at best, one of these destinations would be within the theoretical waking distance, but without the walkways.

[−]Schiendelman · 2026-07-02 Thu 01:11 UTC · link
Absolutely. There's a reason body fat percentage in New York City is so much lower than anywhere else in the US!
[−]Gigachad · 2026-07-02 Thu 02:19 UTC · link
This is something I've visually observed all over Australia. The walkable areas are noticeably fitter. I don't think all of those people just happen to care about fitness more, they just spend more time moving to get between places rather than sitting all day.
[−]Schiendelman · 2026-07-02 Thu 02:24 UTC · link
Absolutely! Fitness scales super closely with localized population density.
[−]Earw0rm · 2026-07-02 Thu 06:46 UTC · link
This is a recent phenomenon.

The original reason for low population density was agricultural work, which - even in the early days of mechanisation - was plenty physical.

Living in exurbia to work and consume like a city dweller is a new kind of stupid.

[−]acuozzo · 2026-07-02 Thu 08:07 UTC · link
> That would be impossible in a suburban setting;

Not necessarily true. The "village center" idea Jim Rouse used in his design of Columbia, MD could be used to solve the problem.

All of these things are within walking distance if you live in Columbia's village of Wilde Lake (and, of course, your health insurance covers the primary care physicians in walking distance).

I'm guessing you're thinking of typical "stroad" suburbs, but alternatives are possible and do exist.

Unfortunately, the suburb has to be the product of planning like Columbia. Typical "emergent" suburbs turn into unwalkable ones.

[−]Herring · 2026-07-02 Thu 02:11 UTC · link
Yeah pretty much the only way to scale exercise to entire populations and over entire lifetimes is to design it directly into the cities.
[−]Schiendelman · 2026-07-02 Thu 02:24 UTC · link
The crazy part is you don't even have to DESIGN it, the market is desperate to build walkable density because it's so much more profitable than anything else. You just have to LET landowners build upward.
[−]Herring · 2026-07-02 Thu 02:31 UTC · link
But then you'll run into traffic/parking issues unless you have a good public transit and land use policy (e.g. bikes, trams, mixed use development, etc). That requires such good design skills few cities have mastered it (Tokyo, Copenhagen, Singapore).
[−]Schiendelman · 2026-07-02 Thu 02:48 UTC · link
I know it seems this way, but all you have to do is not subsidize driving with government provided parking, and not build highways, and there's no traffic problem, because people don't get cars in the first place - they don't have anywhere to put them and there's no highway to punch through dense neighborhoods. Transit and bike infrastructure can always be built after the fact through public demand. When you let go, the people who WANT to live in high density without cars FLOCK to what gets built.

In fact, if you really stop zoning, there's a decent chance companies will ASK to operate transit for you, because those population densities and no free car competition can make it profitable. This happens in many cities!

Mixed use development happens if you let it happen. Banks and developers like money, and mixed use makes way more money, so they want to build it. Sometimes they fuck up and don't, and those land owners pay the price and retrofit. And that's fine. Again, just let them.

In high engagement Western societies, where people get involved in politics and urban planning, "design" universally leads to car subsidies and shitty outcomes. The market does a way better job.

[−]Gigachad · 2026-07-02 Thu 04:10 UTC · link
It really doesn't take that much at all. You just have to allow apartments and mixed use zoning, and not actively chop up the land with stroads.

Human populations naturally gravitate towards walking, and it's pretty much active sabotage of the outside environment that has broken this.

[−]Fricken · 2026-07-02 Thu 00:07 UTC · link
A studied showed that elderly asians have better health outcomes that their western counterparts in part due to their practice of sitting on the floor. The added exertion of standing up from the floor rather than a chair makes a material difference in their health.
[−]Gigachad · 2026-07-02 Thu 00:12 UTC · link
At least in China they also have a lot of public parks where they all gather for group exercise with all the other elderly people.
[−]mrexroad · 2026-07-02 Thu 00:52 UTC · link
And the Bay Area as well :)
[−]mc3301 · 2026-07-02 Thu 00:19 UTC · link
Some of the health tests in Japan that elderly people take include a "standing to sitting on the floor and getting back up all unsupported" test. Scores are based on time, effort, emitted sounds (like grunts), hands-on-ground and whatnot. I don't know the specifics, but it is used as a "health measure."
[−]nickjj · 2026-07-02 Thu 00:23 UTC · link
I remember reading somewhere that one of many long life markers is if you can go from sitting on your butt straight into standing without your hands or knees touching the floor.