There’s a reason walking feels like a mental refresher. Leg movement boosts circulation, pushing oxygen- and glucose-rich blood toward the brain. With improved blood flow, the brain gets the nourishment it needs, and harmful toxins are more efficiently cleared.
Long periods of inactivity can create the opposite effect. Without frequent movement, circulation slows, brain fog increases, and over time, critical brain structures might begin to shrink. The legs, in this way, are like pumps, keeping the mind active by staying in motion.