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Keep your brain from declining after age 30

Posted

April 30, 2026

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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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Keep your brain from declining after age 30 · Big Think · Sentinel