Penn State researchers find physical movement activates brain cleaning mechanism
Updated
Updated · ScienceAlert · May 6
Penn State researchers find physical movement activates brain cleaning mechanism
7 articles · Updated · ScienceAlert · May 6
In mice, Nature Neuroscience study used two-photon microscopy, micro-CT and simulations to show abdominal contractions push blood into the spinal cord and shift the brain.
Researchers said the hydraulic-like motion drives cerebrospinal fluid out through brain tissue into the subarachnoid space, potentially helping remove waste that can contribute to neurodegeneration.
The findings offer one explanation for why cerebrospinal fluid flow differs between waking and sleep, when fluid moves in the opposite direction, and suggest everyday movement may support brain health.
Beyond sleep, does your body have a hidden hydraulic pump to clean your brain?
If abdominal movement cleans the brain, could new physical therapies replace drugs for fighting dementia?
Is your daily walk actively washing your brain to protect it from neurodegenerative diseases?
The 2026 Discovery Linking Abdominal Pressure to Brain Cleaning and Cognitive Health
Overview
A 2026 study revealed that contractions of the abdominal muscles act like a hydraulic pump, pushing blood through veins connected to the brain. This causes the brain to gently move inside the skull, creating pressure changes that boost the flow of cerebrospinal fluid. This fluid flow helps flush out harmful waste and toxic proteins linked to diseases like Alzheimer's. Even small everyday core movements and moderate aerobic exercises can trigger this cleaning process, supporting brain health and protecting against cognitive decline. Additionally, exercise may improve brain health by positively affecting the gut-brain axis, reducing inflammation and further protecting cognition.