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Keep your brain from declining after age 30

Big Think | May 1, 2026



We created this video in partnership with Unlikely Collaborators.

Every time you move your body, your brain gets what one neuroscientist calls a “bubble bath” of dopamine, serotonin, and growth factors. Here’s how to activate it.

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Neuroscientists Wendy Suzuki, PhD, Samuel Wang, PhD, and Gary Small, MD explain how movement increases blood flow, boosts growth factors like BDNF, and floods the brain with mood-lifting neurochemicals. The brain and body are in constant conversation, and plasticity means your wiring is never fixed. According to Suzuki, even ten minutes of walking can shift your brain’s chemistry immediately, flooding it in a ‘bubble bath’ of positive neurochemicals.

In other words, the way you use your body today shapes how your brain works tomorrow.

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Comments

This post currently has 46 comments.

  2. @jamesmccallum4083

    May 1, 2026 at 10:45 am

    The editing style is weird: fast intense music, cutting off conversations half way through, endless stock clips. This video seems like it’s desperate to be engaging and profound rather than informative or interesting.

  6. @ozyoutube

    May 1, 2026 at 10:45 am

    It was a great video. I especially liked the way how Dr. Suzuki explained valuable research findings so simply and elegantly. I will now go for a walk, thanks!

  7. @taiyabhamid8036

    May 1, 2026 at 10:45 am

    The crux of this video is go in line with Hippocrates advice, " Walking is the best medicine". Due to modern life and easy access to technology, transportation, and many more facilities like that, we are now adopting a sedentary lifestyle, which has ripple effects on human's life. We can easily see in our vicinity how many people are usually inactive( sedentary) in their daily lives and are using modern facilities for daily chores. Thus, obesity is at its peak, which in turn leads to many other health problems that collectively cause poor well-being. Therefore, we should opt a healthy and active lifestyle for a healthy life.

  8. @rainlovelife

    May 1, 2026 at 10:45 am

    Unfortunately truth hides in the places we would most like to ignore — if you don't want dementia, stop drinking the chemicals under your sink. Stop drinking gasoline. Sure they make you feel funny and lower your anxiety when talking to strangers, or give you that warm fuzzy relief after a long work day, but technically you are literally poisoning yourself causing permanent brain damage every time. Drinking pond scum is the number 1 thing correlated to depression, suicide, heart disease, car accidents, domestic violence, SA, and psychological and emotional instability in families and communities. The problem is, my dum dum make me funny juice isn't a toxin like every other drug that my body can filter and recover from, its literally damaging me irreparably every time and I become less and less smart enough to stop drinking that sweet sweet radiator fluid. The hardest part is how normal it is how they just serve it by the glass at Disneyland and every fucking restaurant. I think we trust that humanity as a whole, or at least our culture, societies or governments, if drinking this stuff was "really actually as dangerous as I say it is", that they as massive organizations would be able to catch such errors in judgement. Unfortunately it's the opposite. We react to the norms of our social institutions, and then we go to represent them in our daily lives and careers. Anyway, I'm 5 years off the floor cleaner and couldn't be happier with the decision. Shit tasted bad anyway.

  11. @Surface_Depth

    May 1, 2026 at 10:45 am

    Neuroscientists spend decades in graduate school developing rigorous technical vocabulary and then get in front of a camera and say wonderful bubble bath of neurochemicals, watering can of growth factors, and bigger fatter fluffier and happier brain. I appreciate this. I think this is the correct approach.

    The glasses line is doing serious work. If you forget where your glasses are, that's normal. If you forget that you wear glasses, that's dementia. This is the clearest diagnostic framework I have ever encountered and I am going to use it for everything now. Forgot your password? Normal. Forgot that passwords exist? See a doctor.

    Memory peaks at age 30 and then declines gradually is information that should come with more warning. The video just drops this in the middle like it's fine. It is not fine. A meaningful percentage of the people watching this video are already on the wrong side of 30 and are now watching their peak recede in the rearview mirror in real time while also being unable to remember where they parked.

    The spin class versus video Scrabble study is also doing a lot. Someone had to get that study funded, write that grant application, convene an ethics board, recruit participants, and explain to those participants with a straight face that they had been randomly assigned to video Scrabble. That person is a hero and I want to know more about them.

  12. @goni274

    May 1, 2026 at 10:45 am

    Ok brainiacs- from now on post your messages here either without the background music or turn the confounded thing down.
    My suggestion- turn it right off! Why? Because your information piece sounds like an infomercial!!
    Any thoughts?!🙏🏻

  20. @OneKillQuota

    May 1, 2026 at 10:45 am

    You're telling me that there was money spent on this study to find out if a group of people who are physically active would have a better brain state than people who were forced to play VIDEO scrabble? Get the fuck outta here! NO WAY! Who the hell was like "we need to see what a brain looks like when playing video games…what are the kids into today? Scrabble? Sounds good!" My own mental state would be in the fucking TRASH if you forced me to play video scrabble for three months. I'd probably slam my testicles in a car door just to feel something. Maybe next time do this study with a game that's been around since AFTER we started getting indoor plumbing. Hell, maybe even since the internet became mainstream. You might find that games in a more modern era are VASTLY more complicated than scrabble. And it might be a bit more intersting to the humans playing them for three months. This study just screams "I have no fucking clue what video games are in todays world and having an actually engaging video game might not showcase the acutal data I WANT to present…so let's pick something that only 70-year-olds still play regularly."

  21. @MuhammadHaris-hw5xp

    May 1, 2026 at 10:45 am

    Prophet Muhammad Salallah ho alahy wasalam, always used to walk very fast, almost like jogging/run. That's just one of many of his habits science today discovering very beneficial for us, including fasting. Islam is the manual/purpose for humanity.

  28. @muzzletov

    May 1, 2026 at 10:45 am

    the problem with all this: its not hollistic. it explained easily like this: imagine your skin, now imagine the most outer layer, the dead cells, basically, they serve a purpose, protecting the layer beneath. just like people with specific states of life do. because, those people modulate the collective mind in a certain way that transports resilience. for example, being more forgetful is fine, because, look at grandma, she despite that manages. its a call to resilience. old people calm your shit, frankly speaking just like amyloid beta accumulation is not necessarily a bad thing. but, you owe them – we owe them.

  41. @phlie

    May 1, 2026 at 10:45 am

    1. Exercise
    2. Train, don't strain your brain. So do things you enjoy such as crossword puzzles, learning a language, playing an instrument. Do what works for you and is enjoyable.

  43. @GodlySharing

    May 1, 2026 at 10:45 am

    “brain decline after 30” is often overstated and mixed with cultural expectation rather than direct experience. What actually changes with age is less about a sudden drop and more about shifts in attention, habits, stress load, sleep quality, and how often the mind is challenged in meaningful ways. The brain continues to adapt through neuroplasticity as long as it is being used.

    Many of the things people label as “decline” are actually the accumulation of routine and reduced novelty. When life becomes repetitive, the mind has fewer new patterns to build, so it feels slower or less sharp. But when learning, movement, curiosity, and problem solving stay active, the sense of mental vitality tends to remain much more stable than the narrative suggests.

    From an awareness point of view, the key factor is not age but engagement. The brain reflects how it is being used in the present, not a fixed downward trajectory. When attention is kept flexible and life is not reduced to automatic repetition, the sense of clarity and intelligence often stays surprisingly steady over time.

  45. @alphaomegadnb

    May 1, 2026 at 10:45 am

    Be mentally engaged in life.
    Move regularly
    Eat meat/fish (what our ancestors ate)
    Get plenty of sunshine.
    Sleep like a baby

    Your brain will thank you. ❤

  46. @Animalsonlywantkindness

    May 1, 2026 at 10:45 am

    As long as Man continues to be the ruthless destroyer of animals, he will never know health or peace. For as long as men massacre animals, they will kill each other. Indeed, he who sows the seed of murder and pain cannot reap joy and love. – Pythagoras

Comments are closed.

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