We already know that moving your body is important for brain health, but a new study reveals a possible reason why: It could be triggering a kind of hydraulic pump that flushes out fluid in the brain.

By studying mice and conducting simulations, researchers at the Pennsylvania State University (Penn State) have found that movements in the abdominal muscles can ripple all the way up to the brain, potentially cleaning out waste materials that build up during the day.

It’s tangible evidence that what goes on in our brains and our bodies isn’t so separate after all, and a good reminder to get that body moving, in whatever way works for you, throughout the day.