Rhonda Patrick· PhD
Exercise causes muscles to produce lactate, which travels to the brain, triggering the production of neurotransmitters like norepinephrine and neurotrophic factors like BDNF.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Exercise causes muscles to produce lactate, which travels to the brain, triggering the production of neurotransmitters like norepinephrine and neurotrophic factors like BDNF.
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