A Bizarre Reason You Should Walk? It creates optic flow. Optical flow, such as the movement of objects past you as you walk, quiets some of the circuits responsible for stress. Walk, jog, run, or swim, and you may derive peace from optical flow. You can calm brain circuits central to threat detection. When our brain circuitry interprets that we are moving through space, we can get a sense of relaxation. Have you heard of optic flow? It’s one more reason for walking right for you. Optical flow (o