How does exercise keep your brain young?

Sciencemag.org
September 10, 2018
By Sciencemag.org
Stay active; age gracefully.

Behind this truism, there's a pile of unanswered scientific questions. Researchers are still sorting out what it is about physical activity that seems to lower the risk of dementia later in life. Even more uncertain is whether the effects of exercise can alter the course of diseases that cause dementia—chief among them, Alzheimer's disease—once they've already taken root. | READ MORE

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