Exercise may help the brain clean out waste, scientists find

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Scientists found that the brain is more physically linked to the body than believed. A team used mice and computer models to uncover why physical activity benefits brain health.

Their findings suggest that when abdominal muscles tighten, they squeeze blood vessels connected to the spinal cord and brain.

This pressure causes the brain to shift slightly inside the skull. That small motion helps cerebrospinal fluid move across the brain, which may carry away waste that can interfere with normal brain function.

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