131–140 of 186 posts
I would be more interested in a discussion of the benefits of the different types of exercise. I see there is this sentiment about seeing the same type of exercise is good for you articles every week. Which types help lower cholestrol? Which types are best for the heart?
http://www.heart.org/HEARTORG/HealthyLiving/PhysicalActivity...
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You are assuming Hunter/Gatherers expend more energy than modern humans, which is not true ( http://journals.plos.org/plosone/article?id=10.1371/journal.... ) Physical activity levels were also within a standard deviation of one another (between western and h/g populations). The brain evolved in similar conditions to modern man. I would argue current conditions are far better for the brain in terms of good nutrition…
> Repair enzymes from one part of they also effecting another That's an even more fascinating idea; so what other things could create the conditions for other repair systems to be activated. Maybe meditation, maybe different drugs, plants, ketosis etc...
And, of course, we know nutrients like Zinc and Vitamin C are essential for tissue repair via being essential for DNA replication.
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Probably because you're talking about academic success which is only loosely correlated to intelligence, and almost entirely not correlated to "brain health." "Brain health," as it's used in this article, would also contribute to coordination, muscle control, and various other things that would benefit athletes in ways that are totally opaque to you or me. The article doesn't say exercise makes you smarter , and even…
Fair point. I guess by smart I'm thinking "least work for best grades" but that's a very loose definition. Also - it's a very small sample size. And if I look more broadly... 2 of the seemingly "dumbest jocks" I knew in college went on to become doctors, one at the Mayo clinic. So perhaps their intelligence was showing in other areas until they got out of school.
The connection between exercise and brain health has now been super conclusively and astonishingly shown, but what are some possible evolutionary reasons for this connection? Maybe the extra energetic investment in brain health is only justified when there is an energetic surplus, and doing exercise correlates with having extra energy available? (As opposed to starving and thus needing to conserve energy.) But that d…
Both physical activity and brain-health improve survival and a small group of people whose brain became healtheir with physical activity survived at a faster rate than others.
Isn't it obvious ? I would assume exercise for early humans did not mean spending 30 minutes running for no reason. They probably spent that time running after a rabbit or running way with someone else's wife on his shoulder etc or tribes that kept well trained armies probably survived at a higher rate than tribes that relied on the Shaman to summon the dead.
Why do we have an article saying basically the same thing every single week here? I get it, and I think everyone here has, exercise is good for you, in many ways, don't sit on your ass all day. I guess it's sad to see this becoming the "Good Morning America" of tech (not that we didn't have those ones already) or the ultra localized we-only-care-about-the-bay-area medium.
Personally, I enjoy when health related things are posted here because the HN community does a good job of parsing the bullshit from the useful information. Also, this is a newly discovered mechanism for exercise being healthy, so it's not exactly "the same thing." I've been checking the comments regularly to get HN's "take."
Furthermore, health-related articles are extra beneficial for the HN community, since most people here probably have very sedentary jobs.
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Prehistoric humans likely exercised as a matter of course. They weren't sedentary. The brain evolved assuming the condition of exercise. naturally occurring byproducts of exercise were just always there for the brain to use.
You are assuming Hunter/Gatherers expend more energy than modern humans, which is not true ( http://journals.plos.org/plosone/article?id=10.1371/journal.... ) Physical activity levels were also within a standard deviation of one another (between western and h/g populations). The brain evolved in similar conditions to modern man. I would argue current conditions are far better for the brain in terms of good nutrition…
As expected, physical activity level, PAL, was greater among Hadza foragers than among Westerners.
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>during those releases the brain also had to work hardest That is speculation, and is unintuitive. Why would the brain "work hardest" when running? Why would modern humans not exert the same forces during sport? Why would humans, the top group-oriented predator, run from a lion? The data linked above shows that observed Physical Activity Levels and caloric use are comparable to modern day. Stop inserting your own ass…
> Why would humans, the top group-oriented predator, run from a lion? I'd sure run from a lion if it was coming at me.
Ghost & The Darkness aside, lions generally don't hunt humans. But humans did spend a bunch of time pursuing game over long distances.
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a lot of people cant exercise though
> a lot of people WONT exercise though Honestly, considering the overweight and obese population is growing we have a problem with systemic overeating that needs to be corrected first. It doesn't matter how much exercise you do if you eat more than you need.
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Enjoy your limited life span, lack of energy, and general attractiveness. There's no secret here; you get out what you put in. Everyone wants to be in shape, no one wants to lift heavy things.
Since getting into fitness. I would say the easy part of lifting. The hard part is the diet.
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Fair point. I guess by smart I'm thinking "least work for best grades" but that's a very loose definition. Also - it's a very small sample size. And if I look more broadly... 2 of the seemingly "dumbest jocks" I knew in college went on to become doctors, one at the Mayo clinic. So perhaps their intelligence was showing in other areas until they got out of school.
Similarly, one of the 'dumb jocks' from my high school just graduated with a PhD from Harvard, which means humans are awful at estimating the intelligence of others.