That small walk around the block or quick core workout may be doing more for your brain than you realize.
A new study from Pennsylvania State University suggests that tiny everyday movements, particularly those involving the abdominal muscles, could help the brain clear out waste and toxins in a way that resembles what happens during sleep. Researchers found that when mice walked or even slightly contracted their abdominal muscles, their brains subtly shifted inside the skull, helping move cerebrospinal fluid through the brain.
Scientists believe this movement may support the brain’s glymphatic system, the natural cleaning process that removes harmful waste proteins like amyloid-β and tau, which have been linked to Alzheimer’s disease and cognitive decline. Typically, this process is most active during deep non-REM sleep, but researchers now think physical movement during the day may also help stimulate the system.
What makes the findings especially interesting is how minimal the movement actually was. Researchers emphasized that the motion generated was “so small,” similar to what happens during walking or basic abdominal contractions during everyday activity. Even gentle movement appeared to create measurable effects on brain fluid flow.
The study arrives as physical inactivity continues to rise. According to the CDC, only 47.2% of U.S. adults met recommended aerobic activity levels in 2024, despite federal guidelines suggesting at least 150 minutes of moderate exercise each week plus muscle-strengthening activities twice weekly.
Experts say the findings add to growing evidence that regular movement plays a major role in long-term brain health. Sedentary lifestyles have already been linked to higher risks of dementia, cardiovascular disease, depression, obesity, and type 2 diabetes. Even small daily habits like walking, stretching, or engaging your core throughout the day may help support both physical and cognitive wellness over time.